feat: Added AutoCloseable interface

mcp/src/main/java/io/modelcontextprotocol/client/LifecycleInitializer.java

@@ -72,7 +72,7 @@
  * the initialized notification</li>
  * </ul>
  */
-class LifecycleInitializer {
+class LifecycleInitializer implements AutoCloseable {
 
 	private static final Logger logger = LoggerFactory.getLogger(LifecycleInitializer.class);
 
@@ -326,6 +326,7 @@ private Mono<McpSchema.InitializeResult> doInitialize(DefaultInitialization init
 	/**
 	 * Closes the current initialization if it exists.
 	 */
+	@Override
 	public void close() {
 		DefaultInitialization current = this.initializationRef.getAndSet(null);
 		if (current != null) {

mcp/src/main/java/io/modelcontextprotocol/client/McpAsyncClient.java

@@ -78,7 +78,7 @@
  * @see McpClientSession
  * @see McpClientTransport
  */
-public class McpAsyncClient {
+public class McpAsyncClient implements AutoCloseable {
 
 	private static final Logger logger = LoggerFactory.getLogger(McpAsyncClient.class);
 
@@ -315,6 +315,7 @@ public McpSchema.Implementation getClientInfo() {
 	/**
 	 * Closes the client connection immediately.
 	 */
+	@Override
 	public void close() {
 		this.initializer.close();
 		this.transport.close();

mcp/src/main/java/io/modelcontextprotocol/server/McpAsyncServer.java

@@ -82,7 +82,7 @@
  * @see McpSchema
  * @see McpClientSession
  */
-public class McpAsyncServer {
+public class McpAsyncServer implements AutoCloseable {
 
 	private static final Logger logger = LoggerFactory.getLogger(McpAsyncServer.class);
 
@@ -254,6 +254,7 @@ public Mono<Void> closeGracefully() {
 	/**
 	 * Close the server immediately.
 	 */
+	@Override
 	public void close() {
 		this.mcpTransportProvider.close();
 	}

mcp/src/main/java/io/modelcontextprotocol/server/McpSyncServer.java

@@ -48,7 +48,7 @@
  * @see McpAsyncServer
  * @see McpSchema
  */
-public class McpSyncServer {
+public class McpSyncServer implements AutoCloseable {
 
 	/**
 	 * The async server to wrap.
@@ -203,6 +203,7 @@ public void closeGracefully() {
 	/**
 	 * Close the server immediately.
 	 */
+	@Override
 	public void close() {
 		this.asyncServer.close();
 	}

mcp/src/main/java/io/modelcontextprotocol/spec/McpServerTransportProvider.java

@@ -29,7 +29,7 @@
  *
  * @author Dariusz Jędrzejczyk
  */
-public interface McpServerTransportProvider {
+public interface McpServerTransportProvider extends AutoCloseable {
 
 	/**
 	 * Sets the session factory that will be used to create sessions for new clients. An
@@ -52,6 +52,7 @@ public interface McpServerTransportProvider {
 	 * Immediately closes all the transports with connected clients and releases any
 	 * associated resources.
 	 */
+	@Override
 	default void close() {
 		this.closeGracefully().subscribe();
 	}

mcp/src/main/java/io/modelcontextprotocol/spec/McpSession.java

@@ -21,7 +21,7 @@
  * @author Christian Tzolov
  * @author Dariusz Jędrzejczyk
  */
-public interface McpSession {
+public interface McpSession extends AutoCloseable {
 
 	/**
 	 * Sends a request to the model counterparty and expects a response of type T.
@@ -75,6 +75,7 @@ default Mono<Void> sendNotification(String method) {
 	/**
 	 * Closes the session and releases any associated resources.
 	 */
+	@Override
 	void close();
 
 }

mcp/src/main/java/io/modelcontextprotocol/spec/McpTransport.java

@@ -35,7 +35,7 @@
  * @author Christian Tzolov
  * @author Dariusz Jędrzejczyk
  */
-public interface McpTransport {
+public interface McpTransport extends AutoCloseable {
 
 	/**
 	 * Closes the transport connection and releases any associated resources.
@@ -45,6 +45,7 @@ public interface McpTransport {
 	 * needed. It should handle the graceful shutdown of any active connections.
 	 * </p>
 	 */
+	@Override
 	default void close() {
 		this.closeGracefully().subscribe();
 	}

mcp/src/main/java/io/modelcontextprotocol/spec/McpTransportSession.java

@@ -14,7 +14,7 @@
  * manages.
  * @author Dariusz Jędrzejczyk
  */
-public interface McpTransportSession<CONNECTION> {
+public interface McpTransportSession<CONNECTION> extends AutoCloseable {
 
 	/**
 	 * In case of stateful MCP servers, the value is present and contains the String
@@ -49,6 +49,7 @@ public interface McpTransportSession<CONNECTION> {
 	/**
 	 * Close and clear the monitored resources. Potentially asynchronous.
 	 */
+	@Override
 	void close();
 
 	/**