Merge 026a3aefa4 into 86da601ad6

.gitignore

@@ -39,8 +39,16 @@ build/
 .DS_Store
 
 ### Application Specific ###
-application-local.properties
+config-local.properties
 *.db
 pipes/
 *.log
 /.idea/
+
+ Configuration files with sensitive credentials
+# These files contain database passwords and API keys and should never be committed
+src/main/resources/config.properties
+src/main/resources/application.properties
+
+# Allow example configuration files to be committed
+!src/main/resources/*.properties.example

README.md

@@ -34,7 +34,7 @@ MediaManager-Core/
 │       │           ├── util/           # Utility classes
 │       │           └── MediaManagerApplication.java
 │       └── resources/
-│           ├── application.properties   # App configuration
+│           ├── config.properties       # App configuration
 │           ├── log4j2.xml              # Logging configuration
 │           └── META-INF/
 │               └── persistence.xml     # JPA configuration
@@ -55,7 +55,7 @@ GRANT ALL PRIVILEGES ON DATABASE mediamanager TO mediamanager;
 
 ### 2. Configuration
 
-Edit `src/main/resources/application.properties` and update the database credentials:
+Edit `src/main/resources/config.properties` and update the database credentials:
 
 ```properties
 db.url=jdbc:postgresql://localhost:5432/mediamanager
@@ -90,7 +90,7 @@ The application creates named pipes for inter-process communication. Default con
 - Pipe name: `mediamanager-pipe`
 - Buffer size: 8192 bytes
 
-You can modify these settings in `application.properties`.
+You can modify these settings in `config.properties`.
 
 ## Logging
 
@@ -116,8 +116,8 @@ mvn test
 
 ## Dependencies
 
-- PostgreSQL Driver: 42.7.3
+- PostgreSQL Driver: 42.7.5
-- Hibernate ORM: 6.4.4.Final
+- Hibernate ORM: 7.1.7.Final
 - HikariCP: 5.1.0
 - Log4j 2: 2.23.1
 - Jackson: 2.16.1

pom.xml

@@ -13,7 +13,7 @@
         <maven.compiler.target>17</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <hibernate.version>7.1.7.Final</hibernate.version>
-        <postgresql.version>42.7.5</postgresql.version>
+        <postgresql.version>42.7.7</postgresql.version>
         <hikaricp.version>5.1.0</hikaricp.version>
         <log4j.version>2.23.1</log4j.version>
         <junit.version>5.10.2</junit.version>
@@ -35,6 +35,12 @@
             <version>${hibernate.version}</version>
         </dependency>
 
+        <dependency>
+            <groupId>org.hibernate.orm</groupId>
+            <artifactId>hibernate-community-dialects</artifactId>
+            <version>${hibernate.version}</version>
+        </dependency>
+
         <!-- HikariCP for connection pooling -->
         <dependency>
             <groupId>com.zaxxer</groupId>
@@ -55,7 +61,7 @@
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
-            <artifactId>log4j-slf4j2-impl</artifactId>
+            <artifactId>log4j-slf4j-impl</artifactId>
             <version>${log4j.version}</version>
         </dependency>
 
@@ -78,9 +84,32 @@
             <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>com.google.protobuf</groupId>
+            <artifactId>protobuf-java</artifactId>
+            <version>4.32.0</version>
+        </dependency>
+        <dependency>
+            <groupId>org.xerial</groupId>
+            <artifactId>sqlite-jdbc</artifactId>
+            <version>3.44.1.0</version>
+        </dependency>
+        <dependency>
+            <groupId>org.reflections</groupId>
+            <artifactId>reflections</artifactId>
+            <version>0.10.2</version>
+        </dependency>
     </dependencies>
 
     <build>
+        <extensions>
+            <extension>
+                <groupId>kr.motd.maven</groupId>
+                <artifactId>os-maven-plugin</artifactId>
+                <version>1.7.1</version>
+            </extension>
+        </extensions>
+
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -91,11 +120,75 @@
                     <target>17</target>
                 </configuration>
             </plugin>
+
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
                 <version>3.2.5</version>
             </plugin>
+
+            <!-- Protocol Buffers Plugin -->
+            <plugin>
+                <groupId>org.xolstice.maven.plugins</groupId>
+                <artifactId>protobuf-maven-plugin</artifactId>
+                <version>0.6.1</version>
+                <configuration>
+                    <protocExecutable>/usr/bin/protoc</protocExecutable>
+                    <protoSourceRoot>${project.basedir}/src/main/proto</protoSourceRoot>
+                    <outputDirectory>${project.build.directory}/generated-sources/protobuf/java</outputDirectory>
+                    <clearOutputDirectory>false</clearOutputDirectory>
+                </configuration>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>compile</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+
+            <!-- Build Helper Plugin - Adiciona generated sources ao classpath -->
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>build-helper-maven-plugin</artifactId>
+                <version>3.5.0</version>
+                <executions>
+                    <execution>
+                        <id>add-source</id>
+                        <phase>generate-sources</phase>
+                        <goals>
+                            <goal>add-source</goal>
+                        </goals>
+                        <configuration>
+                            <sources>
+                                <source>${project.build.directory}/generated-sources/protobuf/java</source>
+                            </sources>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+
+            <!-- Maven Shade Plugin - Creates executable JAR with all dependencies -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.5.1</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <transformers>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <mainClass>com.mediamanager.MediaManagerApplication</mainClass>
+                                </transformer>
+                            </transformers>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>
 

src/main/java/com/mediamanager/MediaManagerApplication.java

@@ -1,5 +1,8 @@
 package com.mediamanager;
 
+import com.mediamanager.service.database.DatabaseManager;
+import com.mediamanager.service.delegate.DelegateActionManager;
+import com.mediamanager.service.ipc.IPCManager;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
@@ -7,9 +10,25 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.Properties;
 
+import com.mediamanager.service.database.SqliteDatabaseManager;
+
 public class MediaManagerApplication {
     private static final Logger logger = LogManager.getLogger(MediaManagerApplication.class);
     private static Properties config;
+    private static DatabaseManager databaseManager;
+    private static DelegateActionManager actionManager;
+    private static IPCManager ipcManager;
+
+    public enum ApplicationMode {
+        LOCAL("local"),
+        SERVER("server");
+
+        private final String value;
+
+        ApplicationMode(String value) {
+            this.value = value;
+        }
+    }
 
     public static void main(String[] args) {
         logger.info("Starting MediaManager Core Application...");
@@ -17,19 +36,85 @@ public class MediaManagerApplication {
         try {
             // Load configuration
             loadConfiguration();
+            String runTypeString = config.getProperty("runtype","local");
+            ApplicationMode mode = null;
+
+            for (ApplicationMode am : ApplicationMode.values()) {
+                if (am.value.equalsIgnoreCase(runTypeString)) {
+                    mode = am;
+                    break;
+                }
+            }
+            if (mode == null) {
+                logger.error("Invalid run type: {}", runTypeString);
+                throw new Exception("Invalid run type: " + runTypeString);
+            }
+            logger.info("Run type: {}", mode);
+            switch (mode) {
+                case LOCAL:
+                    logger.info("Starting local database...");
+                    databaseManager = new SqliteDatabaseManager(config);
+                    break;
+                case SERVER:
+                    throw new Exception("Server mode not yet implemented");
+                default:
+            }
+            databaseManager.init();
+            actionManager = new DelegateActionManager(databaseManager.getEntityManagerFactory());
+            actionManager.start();
+            ipcManager = new IPCManager(config,actionManager);
+            ipcManager.init();
 
-            // TODO: Initialize database connection
-            // TODO: Initialize IPC server with named pipes
             // TODO: Start application services
 
             logger.info("MediaManager Core started successfully");
-            logger.info("IPC Pipe: {}", config.getProperty("ipc.pipe.path") + "/" + config.getProperty("ipc.pipe.name"));
+            logger.info("IPC Socket: {}", ipcManager.getSocketPath().toAbsolutePath().toString());
 
             // Keep application running
             Runtime.getRuntime().addShutdownHook(new Thread(() -> {
+
                 logger.info("Shutting down MediaManager Core...");
-                // TODO: Cleanup resources
+
+
+                if (databaseManager != null) {
+                    databaseManager.close();
+                }
+
+                if (ipcManager != null) {
+                    try {
+                        ipcManager.close();
+                    } catch (Exception e) {
+                        throw new RuntimeException(e);
+                    }
+                }
+
+                if (actionManager != null) {
+                    actionManager.stop();
+                }
+
+                logger.info("MediaManager Core shutdown successfully");
+                logger.info("Goodbye!");
+
+
+                // Give Log4j2 time to write all pending messages before shutting down
+                try {
+                    Thread.sleep(1000);
+                } catch (InterruptedException e) {
+                    Thread.currentThread().interrupt();
+                }
+
+                // Now shutdown Log4j2
+                org.apache.logging.log4j.LogManager.shutdown();
             }));
+            logger.info("Application is running");
+            logger.info("Press Ctrl+C to exit");
+            Thread.currentThread().join();
+
+        } catch (InterruptedException e) {
+
+            logger.info("Application interrupted, initiating shutdown...");
+
+            Thread.currentThread().interrupt();
 
         } catch (Exception e) {
             logger.error("Failed to start MediaManager Core", e);
@@ -39,10 +124,9 @@ public class MediaManagerApplication {
 
     private static void loadConfiguration() throws IOException {
         config = new Properties();
-        try (InputStream input = MediaManagerApplication.class.getClassLoader()
+        try (InputStream input = MediaManagerApplication.class.getClassLoader().getResourceAsStream("config.properties")) {
-                .getResourceAsStream("application.properties")) {
             if (input == null) {
-                throw new IOException("Unable to find application.properties");
+                throw new IOException("Unable to find config.properties");
             }
             config.load(input);
             logger.info("Configuration loaded successfully");
@@ -52,4 +136,4 @@ public class MediaManagerApplication {
     public static Properties getConfig() {
         return config;
     }
-}
+}

src/main/java/com/mediamanager/mapper/ArtistMapper.java

@@ -0,0 +1,41 @@
+package com.mediamanager.mapper;
+
+import com.mediamanager.model.Artist;
+import com.mediamanager.protocol.messages.ArtistMessages;
+
+
+public class ArtistMapper {
+    public static ArtistMessages.Artist toProtobuf(Artist entity){
+        if (entity == null) {
+            return null;
+        }
+
+        String name = entity.getName();
+        if (name == null) {
+            throw new IllegalArgumentException("Artist name cannot be null");
+        }
+
+        ArtistMessages.Artist.Builder builder = ArtistMessages.Artist.newBuilder()
+                .setName(name);
+
+        // Only set ID when it's present and valid (> 0). Avoids NPE for null IDs.
+        Integer id = entity.getId();
+        if (id != null && id > 0) {
+            builder.setId(id);
+        }
+
+        return builder.build();
+    }
+    public static Artist toEntity(ArtistMessages.Artist protobuf) {
+        if (protobuf == null) {
+            return null;
+        }
+        Artist entity = new Artist();
+
+        if (protobuf.getId() > 0) {
+            entity.setId(protobuf.getId());
+        }
+        entity.setName(protobuf.getName());
+        return entity;
+    }
+}

src/main/java/com/mediamanager/mapper/BitDepthMapper.java

@@ -0,0 +1,39 @@
+package com.mediamanager.mapper;
+
+import com.mediamanager.model.BitDepth;
+import com.mediamanager.protocol.messages.BitDepthMessages;
+
+public class BitDepthMapper {
+    public static BitDepthMessages.BitDepth toProtobuf(BitDepth entity) {
+        if (entity == null){
+            return null;
+        }
+
+        String value = entity.getValue();
+        if (value == null) {
+            throw new IllegalArgumentException("Bit depth value cannot be null");
+        }
+        BitDepthMessages.BitDepth.Builder builder = BitDepthMessages.BitDepth.newBuilder()
+                .setValue(value);
+
+        Integer id = entity.getId();
+        if (id != null && id > 0) {
+            builder.setId(id);
+        }
+
+        return builder.build();
+    }
+
+    public static BitDepth toEntity(BitDepthMessages.BitDepth protobuf) {
+        if (protobuf == null) {
+            return null;
+        }
+        BitDepth entity = new BitDepth();
+
+        if (protobuf.getId() > 0) {
+            entity.setId(protobuf.getId());
+        }
+        entity.setValue(protobuf.getValue());
+        return entity;
+    }
+}

src/main/java/com/mediamanager/mapper/ComposerMapper.java

@@ -0,0 +1,38 @@
+package com.mediamanager.mapper;
+
+import com.mediamanager.model.Composer;
+import com.mediamanager.protocol.messages.ComposerMessages;
+
+public class ComposerMapper {
+    public static ComposerMessages.Composer toProtobuf(Composer entity) {
+        if (entity == null) {
+            return null;
+        }
+        ComposerMessages.Composer.Builder builder = ComposerMessages.Composer.newBuilder()
+                .setName(entity.getName());
+
+        Integer id = entity.getId();
+        if (id != null && id > 0) {
+            builder.setId(id);
+        }
+
+        return builder.build();
+
+    }
+
+    public static Composer toEntity(ComposerMessages.Composer protobuf) {
+        if (protobuf == null) {
+            return null;
+        }
+
+        Composer entity = new Composer();
+
+        if (protobuf.getId() > 0) {
+            entity.setId(protobuf.getId());
+        }
+
+        entity.setName(protobuf.getName());
+
+        return entity;
+    }
+}

src/main/java/com/mediamanager/mapper/GenreMapper.java

@@ -0,0 +1,40 @@
+package com.mediamanager.mapper;
+
+import com.mediamanager.model.Genre;
+import com.mediamanager.protocol.messages.GenreMessages;
+
+public class GenreMapper {
+    public static GenreMessages.Genre toProtobuf(Genre entity) {
+        if (entity == null) {
+            return null;
+        }
+
+        GenreMessages.Genre.Builder builder = GenreMessages.Genre.newBuilder()
+                .setName(entity.getName());
+
+        // Only set ID when it's present and valid (> 0). Avoids NPE for null IDs.
+        Integer id = entity.getId();
+        if (id != null && id > 0) {
+            builder.setId(id);
+        }
+
+        return builder.build();
+    }
+    public static Genre toEntity(GenreMessages.Genre protobuf) {
+        if (protobuf == null) {
+            return null;
+        }
+
+        Genre entity = new Genre();
+
+        // Só seta ID se for > 0 (protobuf default é 0)
+        if (protobuf.getId() > 0) {
+            entity.setId(protobuf.getId());
+        }
+
+        entity.setName(protobuf.getName());
+
+        return entity;
+    }
+}
+

src/main/java/com/mediamanager/model/Artist.java

@@ -0,0 +1,27 @@
+package com.mediamanager.model;
+
+import jakarta.persistence.*;
+
+@Entity
+@Table(name = "artist")
+public class Artist {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    @Column(nullable = false)
+    private String name;
+
+    public Integer getId() {
+        return id;
+    }
+    public void setId(Integer id) {
+        this.id = id;
+    }
+    public String getName() {
+        return name;
+    }
+    public void setName(String name) {
+        this.name = name;
+    }
+}

src/main/java/com/mediamanager/model/BitDepth.java

@@ -0,0 +1,32 @@
+package com.mediamanager.model;
+
+import jakarta.persistence.*;
+
+@Entity
+@Table(name = "bit_depth")
+public class BitDepth {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    @Column(nullable = false)
+    private String value;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+}
+

src/main/java/com/mediamanager/model/Composer.java

@@ -0,0 +1,31 @@
+package com.mediamanager.model;
+
+
+import jakarta.persistence.*;
+
+@Entity
+@Table(name = "composer")
+public class Composer {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    @Column(nullable = false)
+    private String name;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

src/main/java/com/mediamanager/model/Genre.java

@@ -0,0 +1,30 @@
+package com.mediamanager.model;
+
+import jakarta.persistence.*;
+
+@Entity
+@Table(name = "genre")
+public class Genre {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    @Column(nullable = false)
+    private String name;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

src/main/java/com/mediamanager/model/Media.java

@@ -1,128 +0,0 @@
-package com.mediamanager.model;
-
-import jakarta.persistence.*;
-import java.time.LocalDateTime;
-
-@Entity
-@Table(name = "media")
-public class Media {
-    
-    @Id
-    @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private Long id;
-    
-    @Column(nullable = false)
-    private String title;
-    
-    @Column(nullable = false, unique = true)
-    private String filePath;
-    
-    @Enumerated(EnumType.STRING)
-    @Column(nullable = false)
-    private MediaType type;
-    
-    @Column
-    private Long fileSize;
-    
-    @Column
-    private String mimeType;
-    
-    @Column(name = "created_at", nullable = false, updatable = false)
-    private LocalDateTime createdAt;
-    
-    @Column(name = "updated_at")
-    private LocalDateTime updatedAt;
-    
-    @PrePersist
-    protected void onCreate() {
-        createdAt = LocalDateTime.now();
-        updatedAt = LocalDateTime.now();
-    }
-    
-    @PreUpdate
-    protected void onUpdate() {
-        updatedAt = LocalDateTime.now();
-    }
-    
-    // Constructors
-    public Media() {}
-    
-    public Media(String title, String filePath, MediaType type) {
-        this.title = title;
-        this.filePath = filePath;
-        this.type = type;
-    }
-    
-    // Getters and Setters
-    public Long getId() {
-        return id;
-    }
-    
-    public void setId(Long id) {
-        this.id = id;
-    }
-    
-    public String getTitle() {
-        return title;
-    }
-    
-    public void setTitle(String title) {
-        this.title = title;
-    }
-    
-    public String getFilePath() {
-        return filePath;
-    }
-    
-    public void setFilePath(String filePath) {
-        this.filePath = filePath;
-    }
-    
-    public MediaType getType() {
-        return type;
-    }
-    
-    public void setType(MediaType type) {
-        this.type = type;
-    }
-    
-    public Long getFileSize() {
-        return fileSize;
-    }
-    
-    public void setFileSize(Long fileSize) {
-        this.fileSize = fileSize;
-    }
-    
-    public String getMimeType() {
-        return mimeType;
-    }
-    
-    public void setMimeType(String mimeType) {
-        this.mimeType = mimeType;
-    }
-    
-    public LocalDateTime getCreatedAt() {
-        return createdAt;
-    }
-    
-    public void setCreatedAt(LocalDateTime createdAt) {
-        this.createdAt = createdAt;
-    }
-    
-    public LocalDateTime getUpdatedAt() {
-        return updatedAt;
-    }
-    
-    public void setUpdatedAt(LocalDateTime updatedAt) {
-        this.updatedAt = updatedAt;
-    }
-    
-    public enum MediaType {
-        VIDEO,
-        AUDIO,
-        IMAGE,
-        DOCUMENT,
-        OTHER
-    }
-}

src/main/java/com/mediamanager/repository/ArtistRepository.java

@@ -0,0 +1,104 @@
+package com.mediamanager.repository;
+import com.mediamanager.model.Artist;
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.EntityManagerFactory;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+import java.util.Optional;
+
+public class ArtistRepository {
+    private static final Logger logger = LogManager.getLogger(ArtistRepository.class);
+
+    private final EntityManagerFactory entityManagerFactory;
+
+    public ArtistRepository(EntityManagerFactory entityManagerFactory) {
+        this.entityManagerFactory = entityManagerFactory;
+    }
+
+    public Artist save(Artist artist){
+        logger.debug("Saving Artist: {}", artist.getName());
+        EntityManager em = entityManagerFactory.createEntityManager();
+        em.getTransaction().begin();
+        try {
+            em.persist(artist);
+            em.getTransaction().commit();
+            logger.debug("Artist saved with ID: {}", artist.getId());
+            return artist;
+        } catch (Exception e) {
+            em.getTransaction().rollback();
+            logger.error("Error saving Artist", e);
+            throw e;
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    public List<Artist> findAll(){
+        logger.debug("Finding all Artists");
+        EntityManager em = entityManagerFactory.createEntityManager();
+        try {
+            return em
+                    .createQuery("SELECT a FROM Artist a ORDER BY a.name", Artist.class)
+                    .getResultList();
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    public Optional<Artist> findById(Integer id){
+        logger.debug("Finding artist by ID: {}", id);
+        EntityManager em = entityManagerFactory.createEntityManager();
+        try {
+            Artist artist = em.find(Artist.class, id);
+            return Optional.ofNullable(artist);
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+
+    }
+
+    public Artist update(Artist artist){
+        logger.debug("Updating artist ID: {}", artist.getId());
+        EntityManager em = entityManagerFactory.createEntityManager();
+        em.getTransaction().begin();
+        try {
+            Artist updated = em.merge(artist);
+            em.getTransaction().commit();
+            logger.debug("Artist updated successfully");
+            return updated;
+        } catch (Exception e) {
+            em.getTransaction().rollback();
+            logger.error("Error updating artist", e);
+            throw e;
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    public boolean deleteById(Integer id){
+        logger.debug("Deleting Artist by ID: {}", id);
+        EntityManager em = entityManagerFactory.createEntityManager();
+        em.getTransaction().begin();
+        try {
+            Artist artist = em.find(Artist.class, id);
+            if (artist == null) {
+                em.getTransaction().rollback();
+                return false;
+            }
+            em.remove(artist);
+            em.getTransaction().commit();
+            logger.debug("Artist deleted successfully");
+            return true;
+        } catch (Exception e) {
+            em.getTransaction().rollback();
+            logger.error("Error deleting artist", e);
+            throw e;
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+        }
+
+

src/main/java/com/mediamanager/repository/BitDepthRepository.java

@@ -0,0 +1,100 @@
+package com.mediamanager.repository;
+
+import com.mediamanager.model.BitDepth;
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.EntityManagerFactory;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+import java.util.Optional;
+
+public class BitDepthRepository {
+    private static final Logger logger = LogManager.getLogger(BitDepthRepository.class);
+
+    private final EntityManagerFactory entityManagerFactory;
+
+    public BitDepthRepository(EntityManagerFactory entityManagerFactory) {
+        this.entityManagerFactory = entityManagerFactory;
+    }
+
+    public BitDepth save(BitDepth bitDepth) {
+        logger.debug("Saving BitDepth: {}", bitDepth.getValue());
+        EntityManager em = entityManagerFactory.createEntityManager();
+        em.getTransaction().begin();
+        try {
+            em.persist(bitDepth);
+            em.getTransaction().commit();
+            logger.debug("BitDepth saved with ID: {}", bitDepth.getId());
+            return bitDepth;
+        } catch (Exception e) {
+            em.getTransaction().rollback();
+            logger.error("Error saving BitDepth", e);
+            throw e;
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    public List<BitDepth> findAll(){
+        logger.debug("Finding all BitDepths");
+        EntityManager em = entityManagerFactory.createEntityManager();
+        try{
+            return em.createQuery("SELECT b FROM BitDepth b ORDER BY b.value", BitDepth.class).getResultList();
+        }finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    public Optional<BitDepth> findById(Integer id){
+        logger.debug("Finding BitDepth by ID: {}", id);
+        EntityManager em = entityManagerFactory.createEntityManager();
+        try{
+            BitDepth bitDepth = em.find(BitDepth.class, id);
+            return Optional.ofNullable(bitDepth);
+        }finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    public BitDepth update(BitDepth bitDepth){
+        logger.debug("Updating BitDepth ID: {}", bitDepth.getId());
+        EntityManager em = entityManagerFactory.createEntityManager();
+        em.getTransaction().begin();
+        try{
+            BitDepth updated = em.merge(bitDepth);
+            em.getTransaction().commit();
+            logger.debug("BitDepth updated successfully");
+            return updated;
+        }catch (Exception e){
+            em.getTransaction().rollback();
+            logger.error("Error updating BitDepth", e);
+            throw e;
+        }finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    public boolean deleteById(Integer id){
+        logger.debug("Deleting BitDepth by ID: {}", id);
+        EntityManager em = entityManagerFactory.createEntityManager();
+        em.getTransaction().begin();
+        try{
+           BitDepth bitDepth = em.find(BitDepth.class, id);
+           if (bitDepth == null) {
+               em.getTransaction().rollback();
+               return false;
+           }
+           em.remove(bitDepth);
+           em.getTransaction().commit();
+           logger.debug("BitDepth deleted successfully");
+           return true;
+        } catch (Exception e) {
+            em.getTransaction().rollback();
+            logger.error("Error deleting BitDepth", e);
+            throw e;
+        }finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+}

src/main/java/com/mediamanager/repository/ComposerRepository.java

@@ -0,0 +1,102 @@
+package com.mediamanager.repository;
+
+import com.mediamanager.model.Composer;
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.EntityManagerFactory;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+import java.util.Optional;
+
+public class ComposerRepository {
+    private static final Logger logger = LogManager.getLogger(ComposerRepository.class);
+
+    private final EntityManagerFactory entityManagerFactory;
+
+    public ComposerRepository(EntityManagerFactory entityManagerFactory) {
+        this.entityManagerFactory = entityManagerFactory;
+    }
+
+    public Composer save(Composer composer) {
+        logger.debug("Saving composer: {}", composer.getName());
+        EntityManager em = entityManagerFactory.createEntityManager();
+        em.getTransaction().begin();
+        try{
+            //ToDo: Add Id Validation
+            //ToDo: Add to all Repositories
+            em.persist(composer);
+            em.getTransaction().commit();
+            logger.debug("Composer saved with IS: {}", composer.getId());
+            return composer;
+        } catch (Exception e) {
+            em.getTransaction().rollback();
+            logger.error("Error saving composer", e);
+            throw e;
+        }finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    public List<Composer> findAll(){
+        logger.debug("Finding all composers");
+        EntityManager em = entityManagerFactory.createEntityManager();
+        try{
+            return em.createQuery("SELECT c FROM Composer c ORDER BY c.name", Composer.class).getResultList();
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    public Optional<Composer> findById(Integer id){
+        logger.debug("Finding composer by ID: {}", id);
+        EntityManager em = entityManagerFactory.createEntityManager();
+        try{
+            Composer composer = em.find(Composer.class, id);
+            return Optional.ofNullable(composer);
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    public Composer update(Composer composer){
+        logger.debug("Updating composer ID: {}", composer.getId());
+        EntityManager em = entityManagerFactory.createEntityManager();
+        em.getTransaction().begin();
+        try{
+            Composer updated = em.merge(composer);
+            em.getTransaction().commit();
+            logger.debug("Composer updated successfully");
+            return updated;
+        } catch (Exception e) {
+            em.getTransaction().rollback();
+            logger.error("Error updating composer", e);
+            throw e;
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    public boolean deleteById(Integer id){
+        logger.debug("Deleting composer by ID: {}", id);
+        EntityManager em = entityManagerFactory.createEntityManager();
+        em.getTransaction().begin();
+        try{
+           Composer composer = em.find(Composer.class, id);
+           if (composer == null) {
+               em.getTransaction().rollback();
+               return false;
+           }
+           em.remove(composer);
+           em.getTransaction().commit();
+           logger.debug("Composer deleted successfully");
+           return true;
+        } catch (Exception e) {
+            em.getTransaction().rollback();
+            logger.error("Error deleting composer", e);
+            throw e;
+        }finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+}

src/main/java/com/mediamanager/repository/GenreRepository.java

@@ -0,0 +1,121 @@
+package com.mediamanager.repository;
+
+import com.mediamanager.model.Genre;
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.EntityManagerFactory;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+import java.util.Optional;
+
+/**
+ * Repository para acesso a dados de Genre
+ * Encapsula todas as operações de banco de dados
+ */
+public class GenreRepository {
+    private static final Logger logger = LogManager.getLogger(GenreRepository.class);
+
+    private final EntityManagerFactory entityManagerFactory;
+
+    public GenreRepository(EntityManagerFactory entityManagerFactory) {
+        this.entityManagerFactory = entityManagerFactory;
+    }
+
+    /**
+     * Salva um novo genre
+     */
+    public Genre save(Genre genre) {
+        logger.debug("Saving genre: {}", genre.getName());
+        EntityManager em = entityManagerFactory.createEntityManager();
+        em.getTransaction().begin();
+        try {
+            em.persist(genre);
+            em.getTransaction().commit();
+            logger.debug("Genre saved with ID: {}", genre.getId());
+            return genre;
+        } catch (Exception e) {
+            em.getTransaction().rollback();
+            logger.error("Error saving genre", e);
+            throw e;
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    /**
+     * Busca todos os genres
+     */
+    public List<Genre> findAll() {
+        logger.debug("Finding all genres");
+        EntityManager em = entityManagerFactory.createEntityManager();
+        try {
+            return em
+                    .createQuery("SELECT g FROM Genre g ORDER BY g.name", Genre.class)
+                    .getResultList();
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    /**
+     * Busca genre por ID
+     */
+    public Optional<Genre> findById(Integer id) {
+        logger.debug("Finding genre by ID: {}", id);
+        EntityManager em = entityManagerFactory.createEntityManager();
+        try {
+            Genre genre = em.find(Genre.class, id);
+            return Optional.ofNullable(genre);
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    /**
+     * Atualiza um genre existente
+     */
+    public Genre update(Genre genre) {
+        logger.debug("Updating genre ID: {}", genre.getId());
+        EntityManager em = entityManagerFactory.createEntityManager();
+        em.getTransaction().begin();
+        try {
+            Genre updated = em.merge(genre);
+            em.getTransaction().commit();
+            logger.debug("Genre updated successfully");
+            return updated;
+        } catch (Exception e) {
+            em.getTransaction().rollback();
+            logger.error("Error updating genre", e);
+            throw e;
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+
+    /**
+     * Deleta um genre por ID
+     */
+    public boolean deleteById(Integer id) {
+        logger.debug("Deleting genre by ID: {}", id);
+        EntityManager em = entityManagerFactory.createEntityManager();
+        em.getTransaction().begin();
+        try {
+            Genre genre = em.find(Genre.class, id);
+            if (genre == null) {
+                em.getTransaction().rollback();
+                return false;
+            }
+            em.remove(genre);
+            em.getTransaction().commit();
+            logger.debug("Genre deleted successfully");
+            return true;
+        } catch (Exception e) {
+            em.getTransaction().rollback();
+            logger.error("Error deleting genre", e);
+            throw e;
+        } finally {
+            if (em.isOpen()) em.close();
+        }
+    }
+}

src/main/java/com/mediamanager/service/artist/ArtistService.java

@@ -0,0 +1,65 @@
+package com.mediamanager.service.artist;
+
+import com.mediamanager.model.Artist;
+import com.mediamanager.repository.ArtistRepository;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+import java.util.Optional;
+
+public class ArtistService {
+    private static final Logger logger = LogManager.getLogger(ArtistService.class);
+    private final ArtistRepository artistRepository;
+
+    public ArtistService(ArtistRepository artistRepository) {
+        this.artistRepository = artistRepository;
+    }
+
+    public Artist createArtist(String name){
+        logger.info("Creating artist: {}", name);
+        if (name == null || name.trim().isEmpty()) {
+            throw new IllegalArgumentException("Artist name cannot be empty");
+        }
+        Artist artist = new Artist();
+        artist.setName(name.trim());
+        return artistRepository.save(artist);
+    }
+
+    public List<Artist> getAllArtists(){
+        logger.info("Getting all artists");
+        return artistRepository.findAll();
+    }
+
+    public Optional<Artist> getArtistById(Integer id){
+        logger.info("Getting artist by ID: {}", id);
+        return artistRepository.findById(id);
+    }
+
+    public Optional<Artist> updateArtist(Integer id, String name){
+        logger.info("Updating artist ID {}: {}", id, name);
+
+        if (name == null || name.trim().isEmpty()) {
+            throw new IllegalArgumentException("Artist name cannot be empty");
+        }
+
+        Optional<Artist> existingArtist = artistRepository.findById(id);
+
+        if(existingArtist.isEmpty()){
+            logger.warn("Artist not found with ID: {}", id);
+            return Optional.empty();
+        }
+        Artist artist = existingArtist.get();
+        artist.setName(name.trim());
+        Artist updatedArtist = artistRepository.update(artist);
+        return Optional.of(updatedArtist);
+    }
+
+    public boolean deleteArtist(Integer id){
+        logger.info("Deleting artist ID: {}", id);
+        return artistRepository.deleteById(id);
+    }
+
+
+
+}

src/main/java/com/mediamanager/service/bitdepth/BitDepthService.java

@@ -0,0 +1,61 @@
+package com.mediamanager.service.bitdepth;
+
+import com.mediamanager.model.BitDepth;
+import com.mediamanager.repository.BitDepthRepository;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+import java.util.Optional;
+
+public class BitDepthService {
+    private static final Logger logger = LogManager.getLogger(BitDepthService.class);
+    private final BitDepthRepository bitDepthRepository;
+
+    public BitDepthService(BitDepthRepository bitDepthRepository) {
+        this.bitDepthRepository = bitDepthRepository;
+    }
+    public BitDepth createBitDepth(String value){
+        logger.info("Creating bit-depth: {}", value);
+        if (value == null || value.trim().isEmpty()) {
+            throw new IllegalArgumentException("Bit-depth value cannot be empty");
+        }
+        BitDepth bitDepth = new BitDepth();
+        bitDepth.setValue(value.trim());
+        return bitDepthRepository.save(bitDepth);
+
+    }
+
+    public List<BitDepth> getAllBitDepths(){
+        logger.info("Getting all bit-depths");
+        return bitDepthRepository.findAll();
+    }
+
+    public Optional<BitDepth> getBitDepthById(Integer id){
+        logger.info("Getting bit-depth by ID: {}", id);
+        return bitDepthRepository.findById(id);
+    }
+
+    public Optional<BitDepth> updateBitDepth(Integer id, String value){
+        logger.info("Updating bit-depth ID {}: {}", id, value);
+
+        if (value == null || value.trim().isEmpty()) {
+            throw new IllegalArgumentException("Bit-depth value cannot be empty");
+        }
+        Optional<BitDepth> existingBitDepth = bitDepthRepository.findById(id);
+        if(existingBitDepth.isEmpty()){
+            logger.warn("Bit-depth not found with ID: {}", id);
+            return Optional.empty();
+        }
+        BitDepth bitDepth = existingBitDepth.get();
+        bitDepth.setValue(value.trim());
+        BitDepth updatedBitDepth = bitDepthRepository.update(bitDepth);
+        return Optional.of(updatedBitDepth);
+
+    }
+
+    public boolean deleteBitDepth(Integer id){
+        logger.info("Deleting bit-depth ID: {}", id);
+        return bitDepthRepository.deleteById(id);
+    }
+}

src/main/java/com/mediamanager/service/composer/ComposerService.java

@@ -0,0 +1,70 @@
+package com.mediamanager.service.composer;
+
+import com.mediamanager.model.Composer;
+import com.mediamanager.repository.ComposerRepository;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+import java.util.Optional;
+
+public class ComposerService {
+    private static final Logger logger = LogManager.getLogger(ComposerService.class);
+
+    private final ComposerRepository composerRepository;
+
+    public ComposerService(ComposerRepository composerRepository) {
+        this.composerRepository = composerRepository;
+    }
+
+    public Composer createComposer(String name) {
+        logger.info("Creating composer: {}", name);
+        if(name == null || name.trim().isEmpty()) {
+            throw new IllegalArgumentException("Composer name cannot be empty");
+        }
+        Composer composer = new Composer();
+        composer.setName(name.trim());
+        return composerRepository.save(composer);
+
+
+    }
+
+    public List<Composer> getAllComposers() {
+        logger.info("Getting all composers");
+        return composerRepository.findAll();
+    }
+
+    public Optional<Composer> getComposerById(Integer id) {
+        logger.info("Getting composer by ID: {}", id);
+        return composerRepository.findById(id);
+    }
+
+    public Optional<Composer> updateComposer(Integer id, String name) {
+        logger.info("Updating composer ID {}: {}", id, name);
+
+        if(name == null || name.trim().isEmpty()) {
+            throw new IllegalArgumentException("Composer name cannot be empty");
+        }
+
+        Optional<Composer> existingComposer = composerRepository.findById(id);
+
+        if(existingComposer.isEmpty()) {
+            logger.warn("Composer not found with ID: {}", id);
+            return Optional.empty();
+        }
+
+        Composer composer = existingComposer.get();
+        composer.setName(name.trim());
+
+        Composer updated = composerRepository.update(composer);
+        return Optional.of(updated);
+
+    }
+
+    public boolean deleteComposer(Integer id) {
+        logger.info("Deleting composer ID: {}", id);
+        return composerRepository.deleteById(id);
+    }
+
+
+}

src/main/java/com/mediamanager/service/database/DatabaseManager.java

@@ -0,0 +1,142 @@
+package com.mediamanager.service.database;
+
+import jakarta.persistence.EntityManagerFactory;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.hibernate.cfg.Configuration;
+import org.reflections.Reflections;
+import org.reflections.scanners.Scanners;
+import jakarta.persistence.Entity;
+import java.util.Set;
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.Properties;
+
+
+public abstract class DatabaseManager {
+    protected final Properties configuration;
+    protected Connection connection;
+    protected String connectionUrl;
+    protected EntityManagerFactory entityManagerFactory;
+    protected static final Logger logger = LogManager.getLogger(DatabaseManager.class);
+
+    public DatabaseManager(Properties config) {
+        this.configuration = config;
+        logger.debug("DatabaseManager created with configuration:");
+    }
+
+    public abstract void init() throws Exception;
+
+    protected abstract Connection createConnection() throws Exception;
+
+    protected void performSanityChecks() throws SQLException {
+        logger.debug("Performing sanity checks...");
+        try (Statement stmt = connection.createStatement()) {
+            stmt.execute("SELECT 1");
+
+        }
+        String databaseProductName = connection.getMetaData().getDatabaseProductName();
+        String databaseProductVersion = connection.getMetaData().getDatabaseProductVersion();
+        logger.info("Connected to database: {} v{}", databaseProductName, databaseProductVersion);
+    }
+
+    public Connection getConnection() {
+        return connection;
+    }
+
+    public void close() {
+        if (entityManagerFactory != null && entityManagerFactory.isOpen()) {
+            try {
+                entityManagerFactory.close();
+                logger.info("EntityManagerFactory closed");
+            } catch (Exception e) {
+                logger.error("Error closing EntityManagerFactory: {}", e.getMessage());
+            }
+        }
+        if (connection != null) {
+            try {
+                logger.info("Closing database connection...");
+                connection.close();
+                logger.info("Database connection closed successfully");
+            } catch (SQLException e) {
+                logger.error("Error closing database connection: {}", e.getMessage());
+            }
+        } else {
+            logger.debug("No database connection to close");
+        }
+    }
+
+    protected boolean testConnection() {
+        try (Statement stmt = connection.createStatement()) {
+            stmt.execute("SELECT 1");
+            return true;
+        } catch (SQLException e) {
+            logger.error("Connection test failed", e);
+            return false;
+        }
+    }
+    protected void initializeHibernate() {
+        logger.info("Initializing Hibernate ORM...");
+
+        Configuration hibernateConfig = new Configuration();
+
+
+        String dialect = configuration.getProperty("hibernate.dialect");
+        String hbm2ddl = configuration.getProperty("hibernate.hbm2ddl.auto");
+        String driver = configuration.getProperty("database.driver");
+
+        if (dialect == null || dialect.isEmpty()) {
+            throw new IllegalStateException("hibernate.dialect property is required but not configured");
+        }
+        if (driver == null || driver.isEmpty()) {
+            throw new IllegalStateException("database.driver property is required but not configured");
+        }
+        if (connectionUrl == null || connectionUrl.isEmpty()) {
+             throw new IllegalStateException("connectionUrl must be set before initializing Hibernate");
+        }
+
+
+        hibernateConfig.setProperty("hibernate.connection.url", connectionUrl);
+        hibernateConfig.setProperty("hibernate.connection.driver_class", driver);
+        hibernateConfig.setProperty("hibernate.dialect", dialect);
+        hibernateConfig.setProperty("hibernate.hbm2ddl.auto", hbm2ddl);
+        hibernateConfig.setProperty("hibernate.show_sql",
+                configuration.getProperty("hibernate.show_sql", "false"));
+        hibernateConfig.setProperty("hibernate.format_sql",
+                configuration.getProperty("hibernate.format_sql", "true"));
+
+        logger.info("Scanning for entities in package: com.mediamanager.model");
+
+        Set<Class<?>> entityClasses;
+        try {
+            Reflections reflections = new Reflections("com.mediamanager.model", Scanners.TypesAnnotated);
+            entityClasses = reflections.getTypesAnnotatedWith(Entity.class);
+            } catch (Exception e) {
+            logger.error("Failed to scan for entities: {}", e.getMessage());
+            throw new RuntimeException("Entity scanning failed", e);
+            }
+
+        logger.info("Found {} entities", entityClasses.size());
+        if (entityClasses.isEmpty()) {
+            logger.warn("No @Entity classes found in package com.mediamanager.model - is this expected?");
+        }
+        for (Class<?> entityClass : entityClasses) {
+            logger.debug("Registering entity: {}", entityClass.getSimpleName());
+            hibernateConfig.addAnnotatedClass(entityClass);
+        }
+
+        try {
+            entityManagerFactory = hibernateConfig.buildSessionFactory().unwrap(EntityManagerFactory.class);
+            } catch (Exception e) {
+            logger.error("Failed to initialize Hibernate: {}", e.getMessage());
+            throw new RuntimeException("Hibernate initialization failed", e);
+            }
+
+        logger.info("Hibernate ORM initialized successfully");
+    }
+
+    public EntityManagerFactory getEntityManagerFactory() {
+        return entityManagerFactory;
+    }
+}

src/main/java/com/mediamanager/service/database/SqliteDatabaseManager.java

@@ -0,0 +1,99 @@
+package com.mediamanager.service.database;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.Properties;
+
+public class SqliteDatabaseManager extends DatabaseManager {
+    private static final Logger logger = LogManager.getLogger(SqliteDatabaseManager.class);
+
+
+
+
+    public SqliteDatabaseManager(Properties config) {
+        super(config);
+    }
+
+        @Override
+        public void init() throws Exception {
+
+            logger.info("Initializing SQLite database...");
+            String dataDir = configuration.getProperty("database.dir",
+                    System.getProperty("user.home") + "/.mediamanager/db");
+            String dbFilename = configuration.getProperty("database.filename", "mediamanager.db");
+            String driverClassName = configuration.getProperty("database.driver", "org.sqlite.JDBC");
+            try {
+                Class.forName(driverClassName);
+            }catch(ClassNotFoundException e) {
+                logger.error("Failed to load SQLite driver", e);
+                throw e;
+            }
+            Path dataPath = Paths.get(dataDir);
+            if (!Files.exists(dataPath)) {
+                Files.createDirectories(dataPath);
+                logger.debug("Created database directory: {}", dataDir);
+            }
+            Path dbFile = dataPath.resolve(dbFilename);
+            this.connectionUrl = "jdbc:sqlite:" + dbFile.toAbsolutePath().toString();
+            logger.info("Database file path: {}", dbFile);
+            logger.info("Connection URL: {}", this.connectionUrl);
+            initializeHibernate();
+            this.connection = createConnection();
+            configurePerformancePragmas();
+            performSanityChecks();
+            ensureSchemaExists();
+            logger.info("SQLite database initialized successfully");
+
+
+    }
+
+    @Override
+    protected Connection createConnection() throws Exception {
+        try {
+            // O driver org.xerial.sqlite-jdbc é carregado automaticamente aqui
+            Connection conn = DriverManager.getConnection(this.connectionUrl);
+            logger.debug("Got connection to SQLite file");
+            return conn;
+        } catch (SQLException e) {
+            logger.error("Failed to create SQLite connection", e);
+            throw new Exception("SQLite connection failed: " + e.getMessage(), e);
+        }
+    }
+
+
+    private void configurePerformancePragmas() throws SQLException {
+        try (Statement stmt = connection.createStatement()) {
+
+            stmt.execute("PRAGMA journal_mode=WAL;");
+
+
+            stmt.execute("PRAGMA foreign_keys=ON;");
+
+
+            stmt.execute("PRAGMA synchronous=NORMAL;");
+
+            stmt.execute("PRAGMA busy_timeout=5000;");
+
+            logger.debug("SQLite performance PRAGMAs applied (WAL, Synchronous, ForeignKeys).");
+        }
+    }
+
+    private void ensureSchemaExists() throws SQLException {
+
+    }
+
+    @Override
+    public void close() {
+
+        super.close();
+        logger.info("SQLite resources released.");
+    }
+}

src/main/java/com/mediamanager/service/delegate/ActionHandler.java

@@ -0,0 +1,11 @@
+package com.mediamanager.service.delegate;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.protocol.TransportProtocol;
+
+@FunctionalInterface
+public interface ActionHandler {
+    TransportProtocol.Response.Builder handle(ByteString requestPayload) throws InvalidProtocolBufferException;
+}
+

src/main/java/com/mediamanager/service/delegate/DelegateActionManager.java

@@ -0,0 +1,218 @@
+package com.mediamanager.service.delegate;
+
+import com.google.protobuf.ByteString;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.repository.*;
+import com.mediamanager.service.bitdepth.BitDepthService;
+import com.mediamanager.service.composer.ComposerService;
+import com.mediamanager.repository.GenreRepository;
+import com.mediamanager.service.artist.ArtistService;
+import com.mediamanager.service.delegate.annotation.Action;
+
+import com.mediamanager.service.genre.GenreService;
+import jakarta.persistence.EntityManagerFactory;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.reflections.Reflections;
+import org.reflections.scanners.Scanners;
+import java.lang.reflect.Constructor;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+public class DelegateActionManager {
+    private static final Logger logger = LogManager.getLogger(DelegateActionManager.class);
+    
+    private final Map<String, ActionHandler> handlerRegistry;
+    private final ServiceLocator serviceLocator;
+    private final EntityManagerFactory entityManagerFactory;
+
+
+    public DelegateActionManager(EntityManagerFactory entityManagerFactory) {
+        this.entityManagerFactory = entityManagerFactory;
+        this.serviceLocator = new ServiceLocator();
+
+        initializeServices();
+
+
+        logger.debug("DelegateActionManager created");
+        this.handlerRegistry = new HashMap<>();
+        autoRegisterHandlers();
+
+    }
+
+    private void initializeServices() {
+        logger.info("Initializing services...");
+
+
+        GenreRepository genreRepository = new GenreRepository(entityManagerFactory);
+        GenreService genreService = new GenreService(genreRepository);
+
+
+        serviceLocator.register(GenreService.class, genreService);
+
+        ArtistRepository artistRepository = new ArtistRepository(entityManagerFactory);
+        ArtistService artistService = new ArtistService(artistRepository);
+
+        serviceLocator.register(ArtistService.class, artistService);
+
+        ComposerRepository composerRepository = new ComposerRepository(entityManagerFactory);
+        ComposerService composerService = new ComposerService(composerRepository);
+        serviceLocator.register(ComposerService.class, composerService);
+
+        BitDepthRepository bitDepthRepository = new BitDepthRepository(entityManagerFactory);
+        BitDepthService bitDepthService = new BitDepthService(bitDepthRepository);
+        serviceLocator.register(BitDepthService.class, bitDepthService);
+
+        serviceLocator.logRegisteredServices();
+
+        logger.info("Services initialized successfully");
+    }
+
+
+
+    public void start(){
+        logger.info("DelegateActionManager started");
+    }
+
+    public void stop(){
+        logger.info("DelegateActionManager stopped");
+    }
+
+    @SuppressWarnings("unchecked")
+    private ActionHandler instantiateHandler(Class<?> clazz) throws Exception {
+        if(!ActionHandler.class.isAssignableFrom(clazz)){
+            throw new IllegalArgumentException(
+                    clazz.getName() + " is annotated with @Action but does not implement ActionHandler");
+
+        }
+        logger.debug("Attempting to instantiate handler: {}", clazz.getSimpleName());
+
+
+        Constructor<?>[] constructors = clazz.getDeclaredConstructors();
+
+
+        // Sort constructors by parameter count (descending) to prefer DI constructors
+        java.util.Arrays.sort(constructors, (c1, c2) -> 
+            Integer.compare(c2.getParameterCount(), c1.getParameterCount()));
+
+        for (Constructor<?> constructor : constructors) {
+
+            Class<?>[] paramTypes = constructor.getParameterTypes();
+
+
+            Object[] params = new Object[paramTypes.length];
+            boolean allDependenciesResolved = true;
+
+            for (int i = 0; i < paramTypes.length; i++) {
+
+                Object service = serviceLocator.get(paramTypes[i]);
+
+                if (service == null) {
+
+                    allDependenciesResolved = false;
+                    logger.debug("Cannot resolve dependency {} for {}",
+                            paramTypes[i].getSimpleName(),
+                            clazz.getSimpleName());
+                    break;  // Para de tentar esse construtor
+                }
+
+
+                params[i] = service;
+            }
+
+
+            if (allDependenciesResolved) {
+                logger.debug("Using constructor with {} params for {}",
+                        paramTypes.length, clazz.getSimpleName());
+                return (ActionHandler) constructor.newInstance(params);
+            }
+        }
+
+
+        throw new IllegalStateException(
+                String.format(
+                        "Cannot instantiate handler %s. No suitable constructor found. " +
+                                "Make sure all required services are registered in ServiceLocator.",
+                        clazz.getName()
+                )
+        );
+    }
+
+    private void autoRegisterHandlers() {
+        logger.info("Starting auto-registration of handlers...");
+        Reflections reflections = new Reflections(
+                "com.mediamanager.service.delegate.handler",
+                Scanners.TypesAnnotated
+        );
+        Set<Class<?>> annotatedClasses = reflections.getTypesAnnotatedWith(Action.class);
+        logger.info("Found {} handler classes with @Action annotation", annotatedClasses.size());
+        int successCount = 0;
+        int failureCount = 0;
+        for (Class<?> handlerClass : annotatedClasses) {
+            try {
+
+                Action actionAnnotation = handlerClass.getAnnotation(Action.class);
+                String actionName = actionAnnotation.value();
+
+                logger.debug("Processing handler: {} for action '{}'",
+                        handlerClass.getSimpleName(),
+                        actionName);
+
+
+                ActionHandler handler = instantiateHandler(handlerClass);
+
+
+                handlerRegistry.put(actionName, handler);
+
+                logger.info("✓ Registered handler: '{}' -> {}",
+                        actionName,
+                        handlerClass.getSimpleName());
+                successCount++;
+
+            } catch (Exception e) {
+
+                logger.error("✗ Failed to register handler: {}",
+                        handlerClass.getName(),
+                        e);
+                failureCount++;
+            }
+        }
+
+
+        logger.info("Auto-registration complete: {} successful, {} failed, {} total",
+                successCount,
+                failureCount,
+                successCount + failureCount);
+
+        if (failureCount > 0) {
+            logger.warn("Some handlers failed to register. Check logs above for details.");
+        }
+    }
+
+    public TransportProtocol.Response ProcessedRequest(TransportProtocol.Request request){
+        String requestId = request.getRequestId();
+        logger.info("Processing request: {}", requestId);
+        String action = request.getHeadersMap().getOrDefault("action", "unknown");
+        ActionHandler handler = handlerRegistry.get(action);
+        TransportProtocol.Response.Builder responseBuilder;
+        if (handler == null) {
+            logger.warn("No handler found for action: {}", action);
+            responseBuilder = TransportProtocol.Response.newBuilder()
+                    .setStatusCode(404) // 404 Not Found
+                    .setPayload(ByteString.copyFromUtf8("Error: Action '" + action + "' not found."));
+        } else{
+            try {
+                logger.debug("Delegating action '{}' to handler...", action);
+                responseBuilder = handler.handle(request.getPayload());
+            }catch (Exception e) {
+                logger.error("Handler for action '{}' threw an exception:", action, e);
+                responseBuilder = TransportProtocol.Response.newBuilder()
+                        .setStatusCode(500) // 500 Internal Server Error
+                        .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+            }
+        }
+            return responseBuilder.setRequestId(requestId).build();
+    }
+}

src/main/java/com/mediamanager/service/delegate/ServiceLocator.java

@@ -0,0 +1,45 @@
+package com.mediamanager.service.delegate;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class ServiceLocator {
+    private static final Logger logger = LogManager.getLogger(ServiceLocator.class);
+    private final Map<Class<?>, Object> services = new HashMap<>();
+
+    public <T> void register(Class<T> serviceClass, T serviceInstance) {
+        if (serviceInstance == null) {
+            throw new IllegalArgumentException("Service instance cannot be null");
+        }
+        services.put(serviceClass, serviceInstance);
+        logger.debug("Registered service: {} -> {}",
+                serviceClass.getSimpleName(),
+                serviceInstance.getClass().getSimpleName());
+    }
+
+    @SuppressWarnings("unchecked")
+    public <T> T get(Class<T> serviceClass) {
+        return (T) services.get(serviceClass);
+    }
+
+    public boolean has(Class<?> serviceClass) {
+        return services.containsKey(serviceClass);
+    }
+    public int size() {
+        return services.size();
+    }
+    public void logRegisteredServices() {
+        logger.info("Registered services: {}", services.size());
+
+
+        services.forEach((clazz, instance) ->
+                logger.info("  - {} -> {}",
+                        clazz.getSimpleName(),
+                        instance.getClass().getSimpleName())
+        );
+    }
+}
+

src/main/java/com/mediamanager/service/delegate/annotation/Action.java

@@ -0,0 +1,13 @@
+package com.mediamanager.service.delegate.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+public @interface Action {
+
+    String value();
+}

src/main/java/com/mediamanager/service/delegate/handler/CloseHandler.java

@@ -0,0 +1,34 @@
+package com.mediamanager.service.delegate.handler;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.protocol.TestProtocol.CloseCommand;
+import com.mediamanager.protocol.TestProtocol.CloseResponse;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+@Action("close")
+public class CloseHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(CloseHandler.class);
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+
+        CloseCommand.parseFrom(requestPayload); // Valida
+
+        logger.info("Close command received - connection will close");
+
+        CloseResponse response = CloseResponse.newBuilder()
+                .setMessage("Connection closing. Goodbye!")
+                .build();
+
+        return TransportProtocol.Response.newBuilder()
+                .setPayload(ByteString.copyFrom(response.toByteArray()))
+                .setStatusCode(200)
+                .putHeaders("Connection", "close"); // ← Marca para fechar
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/EchoHandler.java

@@ -0,0 +1,41 @@
+package com.mediamanager.service.delegate.handler;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.protocol.TestProtocol.EchoCommand;      // ← Import
+import com.mediamanager.protocol.TestProtocol.EchoResponse;    // ← Import
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+@Action("echo")
+public class EchoHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(EchoHandler.class);
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {  // ← Pode lançar exceção
+
+        // 1. Parse Protobuf bytes → EchoCommand
+        EchoCommand command = EchoCommand.parseFrom(requestPayload);
+
+        logger.debug("Echo received: {}", command.getMessage());
+
+        // 2. Cria EchoResponse (Protobuf)
+        EchoResponse echoResponse = EchoResponse.newBuilder()
+                .setMessage(command.getMessage())
+                .setServerTimestamp(System.currentTimeMillis())
+                .build();
+
+        // 3. Serializa EchoResponse → bytes
+        ByteString responsePayload = ByteString.copyFrom(echoResponse.toByteArray());
+
+        // 4. Retorna Response
+        return TransportProtocol.Response.newBuilder()
+                .setPayload(responsePayload)
+                .setStatusCode(200);
+
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/HeartbeatHandler.java

@@ -0,0 +1,38 @@
+package com.mediamanager.service.delegate.handler;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.protocol.TestProtocol.HeartbeatCommand;
+import com.mediamanager.protocol.TestProtocol.HeartbeatResponse;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+@Action("heartbeat")
+public class HeartbeatHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(HeartbeatHandler.class);
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+
+        HeartbeatCommand command = HeartbeatCommand.parseFrom(requestPayload);
+
+        long serverTime = System.currentTimeMillis();
+
+        logger.debug("Heartbeat received. Client T1={}, Server T2={}",
+                command.getClientTimestamp(), serverTime);
+
+        HeartbeatResponse response = HeartbeatResponse.newBuilder()
+                .setClientTimestamp(command.getClientTimestamp())  // Echo T1
+                .setServerTimestamp(serverTime)                     // T2
+                .build();
+
+        return TransportProtocol.Response.newBuilder()
+                .setPayload(ByteString.copyFrom(response.toByteArray()))
+                .setStatusCode(200);
+
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/artist/CreateArtistHandler.java

@@ -0,0 +1,50 @@
+package com.mediamanager.service.delegate.handler.artist;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.ArtistMapper;
+import com.mediamanager.model.Artist;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.ArtistMessages;
+import com.mediamanager.service.artist.ArtistService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+@Action("artist.create")
+public class CreateArtistHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(CreateArtistHandler.class);
+    private final ArtistService artistService;
+
+    public CreateArtistHandler(ArtistService artistService) {
+        this.artistService = artistService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload) throws InvalidProtocolBufferException {
+        try{
+            ArtistMessages.CreateArtistRequest createRequest =
+                    ArtistMessages.CreateArtistRequest.parseFrom(requestPayload);
+            Artist artist = artistService.createArtist(createRequest.getName());
+            ArtistMessages.Artist artistProto = ArtistMapper.toProtobuf(artist);
+            ArtistMessages.CreateArtistResponse createArtistResponse = ArtistMessages.CreateArtistResponse.newBuilder()
+                    .setArtist(artistProto)
+                    .build();
+            return TransportProtocol.Response.newBuilder()
+                    .setPayload(createArtistResponse.toByteString());
+        } catch (IllegalArgumentException e) {
+            logger.error("Validation error", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(400)
+                    .setPayload(ByteString.copyFromUtf8("Validation error: " + e.getMessage()));
+
+        } catch (Exception e) {
+            logger.error("Error creating artist", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+    }
+}
+

src/main/java/com/mediamanager/service/delegate/handler/artist/DeleteArtistHandler.java

@@ -0,0 +1,62 @@
+package com.mediamanager.service.delegate.handler.artist;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.ArtistMessages;
+import com.mediamanager.service.artist.ArtistService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+@Action("artist.delete")
+public class DeleteArtistHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(DeleteArtistHandler.class);
+
+    private final ArtistService artistService;
+
+    public DeleteArtistHandler(ArtistService artistService) {
+        this.artistService = artistService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+
+        try {
+            ArtistMessages.DeleteArtistRequest deleteRequest =
+                    ArtistMessages.DeleteArtistRequest.parseFrom(requestPayload);
+            int id = deleteRequest.getId();
+            boolean success = artistService.deleteArtist(id);
+            ArtistMessages.DeleteArtistResponse deleteResponse;
+            if (success) {
+                deleteResponse = ArtistMessages.DeleteArtistResponse.newBuilder()
+                        .setSuccess(true)
+                        .setMessage("Artist deleted successfully")
+                        .build();
+                return TransportProtocol.Response.newBuilder()
+                        .setPayload(deleteResponse.toByteString());
+            } else {
+                deleteResponse = ArtistMessages.DeleteArtistResponse.newBuilder()
+                        .setSuccess(false)
+                        .setMessage("Artist not found")
+                        .build();
+
+                return TransportProtocol.Response.newBuilder()
+                        .setStatusCode(404)
+                        .setPayload(deleteResponse.toByteString());
+            }
+        } catch (Exception e) {
+            logger.error("Error deleting artist", e);
+            ArtistMessages.DeleteArtistResponse deleteResponse =
+                    ArtistMessages.DeleteArtistResponse.newBuilder()
+                            .setSuccess(false)
+                            .setMessage("Error: " + e.getMessage())
+                            .build();
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(deleteResponse.toByteString());
+        }
+    }
+    }

src/main/java/com/mediamanager/service/delegate/handler/artist/GetArtistByIdHandler.java

@@ -0,0 +1,56 @@
+package com.mediamanager.service.delegate.handler.artist;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.ArtistMapper;
+import com.mediamanager.model.Artist;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.ArtistMessages;
+import com.mediamanager.service.artist.ArtistService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.Optional;
+
+@Action(value = "artist.getById")
+public class GetArtistByIdHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(GetArtistByIdHandler.class);
+    private final ArtistService artistService;
+
+    public GetArtistByIdHandler(ArtistService artistService) {
+        this.artistService = artistService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+        throws InvalidProtocolBufferException{
+
+        try{
+            ArtistMessages.GetArtistByIdRequest getByIdRequest =
+                    ArtistMessages.GetArtistByIdRequest.parseFrom(requestPayload);
+            int id = getByIdRequest.getId();
+
+            Optional<Artist> artistOpt = artistService.getArtistById(id);
+
+            if (artistOpt.isEmpty()){
+                logger.warn("Artist not found with ID: {}", id);
+                return TransportProtocol.Response.newBuilder()
+                        .setStatusCode(404)
+                        .setPayload(ByteString.copyFromUtf8("Artist not found"));
+            }
+            ArtistMessages.Artist artistProto = ArtistMapper.toProtobuf(artistOpt.get());
+            ArtistMessages.GetArtistByIdResponse getByIdResponse = ArtistMessages.GetArtistByIdResponse.newBuilder()
+                    .setArtist(artistProto)
+                    .build();
+            return TransportProtocol.Response.newBuilder()
+                    .setPayload(getByIdResponse.toByteString());
+        } catch (Exception e) {
+            logger.error("Error getting artist by ID", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: "+ e.getMessage()));
+        }
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/artist/GetArtistHandler.java

@@ -0,0 +1,48 @@
+package com.mediamanager.service.delegate.handler.artist;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.ArtistMapper;
+import com.mediamanager.model.Artist;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.ArtistMessages;
+import com.mediamanager.service.artist.ArtistService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+
+
+@Action("artist.getAll")
+public class GetArtistHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(GetArtistHandler.class);
+
+    private final ArtistService artistService;
+
+    public GetArtistHandler(ArtistService artistService){this.artistService = artistService;}
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload) throws InvalidProtocolBufferException {
+        try{
+            List<Artist> artists = artistService.getAllArtists();
+            ArtistMessages.GetArtistsResponse.Builder responseBuilder = ArtistMessages.GetArtistsResponse.newBuilder();
+
+            for (Artist artist : artists) {
+                ArtistMessages.Artist artistProto = ArtistMapper.toProtobuf(artist);
+                responseBuilder.addArtists(artistProto);
+            }
+            ArtistMessages.GetArtistsResponse getArtistsResponse = responseBuilder.build();
+
+            return TransportProtocol.Response.newBuilder()
+                    .setPayload(getArtistsResponse.toByteString());
+
+        }catch (Exception e){
+            logger.error("Error getting artists", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/artist/UpdateArtistHandler.java

@@ -0,0 +1,65 @@
+package com.mediamanager.service.delegate.handler.artist;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.ArtistMapper;
+import com.mediamanager.model.Artist;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.ArtistMessages;
+import com.mediamanager.service.artist.ArtistService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.Optional;
+
+@Action("artist.update")
+public class UpdateArtistHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(UpdateArtistHandler.class);
+    private final ArtistService artistService;
+
+    public UpdateArtistHandler(ArtistService artistService) {
+        this.artistService = artistService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload) throws InvalidProtocolBufferException {
+        try{
+            ArtistMessages.UpdateArtistRequest updateRequest =
+                    ArtistMessages.UpdateArtistRequest.parseFrom(requestPayload);
+
+            int id = updateRequest.getId();
+            String newName = updateRequest.getName();
+
+            Optional<Artist> artistOpt = artistService.updateArtist(id, newName);
+
+            if(artistOpt.isEmpty()){
+                logger.warn("Artist not found with ID: {}", id);
+                return TransportProtocol.Response.newBuilder()
+                        .setStatusCode(404)
+                        .setPayload(ByteString.copyFromUtf8("Artist not found"));
+            }
+
+            ArtistMessages.Artist artistProto = ArtistMapper.toProtobuf(artistOpt.get());
+
+            ArtistMessages.UpdateArtistResponse updateResponse = ArtistMessages.UpdateArtistResponse.newBuilder()
+                    .setArtist(artistProto)
+                    .build();
+
+            return TransportProtocol.Response.newBuilder()
+                    .setPayload(updateResponse.toByteString());
+
+        } catch (IllegalArgumentException e){
+            logger.error("Validation error", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(400)
+                    .setPayload(ByteString.copyFromUtf8("Validation error: " + e.getMessage()));
+        } catch (Exception e) {
+            logger.error("Error updating artist", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/bitdepth/CreateBitDepthHandler.java

@@ -0,0 +1,52 @@
+package com.mediamanager.service.delegate.handler.bitdepth;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.BitDepthMapper;
+import com.mediamanager.model.BitDepth;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.ArtistMessages;
+import com.mediamanager.protocol.messages.BitDepthMessages;
+import com.mediamanager.service.bitdepth.BitDepthService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+@Action("bitdepth.create")
+public class CreateBitDepthHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(CreateBitDepthHandler.class);
+    private final BitDepthService bitDepthService;
+
+    public CreateBitDepthHandler(BitDepthService bitDepthService) {
+        this.bitDepthService = bitDepthService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload) throws InvalidProtocolBufferException {
+        try{
+            BitDepthMessages.CreateBitDepthRequest createRequest =
+                    BitDepthMessages.CreateBitDepthRequest.parseFrom(requestPayload);
+            BitDepth bitDepth = bitDepthService.createBitDepth(createRequest.getValue());
+            BitDepthMessages.BitDepth BitDepthProto = BitDepthMapper.toProtobuf(bitDepth);
+            BitDepthMessages.CreateBitDepthResponse createBitDepthResponse = BitDepthMessages.CreateBitDepthResponse.newBuilder()
+                    .setBitdepth(BitDepthProto)
+                    .build();
+            return TransportProtocol.Response.newBuilder()
+                    .setPayload(createBitDepthResponse.toByteString());
+        } catch (IllegalArgumentException e) {
+            logger.error("Validation error", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(400)
+                    .setPayload(ByteString.copyFromUtf8("Validation error: " + e.getMessage()));
+
+        } catch (Exception e) {
+            logger.error("Error creating bit-depth", e);
+            return TransportProtocol.Response.newBuilder()
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+    }
+}
+

src/main/java/com/mediamanager/service/delegate/handler/bitdepth/DeleteBitDepthHandler.java

@@ -0,0 +1,62 @@
+package com.mediamanager.service.delegate.handler.bitdepth;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.BitDepthMessages;
+import com.mediamanager.service.bitdepth.BitDepthService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+@Action("bitdepth.delete")
+public class DeleteBitDepthHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(DeleteBitDepthHandler.class);
+
+    private final BitDepthService bitDepthService;
+
+    public DeleteBitDepthHandler(BitDepthService bitDepthService) {
+        this.bitDepthService = bitDepthService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+
+        try {
+            BitDepthMessages.DeleteBitDepthRequest deleteRequest =
+                    BitDepthMessages.DeleteBitDepthRequest.parseFrom(requestPayload);
+            int id = deleteRequest.getId();
+            boolean success = bitDepthService.deleteBitDepth(id);
+            BitDepthMessages.DeleteBitDepthResponse deleteResponse;
+            if (success) {
+                deleteResponse = BitDepthMessages.DeleteBitDepthResponse.newBuilder()
+                        .setSuccess(true)
+                        .setMessage("Bit-Depth deleted successfully")
+                        .build();
+                return TransportProtocol.Response.newBuilder()
+                        .setPayload(deleteResponse.toByteString());
+            } else {
+                deleteResponse = BitDepthMessages.DeleteBitDepthResponse.newBuilder()
+                        .setSuccess(false)
+                        .setMessage("Bit-Depth not found")
+                        .build();
+
+                return TransportProtocol.Response.newBuilder()
+                        .setStatusCode(404)
+                        .setPayload(deleteResponse.toByteString());
+            }
+        } catch (Exception e) {
+            logger.error("Error deleting bit-depth", e);
+            BitDepthMessages.DeleteBitDepthResponse deleteResponse =
+                    BitDepthMessages.DeleteBitDepthResponse.newBuilder()
+                            .setSuccess(false)
+                            .setMessage("Error: " + e.getMessage())
+                            .build();
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(deleteResponse.toByteString());
+        }
+    }
+    }

src/main/java/com/mediamanager/service/delegate/handler/bitdepth/GetBitDepthByIdHandler.java

@@ -0,0 +1,56 @@
+package com.mediamanager.service.delegate.handler.bitdepth;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.BitDepthMapper;
+import com.mediamanager.model.BitDepth;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.BitDepthMessages;
+import com.mediamanager.service.bitdepth.BitDepthService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.Optional;
+
+@Action(value = "bitdepth.getById")
+public class GetBitDepthByIdHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(GetBitDepthByIdHandler.class);
+    private final BitDepthService bitDepthServicee;
+
+    public GetBitDepthByIdHandler(BitDepthService bitDepthServicee) {
+        this.bitDepthServicee = bitDepthServicee;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+        throws InvalidProtocolBufferException{
+
+        try{
+            BitDepthMessages.GetBitDepthByIdRequest getByIdRequest =
+                    BitDepthMessages.GetBitDepthByIdRequest.parseFrom(requestPayload);
+            int id = getByIdRequest.getId();
+
+            Optional<BitDepth> bitDepthOpt = bitDepthServicee.getBitDepthById(id);
+
+            if (bitDepthOpt.isEmpty()){
+                logger.warn("BitDepth not found with ID: {}", id);
+                return TransportProtocol.Response.newBuilder()
+                        .setStatusCode(404)
+                        .setPayload(ByteString.copyFromUtf8("BitDepth not found"));
+            }
+            BitDepthMessages.BitDepth bitDepthProto = BitDepthMapper.toProtobuf(bitDepthOpt.get());
+            BitDepthMessages.GetBitDepthByIdResponse getByIdResponse = BitDepthMessages.GetBitDepthByIdResponse.newBuilder()
+                    .setBitdepth(bitDepthProto)
+                    .build();
+            return TransportProtocol.Response.newBuilder()
+                    .setPayload(getByIdResponse.toByteString());
+        } catch (Exception e) {
+            logger.error("Error getting bit-depth by ID", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: "+ e.getMessage()));
+        }
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/bitdepth/GetBitDepthHandler.java

@@ -0,0 +1,48 @@
+package com.mediamanager.service.delegate.handler.bitdepth;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.BitDepthMapper;
+import com.mediamanager.model.BitDepth;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.BitDepthMessages;
+import com.mediamanager.service.bitdepth.BitDepthService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+
+
+@Action("bitdepth.getAll")
+public class GetBitDepthHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(GetBitDepthHandler.class);
+
+    private final BitDepthService bitDepthService;
+
+    public GetBitDepthHandler(BitDepthService bitDepthService){this.bitDepthService = bitDepthService;}
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload) throws InvalidProtocolBufferException {
+        try{
+            List<BitDepth> bitDepths = bitDepthService.getAllBitDepths();
+            BitDepthMessages.GetBitDepthsResponse.Builder responseBuilder = BitDepthMessages.GetBitDepthsResponse.newBuilder();
+
+            for (BitDepth bitDepth : bitDepths) {
+                BitDepthMessages.BitDepth bitDepthProto = BitDepthMapper.toProtobuf(bitDepth);
+                responseBuilder.addBitdepths(bitDepthProto);
+            }
+            BitDepthMessages.GetBitDepthsResponse getBitDepthsResponse = responseBuilder.build();
+
+            return TransportProtocol.Response.newBuilder()
+                    .setPayload(getBitDepthsResponse.toByteString());
+
+        }catch (Exception e){
+            logger.error("Error getting bit-depths", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/bitdepth/UpdateBitDepthHandler.java

@@ -0,0 +1,65 @@
+package com.mediamanager.service.delegate.handler.bitdepth;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.BitDepthMapper;
+import com.mediamanager.model.BitDepth;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.BitDepthMessages;
+import com.mediamanager.service.bitdepth.BitDepthService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.Optional;
+
+@Action("bitdepth.update")
+public class UpdateBitDepthHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(UpdateBitDepthHandler.class);
+    private final BitDepthService bitDepthService;
+
+    public UpdateBitDepthHandler(BitDepthService bitDepthService) {
+        this.bitDepthService = bitDepthService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload) throws InvalidProtocolBufferException {
+        try{
+            BitDepthMessages.UpdateBitDepthRequest updateRequest =
+                    BitDepthMessages.UpdateBitDepthRequest.parseFrom(requestPayload);
+
+            int id = updateRequest.getId();
+            String newValue = updateRequest.getValue();
+
+            Optional<BitDepth> bitDepthOpt = bitDepthService.updateBitDepth(id, newValue);
+
+            if(bitDepthOpt.isEmpty()){
+                logger.warn("BitDepth not found with ID: {}", id);
+                return TransportProtocol.Response.newBuilder()
+                        .setStatusCode(404)
+                        .setPayload(ByteString.copyFromUtf8("BitDepth not found"));
+            }
+
+            BitDepthMessages.BitDepth bitDepthProto = BitDepthMapper.toProtobuf(bitDepthOpt.get());
+
+            BitDepthMessages.UpdateBitDepthResponse updateResponse = BitDepthMessages.UpdateBitDepthResponse.newBuilder()
+                    .setBitdepth(bitDepthProto)
+                    .build();
+
+            return TransportProtocol.Response.newBuilder()
+                    .setPayload(updateResponse.toByteString());
+
+        } catch (IllegalArgumentException e){
+            logger.error("Validation error", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(400)
+                    .setPayload(ByteString.copyFromUtf8("Validation error: " + e.getMessage()));
+        } catch (Exception e) {
+            logger.error("Error updating bit-depth", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/composer/CreateComposerHandler.java

@@ -0,0 +1,51 @@
+package com.mediamanager.service.delegate.handler.composer;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.ComposerMapper;
+import com.mediamanager.model.Composer;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.ComposerMessages;
+import com.mediamanager.service.composer.ComposerService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+@Action("composer.create")
+public class CreateComposerHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(CreateComposerHandler.class);
+    private final ComposerService composerService;
+
+    public CreateComposerHandler(ComposerService composerService) {
+        this.composerService = composerService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+        try{
+            ComposerMessages.CreateComposerRequest CreateRequest = ComposerMessages.CreateComposerRequest
+                    .parseFrom(requestPayload);
+            Composer composer = composerService.createComposer(CreateRequest.getName());
+            ComposerMessages.Composer composerProto = ComposerMapper.toProtobuf(composer);
+            ComposerMessages.CreateComposerResponse createResponse = ComposerMessages.CreateComposerResponse
+                    .newBuilder().setComposer(composerProto).build();
+            return TransportProtocol.Response.newBuilder().setPayload(createResponse.toByteString());
+
+        } catch (IllegalArgumentException e){
+            logger.error("Validation error", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(400)
+                    .setPayload(ByteString.copyFromUtf8("Validation error: " + e.getMessage()));
+
+        } catch (Exception e){
+            logger.error("Error creating composer", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/composer/DeleteComposerHandler.java

@@ -0,0 +1,53 @@
+package com.mediamanager.service.delegate.handler.composer;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.ComposerMessages;
+import com.mediamanager.service.composer.ComposerService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+@Action( "composer.delete")
+public class DeleteComposerHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(DeleteComposerHandler.class);
+    private final ComposerService composerService;
+
+
+    public DeleteComposerHandler(ComposerService composerService){
+        this.composerService = composerService;
+    }
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+        try {
+            ComposerMessages.DeleteComposerRequest deleteRequest =
+                    ComposerMessages.DeleteComposerRequest.parseFrom(requestPayload);
+            int id = deleteRequest.getId();
+            boolean success = composerService.deleteComposer(id);
+            ComposerMessages.DeleteComposerResponse deleteResponse;
+            if(success){
+                deleteResponse = ComposerMessages.DeleteComposerResponse.newBuilder().setSuccess(true)
+                        .setMessage("Composer deleted successfully").build();
+
+
+                return TransportProtocol.Response.newBuilder()
+                        .setPayload(deleteResponse.toByteString());
+            }else {
+                deleteResponse = ComposerMessages.DeleteComposerResponse.newBuilder().setSuccess(false)
+                        .setMessage("Composer not found").build();
+                return TransportProtocol.Response.newBuilder().setStatusCode(404)
+                        .setPayload(deleteResponse.toByteString());
+            }
+
+        } catch (Exception e) {
+            logger.error("Error deleting composer", e);
+            ComposerMessages.DeleteComposerResponse deleteResponse = ComposerMessages.DeleteComposerResponse
+                    .newBuilder().setSuccess(false).setMessage("Error: " + e.getMessage()).build();
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500).setPayload(deleteResponse.toByteString());
+        }
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/composer/GetComposerByIdHandler.java

@@ -0,0 +1,57 @@
+package com.mediamanager.service.delegate.handler.composer;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.ComposerMapper;
+import com.mediamanager.model.Composer;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.ComposerMessages;
+import com.mediamanager.service.composer.ComposerService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.Optional;
+
+@Action( "composer.getById")
+public class GetComposerByIdHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(GetComposerByIdHandler.class);
+    private final ComposerService composerService;
+
+    public GetComposerByIdHandler(ComposerService composerService){
+        this.composerService = composerService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+        try{
+
+            ComposerMessages.GetComposerByIdRequest getByIdRequest = ComposerMessages.GetComposerByIdRequest
+                    .parseFrom(requestPayload);
+            int id = getByIdRequest.getId();
+
+            Optional<Composer> composerOpt = composerService.getComposerById(id);
+
+            if (composerOpt.isEmpty()) {
+              logger.warn("Composer not found with ID: {}", id);
+              return TransportProtocol.Response.newBuilder()
+                      .setStatusCode(404)
+                      .setPayload(ByteString.copyFromUtf8("Composer not found"));
+            }
+
+            ComposerMessages.Composer composerProto = ComposerMapper.toProtobuf(composerOpt.get());
+
+            ComposerMessages.GetComposerByIdResponse getByIdResponse = ComposerMessages.GetComposerByIdResponse
+                    .newBuilder().setComposer(composerProto).build();
+
+            return TransportProtocol.Response.newBuilder().setPayload(getByIdResponse.toByteString());
+        } catch (Exception e) {
+            logger.error("Error getting composer by ID", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/composer/GetComposerHandler.java

@@ -0,0 +1,50 @@
+package com.mediamanager.service.delegate.handler.composer;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.ComposerMapper;
+import com.mediamanager.model.Composer;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.ComposerMessages;
+import com.mediamanager.protocol.messages.GenreMessages;
+import com.mediamanager.service.composer.ComposerService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+
+@Action( "composer.getAll")
+public class GetComposerHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(GetComposerHandler.class);
+    private final ComposerService composerService;
+
+    public GetComposerHandler(ComposerService composerService){
+        this.composerService = composerService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+
+        try{
+            List<Composer> composers = composerService.getAllComposers();
+
+            ComposerMessages.GetComposersResponse.Builder responseBuilder = ComposerMessages.GetComposersResponse.newBuilder();
+            for(Composer composer : composers){
+                ComposerMessages.Composer composerProto = ComposerMapper.toProtobuf(composer);
+                responseBuilder.addComposers(composerProto);
+            }
+            ComposerMessages.GetComposersResponse getGenresResponse = responseBuilder.build();
+            return TransportProtocol.Response.newBuilder().setPayload(getGenresResponse.toByteString());
+        } catch (Exception e) {
+            logger.error("Error getting composers", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+
+    }
+
+}

src/main/java/com/mediamanager/service/delegate/handler/composer/UpdateComposerHandler.java

@@ -0,0 +1,56 @@
+package com.mediamanager.service.delegate.handler.composer;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.ComposerMapper;
+import com.mediamanager.model.Composer;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.ComposerMessages;
+import com.mediamanager.service.composer.ComposerService;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.Optional;
+
+@Action("composer.update")
+public class UpdateComposerHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(UpdateComposerHandler.class);
+    private final ComposerService composerService;
+    public UpdateComposerHandler(ComposerService composerService){
+        this.composerService = composerService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+        try{
+            ComposerMessages.UpdateComposerRequest updateRequest = ComposerMessages.UpdateComposerRequest
+                    .parseFrom(requestPayload);
+            int id = updateRequest.getId();
+            String newName = updateRequest.getName();
+            Optional<Composer> composerOpt = composerService.updateComposer(id, newName);
+            if (composerOpt.isEmpty()) {
+                logger.warn("Composer not found with ID: {}", id);
+                return TransportProtocol.Response.newBuilder()
+                        .setStatusCode(404)
+                        .setPayload(ByteString.copyFromUtf8("Composer not found"));
+            }
+            ComposerMessages.Composer composerProto = ComposerMapper.toProtobuf(composerOpt.get());
+            ComposerMessages.UpdateComposerResponse updateResponse = ComposerMessages.UpdateComposerResponse
+                    .newBuilder().setComposer(composerProto).build();
+            return TransportProtocol.Response.newBuilder().setPayload(updateResponse.toByteString());
+        }catch (IllegalArgumentException e){
+            logger.error("Validation error", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(400)
+                    .setPayload(ByteString.copyFromUtf8("Validation error: " + e.getMessage()));
+        } catch (Exception e) {
+            logger.error("Error updating composer", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/genre/CreateGenreHandler.java

@@ -0,0 +1,62 @@
+package com.mediamanager.service.delegate.handler.genre;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.GenreMapper;
+import com.mediamanager.model.Genre;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.GenreMessages;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import com.mediamanager.service.genre.GenreService;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+@Action("genre.create")
+public class CreateGenreHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(CreateGenreHandler.class);
+
+    private final GenreService genreService;
+
+    public CreateGenreHandler(GenreService genreService) {
+        this.genreService = genreService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+        try {
+            // 1. Parse protobuf request
+            GenreMessages.CreateGenreRequest createRequest =
+                    GenreMessages.CreateGenreRequest.parseFrom(requestPayload);
+
+            // 2. Chama service (lógica de negócio)
+            Genre genre = genreService.createGenre(createRequest.getName());
+
+            // 3. Converte entity para protobuf
+            GenreMessages.Genre genreProto = GenreMapper.toProtobuf(genre);
+
+            // 4. Cria response protobuf
+            GenreMessages.CreateGenreResponse createResponse =
+                    GenreMessages.CreateGenreResponse.newBuilder()
+                            .setGenre(genreProto)
+                            .build();
+
+            // 5. Retorna
+            return TransportProtocol.Response.newBuilder()
+                    .setPayload(createResponse.toByteString());
+
+        } catch (IllegalArgumentException e) {
+            logger.error("Validation error", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(400)
+                    .setPayload(ByteString.copyFromUtf8("Validation error: " + e.getMessage()));
+
+        } catch (Exception e) {
+            logger.error("Error creating genre", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/genre/DeleteGenreHandler.java

@@ -0,0 +1,72 @@
+package com.mediamanager.service.delegate.handler.genre;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.GenreMessages;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import com.mediamanager.service.genre.GenreService;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+@Action("genre.delete")
+public class DeleteGenreHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(DeleteGenreHandler.class);
+
+    private final GenreService genreService;
+
+    public DeleteGenreHandler(GenreService genreService) {
+        this.genreService = genreService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+        try {
+            // 1. Parse protobuf request
+            GenreMessages.DeleteGenreRequest deleteRequest =
+                    GenreMessages.DeleteGenreRequest.parseFrom(requestPayload);
+
+            int id = deleteRequest.getId();
+
+            // 2. Deleta via service
+            boolean success = genreService.deleteGenre(id);
+
+            // 3. Cria response
+            GenreMessages.DeleteGenreResponse deleteResponse;
+
+            if (success) {
+                deleteResponse = GenreMessages.DeleteGenreResponse.newBuilder()
+                        .setSuccess(true)
+                        .setMessage("Genre deleted successfully")
+                        .build();
+
+                return TransportProtocol.Response.newBuilder()
+                        .setPayload(deleteResponse.toByteString());
+            } else {
+                deleteResponse = GenreMessages.DeleteGenreResponse.newBuilder()
+                        .setSuccess(false)
+                        .setMessage("Genre not found")
+                        .build();
+
+                return TransportProtocol.Response.newBuilder()
+                        .setStatusCode(404)
+                        .setPayload(deleteResponse.toByteString());
+            }
+
+        } catch (Exception e) {
+            logger.error("Error deleting genre", e);
+
+            GenreMessages.DeleteGenreResponse deleteResponse =
+                    GenreMessages.DeleteGenreResponse.newBuilder()
+                            .setSuccess(false)
+                            .setMessage("Error: " + e.getMessage())
+                            .build();
+
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(deleteResponse.toByteString());
+        }
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/genre/GetGenreByIdHandler.java

@@ -0,0 +1,66 @@
+package com.mediamanager.service.delegate.handler.genre;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.GenreMapper;
+import com.mediamanager.model.Genre;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.GenreMessages;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import com.mediamanager.service.genre.GenreService;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.Optional;
+
+@Action("genre.getById")
+public class GetGenreByIdHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(GetGenreByIdHandler.class);
+
+    private final GenreService genreService;
+
+    public GetGenreByIdHandler(GenreService genreService) {
+        this.genreService = genreService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+        try {
+            // 1. Parse protobuf request
+            GenreMessages.GetGenreByIdRequest getByIdRequest =
+                    GenreMessages.GetGenreByIdRequest.parseFrom(requestPayload);
+
+            int id = getByIdRequest.getId();
+
+            // 2. Busca via service
+            Optional<Genre> genreOpt = genreService.getGenreById(id);
+
+            if (genreOpt.isEmpty()) {
+                logger.warn("Genre not found with ID: {}", id);
+                return TransportProtocol.Response.newBuilder()
+                        .setStatusCode(404)
+                        .setPayload(ByteString.copyFromUtf8("Genre not found"));
+            }
+
+            // 3. Converte para protobuf
+            GenreMessages.Genre genreProto = GenreMapper.toProtobuf(genreOpt.get());
+
+            GenreMessages.GetGenreByIdResponse getByIdResponse =
+                    GenreMessages.GetGenreByIdResponse.newBuilder()
+                            .setGenre(genreProto)
+                            .build();
+
+            // 4. Retorna
+            return TransportProtocol.Response.newBuilder()
+                    .setPayload(getByIdResponse.toByteString());
+
+        } catch (Exception e) {
+            logger.error("Error getting genre by ID", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/genre/GetGenreHandler.java

@@ -0,0 +1,56 @@
+package com.mediamanager.service.delegate.handler.genre;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.GenreMapper;
+import com.mediamanager.model.Genre;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.GenreMessages;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import com.mediamanager.service.genre.GenreService;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+
+@Action("genre.getAll")
+public class GetGenreHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(GetGenreHandler.class);
+
+    private final GenreService genreService;
+
+    public GetGenreHandler(GenreService genreService) {
+        this.genreService = genreService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+        try {
+            // 1. Busca todos os genres via service
+            List<Genre> genres = genreService.getAllGenres();
+
+            // 2. Converte cada Genre para protobuf
+            GenreMessages.GetGenresResponse.Builder responseBuilder =
+                    GenreMessages.GetGenresResponse.newBuilder();
+
+            for (Genre genre : genres) {
+                GenreMessages.Genre genreProto = GenreMapper.toProtobuf(genre);
+                responseBuilder.addGenres(genreProto);
+            }
+
+            GenreMessages.GetGenresResponse getGenresResponse = responseBuilder.build();
+
+            // 3. Retorna
+            return TransportProtocol.Response.newBuilder()
+                    .setPayload(getGenresResponse.toByteString());
+
+        } catch (Exception e) {
+            logger.error("Error getting genres", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+    }
+}

src/main/java/com/mediamanager/service/delegate/handler/genre/UpdateGenreHandler.java

@@ -0,0 +1,73 @@
+package com.mediamanager.service.delegate.handler.genre;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.mediamanager.mapper.GenreMapper;
+import com.mediamanager.model.Genre;
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.protocol.messages.GenreMessages;
+import com.mediamanager.service.delegate.ActionHandler;
+import com.mediamanager.service.delegate.annotation.Action;
+import com.mediamanager.service.genre.GenreService;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.Optional;
+
+@Action("genre.update")
+public class UpdateGenreHandler implements ActionHandler {
+    private static final Logger logger = LogManager.getLogger(UpdateGenreHandler.class);
+
+    private final GenreService genreService;
+
+    public UpdateGenreHandler(GenreService genreService) {
+        this.genreService = genreService;
+    }
+
+    @Override
+    public TransportProtocol.Response.Builder handle(ByteString requestPayload)
+            throws InvalidProtocolBufferException {
+        try {
+            // 1. Parse protobuf request
+            GenreMessages.UpdateGenreRequest updateRequest =
+                    GenreMessages.UpdateGenreRequest.parseFrom(requestPayload);
+
+            int id = updateRequest.getId();
+            String newName = updateRequest.getName();
+
+            // 2. Atualiza via service
+            Optional<Genre> genreOpt = genreService.updateGenre(id, newName);
+
+            if (genreOpt.isEmpty()) {
+                logger.warn("Genre not found with ID: {}", id);
+                return TransportProtocol.Response.newBuilder()
+                        .setStatusCode(404)
+                        .setPayload(ByteString.copyFromUtf8("Genre not found"));
+            }
+
+            // 3. Converte para protobuf
+            GenreMessages.Genre genreProto = GenreMapper.toProtobuf(genreOpt.get());
+
+            GenreMessages.UpdateGenreResponse updateResponse =
+                    GenreMessages.UpdateGenreResponse.newBuilder()
+                            .setGenre(genreProto)
+                            .build();
+
+            // 4. Retorna
+            return TransportProtocol.Response.newBuilder()
+                    .setPayload(updateResponse.toByteString());
+
+        } catch (IllegalArgumentException e) {
+            logger.error("Validation error", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(400)
+                    .setPayload(ByteString.copyFromUtf8("Validation error: " + e.getMessage()));
+
+        } catch (Exception e) {
+            logger.error("Error updating genre", e);
+            return TransportProtocol.Response.newBuilder()
+                    .setStatusCode(500)
+                    .setPayload(ByteString.copyFromUtf8("Error: " + e.getMessage()));
+        }
+    }
+}

src/main/java/com/mediamanager/service/genre/GenreService.java

@@ -0,0 +1,88 @@
+package com.mediamanager.service.genre;
+
+import com.mediamanager.model.Genre;
+import com.mediamanager.repository.GenreRepository;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+import java.util.Optional;
+
+/**
+ * Service para lógica de negócio relacionada a Genre
+ */
+public class GenreService {
+    private static final Logger logger = LogManager.getLogger(GenreService.class);
+
+    private final GenreRepository genreRepository;
+
+    public GenreService(GenreRepository genreRepository) {
+        this.genreRepository = genreRepository;
+    }
+
+    /**
+     * Cria um novo genre
+     */
+    public Genre createGenre(String name) {
+        logger.info("Creating genre: {}", name);
+
+        // Aqui poderia ter validações de negócio
+        if (name == null || name.trim().isEmpty()) {
+            throw new IllegalArgumentException("Genre name cannot be empty");
+        }
+
+        Genre genre = new Genre();
+        genre.setName(name.trim());
+
+        return genreRepository.save(genre);
+    }
+
+    /**
+     * Busca todos os genres
+     */
+    public List<Genre> getAllGenres() {
+        logger.info("Getting all genres");
+        return genreRepository.findAll();
+    }
+
+    /**
+     * Busca genre por ID
+     */
+    public Optional<Genre> getGenreById(Integer id) {
+        logger.info("Getting genre by ID: {}", id);
+        return genreRepository.findById(id);
+    }
+
+    /**
+     * Atualiza um genre existente
+     */
+    public Optional<Genre> updateGenre(Integer id, String name) {
+        logger.info("Updating genre ID {}: {}", id, name);
+
+        // Validação
+        if (name == null || name.trim().isEmpty()) {
+            throw new IllegalArgumentException("Genre name cannot be empty");
+        }
+
+        Optional<Genre> existingGenre = genreRepository.findById(id);
+
+        if (existingGenre.isEmpty()) {
+            logger.warn("Genre not found with ID: {}", id);
+            return Optional.empty();
+        }
+
+        Genre genre = existingGenre.get();
+        genre.setName(name.trim());
+
+        Genre updated = genreRepository.update(genre);
+        return Optional.of(updated);
+    }
+
+    /**
+     * Deleta um genre por ID
+     */
+    public boolean deleteGenre(Integer id) {
+        logger.info("Deleting genre ID: {}", id);
+        return genreRepository.deleteById(id);
+    }
+}

src/main/java/com/mediamanager/service/ipc/IPCManager.java

@@ -0,0 +1,337 @@
+package com.mediamanager.service.ipc;
+
+import com.mediamanager.protocol.TransportProtocol;
+import com.mediamanager.service.delegate.DelegateActionManager;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+
+import java.io.IOException;
+import java.net.StandardProtocolFamily;
+import java.net.UnixDomainSocketAddress;
+import java.nio.channels.ServerSocketChannel;
+import java.nio.channels.SocketChannel;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.attribute.PosixFilePermission;
+import java.nio.file.attribute.PosixFilePermissions;
+import java.util.Properties;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class IPCManager {
+    private final Properties configuration;
+    private static final Logger logger = LogManager.getLogger(IPCManager.class);
+    private final DelegateActionManager actionManager;
+
+    private Path socketPath;
+    private UnixDomainSocketAddress socketAddress;
+    private ServerSocketChannel serverChannel;
+    private ExecutorService clientThreadPool;
+    private final AtomicBoolean running = new AtomicBoolean(false);
+    private final ConcurrentHashMap<Integer, ClientHandler> activeClients = new ConcurrentHashMap<>();
+    private final AtomicInteger clientIdCounter = new AtomicInteger(0);
+
+
+    public IPCManager(Properties config, DelegateActionManager actionManager){
+        configuration = config;
+        this.actionManager = actionManager;
+        logger.debug("IPCManager created with configuration:");
+
+
+    }
+    public void init() throws Exception {
+        logger.info("Initializing IPC connection...");
+        validateConfiguration();
+        socketPath = Path.of(configuration.getProperty("ipc.socket.path")).resolve("mediamanager.sock");
+
+        if (Files.exists(socketPath)) {
+            logger.warn("Socket file already exists at: {}", socketPath);
+            logger.info("Deleting existing socket...");
+            Files.deleteIfExists(socketPath);
+        }
+
+        Path parentDir = socketPath.getParent();
+        if (parentDir != null && !Files.exists(parentDir)) {
+            logger.info("Creating parent directory for socket: {}", parentDir);
+            Files.createDirectories(parentDir);
+        }
+
+        try {
+            socketAddress = UnixDomainSocketAddress.of(socketPath);
+            logger.debug("Socket address created");
+
+            serverChannel = ServerSocketChannel.open(StandardProtocolFamily.UNIX);
+            serverChannel.bind(socketAddress);
+            logger.info("Server bound to socket - file created at: {}", socketPath);
+
+            // ESTA É A MUDANÇA CRÍTICA
+            // Configura o canal para modo não-bloqueante
+            // Isso faz accept() retornar null imediatamente se não houver cliente
+            // ao invés de bloquear esperando indefinidamente
+            serverChannel.configureBlocking(false);
+            logger.debug("Server channel configured for non-blocking mode");
+
+            Set<PosixFilePermission> perms = PosixFilePermissions.fromString("rw-------");
+            Files.setPosixFilePermissions(socketPath, perms);
+            logger.debug("Socket permissions set to: rw-------");
+
+            clientThreadPool = Executors.newCachedThreadPool(runnable -> {
+                Thread thread = new Thread(runnable);
+                thread.setName("IPC-Client-Handler-" + thread.getId());
+                thread.setDaemon(true);
+                return thread;
+            });
+            logger.debug("Client thread pool created");
+
+            running.set(true);
+
+            Thread serverThread = new Thread(this::acceptConnectionsLoop, "IPC-Server-Accept-Thread");
+            serverThread.setDaemon(true);
+            serverThread.start();
+            logger.info("Server thread started - accepting connections");
+
+            logger.info("IPC server initialized successfully on {}", socketPath.toAbsolutePath());
+
+        } catch (IOException e) {
+            logger.error("Failed to initialize IPC server: {}", e.getMessage());
+            throw new Exception("Failed to initialize IPC server: " + e.getMessage(), e);
+        }
+    }
+    private void validateConfiguration() throws Exception {
+        String[] requiredProperties = {
+                "ipc.socket.path"
+        };
+        for (String property : requiredProperties) {
+            if (configuration.getProperty(property) == null) {
+                throw new Exception("Missing required configuration property: " + property);
+            }
+        }
+        logger.debug("IPC configuration validated successfully");
+    }
+
+    public Path getSocketPath(){
+        return socketPath;
+    }
+
+    public void close() throws Exception {
+        if(!running.get()){
+            logger.warn("IPC connection is already closed");
+        }
+
+
+          logger.info("Closing IPC connection...");
+
+        running.set(false);
+        if (serverChannel != null && serverChannel.isOpen()) {
+            serverChannel.close();
+            logger.debug("Server channel closed");
+        }
+
+        if (clientThreadPool != null) {
+            clientThreadPool.shutdown();
+            try {
+                if (!clientThreadPool.awaitTermination(30, TimeUnit.SECONDS)) {
+                    logger.warn("Some client handlers did not finish in time, forcing shutdown");
+                    clientThreadPool.shutdownNow();
+                }
+            } catch (InterruptedException e) {
+                logger.error("Interrupted while waiting for client handlers", e);
+                clientThreadPool.shutdownNow();
+                Thread.currentThread().interrupt();
+            }
+        }
+
+        if (socketPath != null && Files.exists(socketPath)) {
+            Files.deleteIfExists(socketPath);
+            logger.info("Socket file deleted successfully");
+        }
+
+        logger.info("IPC server closed successfully");
+    }
+
+    private void acceptConnectionsLoop() {
+        logger.info("Preparing to accept connections...");
+
+        while (running.get()) {
+            try {
+                // Em modo não-bloqueante, accept() retorna imediatamente
+                // Se há um cliente esperando, retorna o SocketChannel
+                // Se não há cliente, retorna null
+                SocketChannel clientChannel = serverChannel.accept();
+
+                if (clientChannel != null) {
+                    // Um cliente realmente se conectou!
+                    int clientId = clientIdCounter.incrementAndGet();
+                    logger.info("Client {} connected", clientId);
+
+                    ClientHandler handler = new ClientHandler(clientId, clientChannel);
+                    activeClients.put(clientId, handler);
+
+                    clientThreadPool.submit(() -> {
+                        try {
+                            handler.handle();
+                        } finally {
+                            activeClients.remove(clientId);
+                            logger.info("Client {} disconnected", clientId);
+                        }
+                    });
+                } else {
+                    // Nenhum cliente conectado no momento
+                    // Dorme por um curto período antes de verificar novamente
+                    // Isso evita consumir CPU desnecessariamente em um loop vazio
+                    Thread.sleep(1); // 1 milissegundos
+                }
+
+            } catch (InterruptedException e) {
+                // Thread foi interrompida, provavelmente durante shutdown
+                logger.debug("Accept loop interrupted");
+                break;
+
+            } catch (IOException e) {
+                // Erros de I/O reais devem ser logados
+                if (running.get()) {
+                    logger.error("Error accepting client connection", e);
+                }
+                break;
+            }
+        }
+
+        logger.info("Connection loop stopped gracefully");
+    }
+
+
+    private class ClientHandler {
+        private final int clientId;
+        private final SocketChannel channel;
+
+        public ClientHandler(int clientId, SocketChannel channel) {
+            this.clientId = clientId;
+            this.channel = channel;
+        }
+
+        /**
+         * Método principal que processa a comunicação com o cliente.
+         * Aqui é onde vamos ler mensagens JSON, processá-las, e enviar respostas.
+         */
+        public void handle() {
+            logger.debug("Client {} handler thread started", clientId);
+
+            try {
+                // LOOP: processa múltiplas requests na mesma conexão
+                while (channel.isOpen()) {
+                    TransportProtocol.Request request = readRequest(channel);
+
+                    if (request == null) {
+                        // Cliente desconectou gracefully
+                        logger.info("Client {} disconnected (end of stream)", clientId);
+                        break;
+                    }
+
+                    logger.info("Client {} sent request {}", clientId, request.getRequestId());
+
+                    // Processa usando o DelegateActionManager
+                    TransportProtocol.Response response = actionManager.ProcessedRequest(request);
+
+                    // Envia resposta de volta
+                    writeResponse(channel, response);
+                    logger.info("Client {} response sent", clientId);
+
+                    // Verifica se é comando CLOSE
+                    String connectionHeader = response.getHeadersOrDefault("Connection", "");
+                    if ("close".equals(connectionHeader)) {
+                        logger.info("Client {} requested connection close", clientId);
+                        break; // Sai do loop e fecha
+                    }
+                }
+
+            } catch (IOException e) {
+                if (channel.isOpen()) {
+                    logger.error("IO error handling client {}", clientId, e);
+                } else {
+                    logger.debug("Client {} connection closed by peer", clientId);
+                }
+            } catch (Exception e) {
+                logger.error("Unexpected error handling client {}", clientId, e);
+            } finally {
+                try {
+                    if (channel.isOpen()) {
+                        channel.close();
+                    }
+                    logger.debug("Client {} channel closed", clientId);
+                } catch (IOException e) {
+                    logger.error("Error closing client {} channel", clientId, e);
+                }
+            }
+        }
+        private TransportProtocol.Request readRequest(SocketChannel channel) throws IOException {
+            // Primeiro, lê o tamanho da mensagem (4 bytes = int32)
+            java.nio.ByteBuffer sizeBuffer = java.nio.ByteBuffer.allocate(4);
+            int bytesRead = 0;
+
+            while (bytesRead < 4) {
+                int read = channel.read(sizeBuffer);
+                if (read == -1) {
+                    logger.debug("Client disconnected before sending size");
+                    return null;
+                }
+                bytesRead += read;
+            }
+
+            sizeBuffer.flip();
+            int messageSize = sizeBuffer.getInt();
+            logger.debug("Expecting message of {} bytes", messageSize);
+
+            // Validação básica de segurança
+            if (messageSize <= 0 || messageSize > 1024 * 1024) { // Max 1MB
+                throw new IOException("Invalid message size: " + messageSize);
+            }
+
+            // Agora lê a mensagem completa
+            java.nio.ByteBuffer messageBuffer = java.nio.ByteBuffer.allocate(messageSize);
+            bytesRead = 0;
+
+            while (bytesRead < messageSize) {
+                int read = channel.read(messageBuffer);
+                if (read == -1) {
+                    throw new IOException("Client disconnected while reading message");
+                }
+                bytesRead += read;
+            }
+
+            messageBuffer.flip();
+
+            // Deserializa o Protocol Buffers
+            byte[] messageBytes = new byte[messageSize];
+            messageBuffer.get(messageBytes);
+
+            return TransportProtocol.Request.parseFrom(messageBytes);
+        }
+
+        private void writeResponse(SocketChannel channel, TransportProtocol.Response response) throws IOException {
+            byte[] messageBytes = response.toByteArray();
+            int messageSize = messageBytes.length;
+
+            logger.debug("Writing response of {} bytes", messageSize);
+
+            java.nio.ByteBuffer buffer = java.nio.ByteBuffer.allocate(4 + messageSize);
+            buffer.putInt(messageSize);
+            buffer.put(messageBytes);
+            buffer.flip();
+
+            while (buffer.hasRemaining()) {
+                channel.write(buffer);
+            }
+
+            logger.debug("Response written successfully");
+        }
+    }
+}
+
+
+

src/main/proto/artist.proto

@@ -0,0 +1,53 @@
+syntax = "proto3";
+
+option java_package = "com.mediamanager.protocol.messages";
+option java_outer_classname = "ArtistMessages";
+
+package mediamanager.messages;
+
+message Artist {
+  int32 id = 1;
+  string name = 2;
+}
+
+message CreateArtistRequest {
+  string name = 1;
+}
+
+message CreateArtistResponse {
+  Artist artist = 1;
+}
+
+message GetArtistsRequest {
+
+}
+
+message GetArtistsResponse {
+  repeated Artist artists = 1;
+}
+
+message GetArtistByIdRequest {
+  int32 id = 1;
+}
+
+message GetArtistByIdResponse {
+  Artist artist = 1;
+}
+
+message UpdateArtistRequest {
+  int32 id = 1;
+  string name = 2;  // Novo nome
+}
+
+message UpdateArtistResponse {
+  Artist Artist = 1;
+}
+
+message DeleteArtistRequest {
+  int32 id = 1;
+}
+
+message DeleteArtistResponse {
+  bool success = 1;
+  string message = 2;
+}

src/main/proto/bitdepth.proto

@@ -0,0 +1,53 @@
+syntax = "proto3";
+
+option java_package = "com.mediamanager.protocol.messages";
+option java_outer_classname = "BitDepthMessages";
+
+package mediamanager.messages;
+
+message BitDepth {
+  int32 id = 1;
+  string value = 2;
+}
+
+message CreateBitDepthRequest {
+  string value = 1;
+}
+
+message CreateBitDepthResponse {
+  BitDepth bitdepth = 1;
+}
+
+message GetBitDepthsRequest {
+
+}
+
+message GetBitDepthsResponse {
+  repeated BitDepth bitdepths = 1;
+}
+
+message GetBitDepthByIdRequest {
+  int32 id = 1;
+}
+
+message GetBitDepthByIdResponse {
+  BitDepth bitdepth = 1;
+}
+
+message UpdateBitDepthRequest {
+  int32 id = 1;
+  string value = 2;  // Novo nome
+}
+
+message UpdateBitDepthResponse {
+  BitDepth bitdepth = 1;
+}
+
+message DeleteBitDepthRequest {
+  int32 id = 1;
+}
+
+message DeleteBitDepthResponse {
+  bool success = 1;
+  string message = 2;
+}

src/main/proto/composer.proto

@@ -0,0 +1,51 @@
+syntax = "proto3";
+
+option java_package = "com.mediamanager.protocol.messages";
+option java_outer_classname = "ComposerMessages";
+
+package mediamanager.messages;
+
+message Composer {
+  int32 id =1;
+  string name =2;
+}
+
+message CreateComposerRequest{
+  string name =1;
+}
+
+message CreateComposerResponse{
+  Composer composer = 1;
+}
+
+message GetComposersRequest{}
+
+message GetComposersResponse{
+  repeated Composer composers = 1;
+}
+
+message GetComposerByIdRequest{
+  int32 id =1;
+}
+
+message GetComposerByIdResponse{
+  Composer composer =1;
+}
+
+message UpdateComposerRequest{
+  int32 id = 1;
+  string name=2;
+}
+
+message UpdateComposerResponse{
+  Composer composer = 1;
+}
+
+message DeleteComposerRequest{
+  int32 id = 1;
+}
+
+message DeleteComposerResponse{
+  bool success = 1;
+  string message = 2;
+}

src/main/proto/genre.proto

@@ -0,0 +1,53 @@
+syntax = "proto3";
+
+option java_package = "com.mediamanager.protocol.messages";
+option java_outer_classname = "GenreMessages";
+
+package mediamanager.messages;
+
+message Genre {
+  int32 id = 1;
+  string name = 2;
+}
+
+message CreateGenreRequest {
+  string name = 1;
+}
+
+message CreateGenreResponse {
+  Genre genre = 1;
+}
+
+message GetGenresRequest {
+
+}
+
+message GetGenresResponse {
+  repeated Genre genres = 1;
+}
+
+message GetGenreByIdRequest {
+  int32 id = 1;
+}
+
+message GetGenreByIdResponse {
+  Genre genre = 1;
+}
+
+message UpdateGenreRequest {
+  int32 id = 1;
+  string name = 2;  // Novo nome
+}
+
+message UpdateGenreResponse {
+  Genre genre = 1;  // Genre atualizado
+}
+
+message DeleteGenreRequest {
+  int32 id = 1;
+}
+
+message DeleteGenreResponse {
+  bool success = 1;
+  string message = 2;
+}

src/main/proto/messages.proto

@@ -0,0 +1,19 @@
+syntax = "proto3";
+
+option java_package = "com.mediamanager.protocol";
+option java_outer_classname = "TransportProtocol";
+
+package mediamanager;
+
+message Request {
+  string request_id = 1;
+  bytes payload = 2;
+  map<string, string> headers = 3;
+}
+
+message Response {
+  string request_id = 1;
+  int32 status_code = 2;
+  bytes payload = 3;
+  map<string, string> headers = 4;
+}

src/main/proto/test.proto

@@ -0,0 +1,30 @@
+syntax = "proto3";
+
+option java_package = "com.mediamanager.protocol";
+option java_outer_classname = "TestProtocol";
+
+package mediamanager.test;
+
+message EchoCommand {
+  string message = 1;
+}
+
+message EchoResponse {
+  string message = 1;
+  int64 server_timestamp = 2;
+}
+
+message HeartbeatCommand {
+  int64 client_timestamp = 1;
+}
+
+message HeartbeatResponse {
+  int64 client_timestamp = 1;
+  int64 server_timestamp = 2;
+}
+message CloseCommand {
+  // Vazio - apenas sinaliza fechamento
+}
+message CloseResponse {
+  string message = 1;
+}

src/main/resources/config.properties.example

@@ -21,3 +21,8 @@ hibernate.format_sql=true
 ipc.pipe.name=mediamanager-pipe
 ipc.pipe.path=/tmp/mediamanager
 ipc.buffer.size=8192
+runtype=local
+ipc.socket.path=/tmp/mediamanager
+
+
+

src/main/resources/log4j2.xml

@@ -1,12 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<Configuration status="WARN">
+<Configuration status="WARN" shutdownHook="disable">
     <Appenders>
-        <Console name="Console" target="SYSTEM_OUT">
+        <Console name="Console" target="SYSTEM_OUT" immediateFlush="true">
             <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} [%t] %-5level %logger{36} - %msg%n"/>
         </Console>
         
         <RollingFile name="FileAppender" fileName="logs/mediamanager.log"
-                     filePattern="logs/mediamanager-%d{yyyy-MM-dd}-%i.log">
+                     filePattern="logs/mediamanager-%d{yyyy-MM-dd}-%i.log"
+                     immediateFlush="true">
             <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} [%t] %-5level %logger{36} - %msg%n"/>
             <Policies>
                 <TimeBasedTriggeringPolicy interval="1"/>
@@ -17,17 +18,17 @@
     </Appenders>
     
     <Loggers>
-        <Logger name="com.mediamanager" level="debug" additivity="false">
+        <Logger name="com.mediamanager" level="INFO" additivity="false">
             <AppenderRef ref="Console"/>
             <AppenderRef ref="FileAppender"/>
         </Logger>
         
-        <Logger name="org.hibernate" level="info" additivity="false">
+        <Logger name="org.hibernate" level="INFO" additivity="false">
             <AppenderRef ref="Console"/>
             <AppenderRef ref="FileAppender"/>
         </Logger>
         
-        <Root level="info">
+        <Root level="INFO">
             <AppenderRef ref="Console"/>
             <AppenderRef ref="FileAppender"/>
         </Root>