/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This 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 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.clustering.jgroups;
import org.jgroups.Event;
import org.jgroups.JChannel;
import org.jgroups.UpHandler;
import org.jgroups.blocks.mux.MuxUpHandler;
import org.jgroups.blocks.mux.Muxer;
import org.jgroups.conf.ProtocolStackConfigurator;
/**
* A JGroups channel that uses a MuxUpHandler by default.
* @author Paul Ferraro
*/
public class MuxChannel extends JChannel {
public MuxChannel(ProtocolStackConfigurator configurator) throws Exception {
super(configurator);
this.setUpHandler(new ClassLoaderAwareMuxUpHandler());
}
@Override
public void setUpHandler(UpHandler handler) {
UpHandler existingHandler = this.getUpHandler();
if ((existingHandler != null) && (existingHandler instanceof Muxer)) {
@SuppressWarnings("unchecked")
Muxer<UpHandler> muxer = (Muxer<UpHandler>) existingHandler;
muxer.setDefaultHandler(handler);
} else {
super.setUpHandler(handler);
}
}
/**
* Custom muxing up handler that decorates registered up handlers with class loader awareness.
*/
private static class ClassLoaderAwareMuxUpHandler extends MuxUpHandler {
@Override
public void add(short id, UpHandler handler) {
super.add(id, this.getUpHandler(handler));
}
@Override
public Object up(Event event) {
return super.up(event);
}
@Override
public void setDefaultHandler(UpHandler handler) {
super.setDefaultHandler(this.getUpHandler(handler));
}
private UpHandler getUpHandler(UpHandler handler) {
return (handler instanceof ClassLoaderAwareUpHandler) ? handler : new ClassLoaderAwareUpHandler(handler);
}
}
}