org.springframework.web.socket.client.jetty.JettyWebSocketClient.java Source code

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Here is the source code for org.springframework.web.socket.client.jetty.JettyWebSocketClient.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.client.jetty;

import java.net.URI;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.context.SmartLifecycle;
import org.springframework.http.HttpHeaders;
import org.springframework.util.Assert;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.adapter.JettyWebSocketListenerAdapter;
import org.springframework.web.socket.adapter.JettyWebSocketSessionAdapter;
import org.springframework.web.socket.client.WebSocketClient;
import org.springframework.web.socket.client.WebSocketConnectFailureException;
import org.springframework.web.util.UriComponents;
import org.springframework.web.util.UriComponentsBuilder;

/**
 * @author Rossen Stoyanchev
 * @since 4.0
 */
public class JettyWebSocketClient implements WebSocketClient, SmartLifecycle {

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

    private final org.eclipse.jetty.websocket.client.WebSocketClient client;

    private boolean autoStartup = true;

    private int phase = Integer.MAX_VALUE;

    private final Object lifecycleMonitor = new Object();

    public JettyWebSocketClient() {
        this.client = new org.eclipse.jetty.websocket.client.WebSocketClient();
    }

    // TODO: configure Jetty WebSocketClient properties

    public void setAutoStartup(boolean autoStartup) {
        this.autoStartup = autoStartup;
    }

    @Override
    public boolean isAutoStartup() {
        return this.autoStartup;
    }

    public void setPhase(int phase) {
        this.phase = phase;
    }

    @Override
    public int getPhase() {
        return this.phase;
    }

    @Override
    public boolean isRunning() {
        synchronized (this.lifecycleMonitor) {
            return this.client.isStarted();
        }
    }

    @Override
    public void start() {
        synchronized (this.lifecycleMonitor) {
            if (!isRunning()) {
                try {
                    if (logger.isDebugEnabled()) {
                        logger.debug("Starting Jetty WebSocketClient");
                    }
                    this.client.start();
                } catch (Exception e) {
                    throw new IllegalStateException("Failed to start Jetty client", e);
                }
            }
        }
    }

    @Override
    public void stop() {
        synchronized (this.lifecycleMonitor) {
            if (isRunning()) {
                try {
                    if (logger.isDebugEnabled()) {
                        logger.debug("Stopping Jetty WebSocketClient");
                    }
                    this.client.stop();
                } catch (Exception e) {
                    logger.error("Error stopping Jetty WebSocketClient", e);
                }
            }
        }
    }

    @Override
    public void stop(Runnable callback) {
        this.stop();
        callback.run();
    }

    @Override
    public WebSocketSession doHandshake(WebSocketHandler webSocketHandler, String uriTemplate,
            Object... uriVariables) throws WebSocketConnectFailureException {

        UriComponents uriComponents = UriComponentsBuilder.fromUriString(uriTemplate).buildAndExpand(uriVariables)
                .encode();
        return doHandshake(webSocketHandler, null, uriComponents.toUri());
    }

    @Override
    public WebSocketSession doHandshake(WebSocketHandler webSocketHandler, HttpHeaders headers, URI uri)
            throws WebSocketConnectFailureException {

        Assert.notNull(webSocketHandler, "webSocketHandler is required");
        Assert.notNull(uri, "uri is required");

        if (logger.isDebugEnabled()) {
            logger.debug("Connecting to " + uri);
        }

        // TODO: populate headers

        JettyWebSocketSessionAdapter session = new JettyWebSocketSessionAdapter();
        session.setUri(uri);
        session.setRemoteHostName(uri.getHost());

        JettyWebSocketListenerAdapter listener = new JettyWebSocketListenerAdapter(webSocketHandler, session);

        try {
            // TODO: do not block
            this.client.connect(listener, uri).get();
            return session;
        } catch (Exception e) {
            throw new WebSocketConnectFailureException("Failed to connect to " + uri, e);
        }
    }

}