// ---------------------------------------------------------------------------
// jWebSocket - Time Stream
// Copyright (c) 2010 Alexander Schulze, Innotrade GmbH
// ---------------------------------------------------------------------------
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published by the
// Free Software Foundation; either version 3 of the License, or (at your
// option) any later version.
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
// more details.
// You should have received a copy of the GNU Lesser General Public License along
// with this program; if not, see <http://www.gnu.org/licenses/lgpl.html>.
// ---------------------------------------------------------------------------
package org.jwebsocket.plugins.streaming;
import java.util.Date;
import org.apache.log4j.Logger;
import org.jwebsocket.logging.Logging;
import org.jwebsocket.server.TokenServer;
import org.jwebsocket.token.Token;
import org.jwebsocket.token.TokenFactory;
/**
* implements the TimeStream, primarily for demonstration purposes but it can
* also be used for client/server time synchronization. It implements an
* internal thread which broadcasts the current system time of the server to
* the registered clients once per second.
* @author aschulze
*/
public class TimeStream extends TokenStream {
private static Logger log = Logging.getLogger(TimeStream.class);
private Boolean mIsRunning = false;
private TimerProcess mTimeProcess = null;
private Thread mTimeThread = null;
/**
*
*
* @param aStreamID
* @param aServer
*/
public TimeStream(String aStreamID, TokenServer aServer) {
super(aStreamID, aServer);
startStream(-1);
}
/**
*
*/
@Override
public void startStream(long aTimeout) {
super.startStream(aTimeout);
if (log.isDebugEnabled()) {
log.debug("Starting Time stream...");
}
mTimeProcess = new TimerProcess();
mTimeThread = new Thread(mTimeProcess);
mTimeThread.start();
}
/**
*
*/
@Override
public void stopStream(long aTimeout) {
if (log.isDebugEnabled()) {
log.debug("Stopping Time stream...");
}
long lStarted = new Date().getTime();
mIsRunning = false;
try {
mTimeThread.join(aTimeout);
} catch (Exception lEx) {
log.error(lEx.getClass().getSimpleName() + ": " + lEx.getMessage());
}
if (log.isDebugEnabled()) {
long lDuration = new Date().getTime() - lStarted;
if (mTimeThread.isAlive()) {
log.warn("Time stream did not stopped after " + lDuration + "ms.");
} else {
log.debug("Time stream stopped after " + lDuration + "ms.");
}
}
super.stopStream(aTimeout);
}
private class TimerProcess implements Runnable {
@Override
public void run() {
if (log.isDebugEnabled()) {
log.debug("Running time stream...");
}
mIsRunning = true;
while (mIsRunning) {
try {
Thread.sleep(1000);
Token lToken = TokenFactory.createToken("event");
lToken.setString("name", "stream");
lToken.setString("msg", new Date().toString());
lToken.setString("streamID", getStreamID());
// keep this her for demo purposes
/*
FastMap<String, Object> lRecord = new FastMap<String, Object>();
lRecord.put("string_field", "value");
lRecord.put("int_field", 4711);
lToken.setMap("record", lRecord);
*/
// log.debug("Time streamer queues '" + lData + "'...");
put(lToken);
} catch (InterruptedException lEx) {
log.error("(run) " + lEx.getClass().getSimpleName() + ": " + lEx.getMessage());
}
}
if (log.isDebugEnabled()) {
log.debug("Time stream stopped.");
}
}
}
}