org.springframework.web.socket.adapter.JettyWebSocketHandlerAdapter.java Source code

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Here is the source code for org.springframework.web.socket.adapter.JettyWebSocketHandlerAdapter.java

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/*
 * 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;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.jetty.websocket.api.Session;
import org.eclipse.jetty.websocket.api.WebSocketListener;
import org.springframework.util.Assert;
import org.springframework.web.socket.BinaryMessage;
import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.support.ExceptionWebSocketHandlerDecorator;

/**
 * Adapts {@link WebSocketHandler} to the Jetty 9 WebSocket API.
 *
 * @author Phillip Webb
 * @author Rossen Stoyanchev
 * @since 4.0
 */
public class JettyWebSocketHandlerAdapter implements WebSocketListener {

    private static final Log logger = LogFactory.getLog(JettyWebSocketHandlerAdapter.class);

    private final WebSocketHandler webSocketHandler;

    private final JettyWebSocketSession wsSession;

    public JettyWebSocketHandlerAdapter(WebSocketHandler webSocketHandler, JettyWebSocketSession wsSession) {
        Assert.notNull(webSocketHandler, "webSocketHandler must not be null");
        Assert.notNull(wsSession, "wsSession must not be null");
        this.webSocketHandler = webSocketHandler;
        this.wsSession = wsSession;
    }

    @Override
    public void onWebSocketConnect(Session session) {
        try {
            this.wsSession.initializeNativeSession(session);
            this.webSocketHandler.afterConnectionEstablished(this.wsSession);
        } catch (Throwable t) {
            ExceptionWebSocketHandlerDecorator.tryCloseWithError(this.wsSession, t, logger);
        }
    }

    @Override
    public void onWebSocketText(String payload) {
        TextMessage message = new TextMessage(payload);
        try {
            this.webSocketHandler.handleMessage(this.wsSession, message);
        } catch (Throwable t) {
            ExceptionWebSocketHandlerDecorator.tryCloseWithError(this.wsSession, t, logger);
        }
    }

    @Override
    public void onWebSocketBinary(byte[] payload, int offset, int len) {
        BinaryMessage message = new BinaryMessage(payload, offset, len, true);
        try {
            this.webSocketHandler.handleMessage(this.wsSession, message);
        } catch (Throwable t) {
            ExceptionWebSocketHandlerDecorator.tryCloseWithError(this.wsSession, t, logger);
        }
    }

    @Override
    public void onWebSocketClose(int statusCode, String reason) {
        CloseStatus closeStatus = new CloseStatus(statusCode, reason);
        try {
            this.webSocketHandler.afterConnectionClosed(this.wsSession, closeStatus);
        } catch (Throwable t) {
            logger.error("Unhandled error for " + this.wsSession, t);
        }
    }

    @Override
    public void onWebSocketError(Throwable cause) {
        try {
            this.webSocketHandler.handleTransportError(this.wsSession, cause);
        } catch (Throwable t) {
            ExceptionWebSocketHandlerDecorator.tryCloseWithError(this.wsSession, t, logger);
        }
    }

}