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/**
* This file is part of the CRISTAL-iSE kernel.
* Copyright (c) 2001-2014 The CRISTAL Consortium. All rights reserved.
*
* This library 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 library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; with out 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 library; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* http://www.fsf.org/licensing/licenses/lgpl.html
*/
package org.cristalise.kernel.entity.proxy;
import java.util.ArrayList;
import java.util.concurrent.LinkedBlockingQueue;
import org.cristalise.kernel.process.Gateway;
import org.cristalise.kernel.utils.Logger;
import org.cristalise.kernel.utils.server.SimpleTCPIPServer;
public class ProxyServer implements Runnable {
// server objects
ArrayList<ProxyClientConnection> proxyClients;
SimpleTCPIPServer proxyListener = null;
String serverName = null;
boolean keepRunning = true;
LinkedBlockingQueue<ProxyMessage> messageQueue;
public ProxyServer(String serverName) {
Logger.msg(5, "ProxyManager::initServer - Starting.....");
int port = Gateway.getProperties().getInt("ItemServer.Proxy.port", 0);
this.serverName = serverName;
this.proxyClients = new ArrayList<ProxyClientConnection>();
this.messageQueue = new LinkedBlockingQueue<ProxyMessage>();
if (port == 0) {
Logger.error("ItemServer.Proxy.port not defined in connect file. Remote proxies will not be informed of changes.");
return;
}
// set up the proxy server
try {
Logger.msg(5, "ProxyManager::initServer - Initialising proxy informer on port "+port);
proxyListener = new SimpleTCPIPServer(port, ProxyClientConnection.class, 200);
proxyListener.startListening();
} catch (Exception ex) {
Logger.error("Error setting up Proxy Server. Remote proxies will not be informed of changes.");
Logger.error(ex);
}
// start the message queue delivery thread
new Thread(this).start();
}
@Override
public void run() {
while(keepRunning) {
ProxyMessage message = messageQueue.poll();
if (message != null) {
synchronized(proxyClients) {
for (ProxyClientConnection client : proxyClients) {
client.sendMessage(message);
}
}
} else
try {
synchronized(this) {
if (messageQueue.isEmpty()) wait();
}
} catch (InterruptedException e) { }
}
}
public String getServerName() {
return serverName;
}
public void sendProxyEvent(ProxyMessage message) {
try {
synchronized(this) {
messageQueue.put(message);
notify();
}
} catch (InterruptedException e) { }
}
public void reportConnections(int logLevel) {
synchronized(proxyClients) {
Logger.msg(logLevel, "Currently connected proxy clients:");
for (ProxyClientConnection client : proxyClients) {
Logger.msg(logLevel, " "+client);
}
}
}
public void shutdownServer() {
Logger.msg(1, "ProxyManager: Closing Server.");
proxyListener.stopListening();
synchronized(this) {
keepRunning = false;
notify();
}
}
public void registerProxyClient(ProxyClientConnection client) {
synchronized(proxyClients) {
proxyClients.add(client);
}
}
public void unRegisterProxyClient(ProxyClientConnection client) {
synchronized(proxyClients) {
proxyClients.remove(client);
}
}
}
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