Add `@Action` annotation and `ServiceLocator` for improved handler registration

- Introduce `@Action` annotation to simplify action handler identification and tagging.
- Add `ServiceLocator` for dynamic service registration and retrieval.
- Annotate handlers (`CreateGenreHandler`, `GetGenreHandler`, `UpdateGenreHandler`, `DeleteGenreHandler`, etc.) with corresponding actions.

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

@@ -6,9 +6,11 @@ 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);
 

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

@@ -6,9 +6,11 @@ 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);
 

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

@@ -6,9 +6,11 @@ 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);
 

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

@@ -7,10 +7,12 @@ 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);
 

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

@@ -5,10 +5,12 @@ 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);
 

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

@@ -7,12 +7,14 @@ 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);
 

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

@@ -7,12 +7,14 @@ 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);
 

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

@@ -7,12 +7,14 @@ 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);