/*
* Copyright 2002-2013 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.web.socket.adapter.standard;
import java.nio.ByteBuffer;
import javax.websocket.CloseReason;
import javax.websocket.Endpoint;
import javax.websocket.EndpointConfig;
import javax.websocket.MessageHandler;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.util.Assert;
import org.springframework.web.socket.BinaryMessage;
import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.PongMessage;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.handler.ExceptionWebSocketHandlerDecorator;
/**
* Adapts a {@link WebSocketHandler} to the standard WebSocket for Java API.
*
* @author Rossen Stoyanchev
* @since 4.0
*/
public class StandardWebSocketHandlerAdapter extends Endpoint {
private static final Log logger = LogFactory.getLog(StandardWebSocketHandlerAdapter.class);
private final WebSocketHandler handler;
private final StandardWebSocketSession wsSession;
public StandardWebSocketHandlerAdapter(WebSocketHandler handler, StandardWebSocketSession wsSession) {
Assert.notNull(handler, "handler must not be null");
Assert.notNull(wsSession, "wsSession must not be null");
this.handler = handler;
this.wsSession = wsSession;
}
@Override
public void onOpen(final javax.websocket.Session session, EndpointConfig config) {
this.wsSession.initializeNativeSession(session);
if (this.handler.supportsPartialMessages()) {
session.addMessageHandler(new MessageHandler.Partial<String>() {
@Override
public void onMessage(String message, boolean isLast) {
handleTextMessage(session, message, isLast);
}
});
session.addMessageHandler(new MessageHandler.Partial<ByteBuffer>() {
@Override
public void onMessage(ByteBuffer message, boolean isLast) {
handleBinaryMessage(session, message, isLast);
}
});
}
else {
session.addMessageHandler(new MessageHandler.Whole<String>() {
@Override
public void onMessage(String message) {
handleTextMessage(session, message, true);
}
});
session.addMessageHandler(new MessageHandler.Whole<ByteBuffer>() {
@Override
public void onMessage(ByteBuffer message) {
handleBinaryMessage(session, message, true);
}
});
}
session.addMessageHandler(new MessageHandler.Whole<javax.websocket.PongMessage>() {
@Override
public void onMessage(javax.websocket.PongMessage message) {
handlePongMessage(session, message.getApplicationData());
}
});
try {
this.handler.afterConnectionEstablished(this.wsSession);
}
catch (Throwable t) {
ExceptionWebSocketHandlerDecorator.tryCloseWithError(this.wsSession, t, logger);
return;
}
}
private void handleTextMessage(javax.websocket.Session session, String payload, boolean isLast) {
TextMessage textMessage = new TextMessage(payload, isLast);
try {
this.handler.handleMessage(this.wsSession, textMessage);
}
catch (Throwable t) {
ExceptionWebSocketHandlerDecorator.tryCloseWithError(this.wsSession, t, logger);
}
}
private void handleBinaryMessage(javax.websocket.Session session, ByteBuffer payload, boolean isLast) {
BinaryMessage binaryMessage = new BinaryMessage(payload, isLast);
try {
this.handler.handleMessage(this.wsSession, binaryMessage);
}
catch (Throwable t) {
ExceptionWebSocketHandlerDecorator.tryCloseWithError(this.wsSession, t, logger);
}
}
private void handlePongMessage(javax.websocket.Session session, ByteBuffer payload) {
PongMessage pongMessage = new PongMessage(payload);
try {
this.handler.handleMessage(this.wsSession, pongMessage);
}
catch (Throwable t) {
ExceptionWebSocketHandlerDecorator.tryCloseWithError(this.wsSession, t, logger);
}
}
@Override
public void onClose(javax.websocket.Session session, CloseReason reason) {
CloseStatus closeStatus = new CloseStatus(reason.getCloseCode().getCode(), reason.getReasonPhrase());
try {
this.handler.afterConnectionClosed(this.wsSession, closeStatus);
}
catch (Throwable t) {
logger.error("Unhandled error for " + this.wsSession, t);
}
}
@Override
public void onError(javax.websocket.Session session, Throwable exception) {
try {
this.handler.handleTransportError(this.wsSession, exception);
}
catch (Throwable t) {
ExceptionWebSocketHandlerDecorator.tryCloseWithError(this.wsSession, t, logger);
}
}
}