package org.apache.stratum.jcs.auxiliary.lateral.javagroups.utils;
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Velocity", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
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*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import java.io.IOException;
import java.io.InterruptedIOException;
import org.javagroups.JChannel;
import org.javagroups.Channel;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.stratum.jcs.auxiliary.lateral.javagroups.behavior.IJGConstants;
import org.apache.stratum.jcs.auxiliary.lateral.behavior.ILateralCacheAttributes;
/**
* Socket openere that will timeout on the initial connect rather than block
* forever. Technique from core java II.
*
* @author <a href="mailto:asmuts@yahoo.com">Aaron Smuts</a>
* @created January 15, 2002
* @version $Id: JGSocketOpener.java,v 1.5 2002/03/01 18:31:57 dlr Exp $
*/
public class JGSocketOpener implements Runnable
{
private final static Log log =
LogFactory.getLog( JGSocketOpener.class );
private ILateralCacheAttributes lca;
private Channel javagroups;
private String groupName;
/**
* Constructor for the <code>SocketOpener</code> object.
*/
public static Channel openSocket( ILateralCacheAttributes lca,
int timeOut, String groupName )
{
JGSocketOpener opener = new JGSocketOpener( lca, groupName );
Thread t = new Thread( opener );
t.start();
try
{
t.join( timeOut );
}
catch ( InterruptedException ire )
{
log.error(ire);
}
return opener.getSocket();
}
/**
* Constructor for the SocketOpener object
*
* @param host
* @param port
*/
public JGSocketOpener( ILateralCacheAttributes lca, String groupName )
{
this.javagroups = null;
this.lca = lca;
this.groupName = groupName;
}
/**
* Main processing method for the <code>SocketOpener</code>
* object.
*/
public void run()
{
try
{
// make configurable
String props="UDP(mcast_addr=" + lca.getUdpMulticastAddr() + ";mcast_port=" + lca.getUdpMulticastPort()+ "):PING:MERGE2(min_interval=5000;max_interval=10000):FD:STABLE:NAKACK:UNICAST:" +
"FRAG:FLUSH:GMS:VIEW_ENFORCER:STATE_TRANSFER:QUEUE";
javagroups = new JChannel(props);
javagroups.setOpt(javagroups.LOCAL, Boolean.FALSE);
// could have a channel per region
//javagroups.connect(IJGConstants.DEFAULT_JG_GROUP_NAME);
javagroups.connect(groupName);
}
catch ( Exception e )
{
log.error(e);
}
}
/**
* Gets the socket attribute of the <code>SocketOpener</code>
* object.
*/
public Channel getSocket()
{
return javagroups;
}
}