Add missing @Override annotations

spring-websocket/src/main/java/org/springframework/web/socket/AbstractWebSocketMessage.java

@@ -60,6 +60,7 @@ public abstract class AbstractWebSocketMessage<T> implements WebSocketMessage<T>
 	/**
 	 * Return the message payload (never {@code null}).
 	 */
+	@Override
 	public T getPayload() {
 		return this.payload;
 	}
@@ -67,6 +68,7 @@ public abstract class AbstractWebSocketMessage<T> implements WebSocketMessage<T>
 	/**
 	 * Whether this is the last part of a message sent as a series of partial messages.
 	 */
+	@Override
 	public boolean isLast() {
 		return this.last;
 	}

spring-websocket/src/main/java/org/springframework/web/socket/adapter/standard/StandardWebSocketSession.java

@@ -139,6 +139,7 @@ public class StandardWebSocketSession extends AbstractWebSocketSession<Session>
 		return this.extensions;
 	}
 
+	@Override
 	public Principal getPrincipal() {
 		return this.user;
 	}

spring-websocket/src/main/java/org/springframework/web/socket/config/WebSocketMessageBrokerStats.java

@@ -209,6 +209,7 @@ public class WebSocketMessageBrokerStats {
 		return str.substring(str.indexOf("pool"), str.length() - 1);
 	}
 
+	@Override
 	public String toString() {
 		return "WebSocketSession[" + getWebSocketSessionStatsInfo() + "]" +
 				", stompSubProtocol[" + getStompSubProtocolStatsInfo() + "]" +

spring-websocket/src/main/java/org/springframework/web/socket/messaging/DefaultSimpUserRegistry.java

@@ -169,6 +169,7 @@ public class DefaultSimpUserRegistry implements SimpUserRegistry, SmartApplicati
 		return this.users.size();
 	}
 
+	@Override
 	public Set<SimpSubscription> findSubscriptions(SimpSubscriptionMatcher matcher) {
 		Set<SimpSubscription> result = new HashSet<>();
 		for (LocalSimpSession session : this.sessions.values()) {

spring-websocket/src/main/java/org/springframework/web/socket/messaging/StompSubProtocolHandler.java

@@ -221,6 +221,7 @@ public class StompSubProtocolHandler implements SubProtocolHandler, ApplicationE
 	/**
 	 * Handle incoming WebSocket messages from clients.
 	 */
+	@Override
 	public void handleMessageFromClient(WebSocketSession session,
 			WebSocketMessage<?> webSocketMessage, MessageChannel outputChannel) {
 
@@ -716,6 +717,7 @@ public class StompSubProtocolHandler implements SubProtocolHandler, ApplicationE
 			return this.disconnect.get();
 		}
 
+		@Override
 		public String toString() {
 			return "processed CONNECT(" + this.connect.get() + ")-CONNECTED(" +
 					this.connected.get() + ")-DISCONNECT(" + this.disconnect.get() + ")";

spring-websocket/src/main/java/org/springframework/web/socket/messaging/SubProtocolWebSocketHandler.java

@@ -187,6 +187,7 @@ public class SubProtocolWebSocketHandler
 	/**
 	 * Return all supported protocols.
 	 */
+	@Override
 	public List<String> getSubProtocols() {
 		return new ArrayList<>(this.protocolHandlerLookup.keySet());
 	}
@@ -676,6 +677,7 @@ public class SubProtocolWebSocketHandler
 			}
 		}
 
+		@Override
 		public String toString() {
 			return SubProtocolWebSocketHandler.this.sessions.size() +
 					" current WS(" + this.webSocket.get() +

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/client/AbstractXhrTransport.java

@@ -82,6 +82,7 @@ public abstract class AbstractXhrTransport implements XhrTransport {
 	/**
 	 * Whether XHR streaming is disabled or not.
 	 */
+	@Override
 	public boolean isXhrStreamingDisabled() {
 		return this.xhrStreamingDisabled;
 	}

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/TransportHandlingSockJsService.java

@@ -135,6 +135,7 @@ public class TransportHandlingSockJsService extends AbstractSockJsService implem
 		this.messageCodec = messageCodec;
 	}
 
+	@Override
 	public SockJsMessageCodec getMessageCodec() {
 		Assert.state(this.messageCodec != null, "A SockJsMessageCodec is required but not available: " +
 				"Add Jackson to the classpath, or configure a custom SockJsMessageCodec.");

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/session/AbstractHttpSockJsSession.java

@@ -137,6 +137,7 @@ public abstract class AbstractHttpSockJsSession extends AbstractSockJsSession {
 	/**
 	 * Return the selected sub-protocol to use.
 	 */
+	@Override
 	@Nullable
 	public String getAcceptedProtocol() {
 		return this.acceptedProtocol;

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/session/AbstractSockJsSession.java

@@ -162,6 +162,7 @@ public abstract class AbstractSockJsSession implements SockJsSession {
 
 	// Message sending
 
+	@Override
 	public final void sendMessage(WebSocketMessage<?> message) throws IOException {
 		Assert.state(!isClosed(), "Cannot send a message when session is closed");
 		Assert.isInstanceOf(TextMessage.class, message, "SockJS supports text messages only");

spring-websocket/src/test/java/org/springframework/web/socket/handler/TestWebSocketSession.java

@@ -137,6 +137,7 @@ public class TestWebSocketSession implements WebSocketSession {
 		this.remoteAddress = remoteAddress;
 	}
 
+	@Override
 	public String getAcceptedProtocol() {
 		return this.protocol;
 	}

spring-websocket/src/test/java/org/springframework/web/socket/server/support/HandshakeInterceptorChainTests.java

@@ -53,6 +53,7 @@ public class HandshakeInterceptorChainTests extends AbstractHttpRequestTests {
 	private Map<String, Object> attributes;
 
 
+	@Override
 	@BeforeEach
 	public void setup() {
 		super.setup();

spring-websocket/src/test/java/org/springframework/web/socket/sockjs/transport/session/StubSockJsServiceConfig.java

@@ -74,6 +74,7 @@ public class StubSockJsServiceConfig implements SockJsServiceConfig {
 		this.messageCodec = messageCodec;
 	}
 
+	@Override
 	public int getHttpMessageCacheSize() {
 		return this.httpMessageCacheSize;
 	}