/**
* Copyright 2010 Google Inc.
*
* 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.waveprotocol.box.server.rpc;
import com.sixfire.websocket.WebSocket;
import org.waveprotocol.wave.util.logging.Log;
import java.io.IOException;
import java.util.concurrent.ExecutorService;
/**
* The client side of a WebSocketChannel.
*/
class WebSocketClientChannel extends WebSocketChannel {
private static final Log LOG = Log.get(WebSocketClientChannel.class);
private final WebSocket websocket;
private final ExecutorService threadPool;
private final Runnable asyncRead = new Runnable() {
@Override
public void run() {
try {
String data;
while ((data = websocket.recv()) != null) {
handleMessageString(data);
}
} catch (IOException e) {
LOG.severe("WebSocket async data read failed, aborting connection.", e);
}
}
};
private boolean isReading = false;
/**
* Constructs a WebSocketClientChannel.
*
* @param websocket connected websocket
* @param callback ProtoCallback handler for incoming messages
* @param threadPool threadpool for thread that performs async read.
*/
public WebSocketClientChannel(WebSocket websocket, ProtoCallback callback,
ExecutorService threadPool) {
super(callback);
this.websocket = websocket;
this.threadPool = threadPool;
}
/**
* Start reading asynchronously from the websocket client.
*/
@Override
public void startAsyncRead() {
if (isReading) {
throw new IllegalStateException("This websocket is already reading asynchronously.");
}
threadPool.execute(asyncRead);
isReading = true;
}
/**
* Propagate a String message to the websocket client.
*/
@Override
public void sendMessageString(String data) throws IOException {
websocket.send(data);
}
}