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MediaManager-core
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Integrate `DelegateActionManager` for request handling and refactor IPC: 

- Replaced `SimpleProtocol` with `TransportProtocol` in `IPCManager`.
- Added `DelegateActionManager` to route requests to handlers, starting with `EchoHandler`.
- Updated `MediaManagerApplication` to initialize and manage `DelegateActionManager`.
- Extended Protocol Buffers schema with `Request` and `Response` definitions.
- Enhanced logging for request processing and redesigned response flow.
This commit is contained in:
Gustavo Henrique Santos Souza de Miranda 2025-11-17 07:21:52 -03:00
parent 23b6d54674
commit a0ad10b1bc
6 changed files with 133 additions and 35 deletions
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10
src/main/java/com/mediamanager/MediaManagerApplication.java
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@ -1,5 +1,6 @@
package com.mediamanager;
import com.mediamanager.service.delegate.DelegateActionManager;
import com.mediamanager.service.ipc.IPCManager;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
@ -14,6 +15,7 @@ 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 static void main(String[] args) {
@ -24,8 +26,9 @@ public class MediaManagerApplication {
loadConfiguration();
databaseManager = new DatabaseManager(config);
databaseManager.init();
ipcManager = new IPCManager(config);
actionManager = new DelegateActionManager();
actionManager.start();
ipcManager = new IPCManager(config,actionManager);
ipcManager.init();
// TODO: Start application services
@ -51,6 +54,9 @@ public class MediaManagerApplication {
}
}
if (actionManager != null) {
actionManager.stop();
}
logger.info("MediaManager Core shutdown successfully");
logger.info("Goodbye!");

11
src/main/java/com/mediamanager/service/delegate/ActionHandler.java Normal file
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@ -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;
}

60
src/main/java/com/mediamanager/service/delegate/DelegateActionManager.java Normal file
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@ -0,0 +1,60 @@
package com.mediamanager.service.delegate;
import com.google.protobuf.ByteString;
import com.mediamanager.protocol.TransportProtocol;
import com.mediamanager.service.delegate.handler.EchoHandler;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import java.util.HashMap;
import java.util.Map;
public class DelegateActionManager {
private static final Logger logger = LogManager.getLogger(DelegateActionManager.class);
private final Map<String, ActionHandler> handlerRegistry;
public DelegateActionManager() {
logger.debug("DelegateActionManager created");
this.handlerRegistry = new HashMap<>();
registerHandlers();
}
private void registerHandlers() {
handlerRegistry.put("echo",new EchoHandler());
}
public void start(){
logger.info("DelegateActionManager started");
}
public void stop(){
logger.info("DelegateActionManager stopped");
}
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();
}
}

17
src/main/java/com/mediamanager/service/delegate/handler/EchoHandler.java Normal file
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@ -0,0 +1,17 @@
package com.mediamanager.service.delegate.handler;
import com.google.protobuf.ByteString;
import com.mediamanager.protocol.TransportProtocol;
import com.mediamanager.service.delegate.ActionHandler;
public class EchoHandler implements ActionHandler {
@Override
public TransportProtocol.Response.Builder handle(ByteString requestPayload) {
String payloadText = requestPayload.toStringUtf8();
String responseText = "Server received: " + payloadText;
return TransportProtocol.Response.newBuilder()
.setPayload(ByteString.copyFromUtf8(responseText))
.setStatusCode(200);
}
}

52
src/main/java/com/mediamanager/service/ipc/IPCManager.java
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@ -1,12 +1,11 @@
package com.mediamanager.service.ipc;
import com.mediamanager.protocol.SimpleProtocol;
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.nio.ByteBuffer;
import java.io.File;
import java.io.IOException;
import java.net.StandardProtocolFamily;
import java.net.UnixDomainSocketAddress;
@ -28,6 +27,8 @@ 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;
@ -37,8 +38,9 @@ public class IPCManager {
private final AtomicInteger clientIdCounter = new AtomicInteger(0);
public IPCManager(Properties config){
public IPCManager(Properties config, DelegateActionManager actionManager){
configuration = config;
this.actionManager = actionManager;
logger.debug("IPCManager created with configuration:");
@ -221,29 +223,25 @@ public class IPCManager {
logger.debug("Client {} handler thread started", clientId);
try {
SimpleProtocol.TextMessage request = readMessage(channel);
TransportProtocol.Request request = readRequest(channel);
if (request != null) {
logger.info("Client {} sent: '{}'", clientId, request.getContent());
String response = "Server Received: " + request.getContent();
logger.info("Client {} sent request {}", clientId, request.getRequestId());
SimpleProtocol.TextMessage responseMsg = SimpleProtocol.TextMessage.newBuilder()
.setContent(response).build();
// Processa usando o DelegateActionManager
TransportProtocol.Response response = actionManager.ProcessedRequest(request);
writeMessage(channel,responseMsg);
logger.info("Client {} response sent: '{}'", clientId, response);
// Envia resposta de volta
writeResponse(channel, response);
logger.info("Client {} response sent", clientId);
} else {
logger.warn("Client {} sent null message", clientId);
}
Thread.sleep(100);
logger.debug("Client {} processing complete", clientId);
} catch (Exception e) {
logger.error("Error handling client {}", clientId, e);
} finally {
// SEMPRE fecha o canal quando terminar
// O finally garante que isso acontece mesmo se houver exceção
try {
channel.close();
logger.debug("Client {} channel closed", clientId);
@ -252,8 +250,7 @@ public class IPCManager {
}
}
}
private SimpleProtocol.TextMessage readMessage(SocketChannel channel) throws IOException {
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;
@ -294,28 +291,25 @@ public class IPCManager {
byte[] messageBytes = new byte[messageSize];
messageBuffer.get(messageBytes);
return SimpleProtocol.TextMessage.parseFrom(messageBytes);
return TransportProtocol.Request.parseFrom(messageBytes);
}
private void writeMessage(SocketChannel channel, SimpleProtocol.TextMessage message) throws IOException {
// Serializa a mensagem
byte[] messageBytes = message.toByteArray();
private void writeResponse(SocketChannel channel, TransportProtocol.Response response) throws IOException {
byte[] messageBytes = response.toByteArray();
int messageSize = messageBytes.length;
logger.debug("Writing message of {} bytes", messageSize);
logger.debug("Writing response of {} bytes", messageSize);
// Cria buffer com tamanho + mensagem
java.nio.ByteBuffer buffer = java.nio.ByteBuffer.allocate(4 + messageSize);
buffer.putInt(messageSize); // 4 bytes de tamanho
buffer.put(messageBytes); // N bytes da mensagem
buffer.putInt(messageSize);
buffer.put(messageBytes);
buffer.flip();
// Escreve tudo no canal
while (buffer.hasRemaining()) {
channel.write(buffer);
}
logger.debug("Message written successfully");
logger.debug("Response written successfully");
}
}
}

16
src/main/proto/messages.proto
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@ -1,9 +1,19 @@
syntax = "proto3";
option java_package = "com.mediamanager.protocol";
option java_outer_classname = "SimpleProtocol";
option java_outer_classname = "TransportProtocol";
package mediamanager;
message TextMessage {
string content = 1; // O texto da mensagem
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;
}