/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt 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.jms.client.delegate;
import java.util.Map;
import java.io.Serializable;
import org.jboss.jms.server.endpoint.CreateConnectionResult;
import org.jboss.jms.delegate.ConnectionFactoryDelegate;
import org.jboss.jms.client.plugin.LoadBalancingPolicy;
import org.jboss.jms.util.MessagingNetworkFailureException;
import org.jboss.messaging.core.plugin.IDBlock;
import org.jboss.logging.Logger;
import javax.jms.JMSException;
/**
* A ClientClusteredConnectionFactoryDelegate.
*
* It DOESN'T extend DelegateSupport, because none of DelegateSupport's attributes make sense here:
* there is no corresponding enpoint on the server, there's no ID, etc. This is just a "shallow"
* delegate, that in turn delegates to its sub-delegates (ClientConnectionFactoryDelegate instances)
*
* @author <a href="mailto:ovidiu@jboss.org">Ovidiu Feodorov</a>
* @author <a href="mailto:clebert.suconic@jboss.org">Clebert Suconic</a>
* @author <a href="mailto:tim.fox@jboss.com">Tim Fox</a>
*
* @version <tt>$Revision: 2485 $</tt>
*
* $Id: ClientClusteredConnectionFactoryDelegate.java 2485 2007-02-28 02:30:33Z ovidiu.feodorov@jboss.com $
*/
public class ClientClusteredConnectionFactoryDelegate
implements Serializable, ConnectionFactoryDelegate
{
// Constants ------------------------------------------------------------------------------------
private static final long serialVersionUID = 8286850860206289277L;
private static final Logger log =
Logger.getLogger(ClientClusteredConnectionFactoryDelegate.class);
// Static ---------------------------------------------------------------------------------------
// Attributes -----------------------------------------------------------------------------------
private ClientConnectionFactoryDelegate[] delegates;
// Map <Integer(nodeID)->Integer(failoverNodeID)>
private Map failoverMap;
private LoadBalancingPolicy loadBalancingPolicy;
// Constructors ---------------------------------------------------------------------------------
public ClientClusteredConnectionFactoryDelegate(ClientConnectionFactoryDelegate[] delegates,
Map failoverMap,
LoadBalancingPolicy loadBalancingPolicy)
{
this.delegates = delegates;
this.failoverMap = failoverMap;
this.loadBalancingPolicy = loadBalancingPolicy;
}
// ConnectionFactoryDelegate implementation -----------------------------------------------------
public synchronized byte[] getClientAOPStack() throws JMSException
{
// Use one of the non-clustered ConnectionFactory delegates to retrieve the client AOP stack
// from one of the nodes.
for (int server = 0; server < delegates.length; server++)
{
try
{
ConnectionFactoryDelegate aopStackProvider = delegates[server];
log.debug("getting AOP stack from " + aopStackProvider);
return aopStackProvider.getClientAOPStack();
}
catch (MessagingNetworkFailureException e)
{
log.warn("Server" + 0 + " was broken, loading AOP from next delegate", e);
}
}
throw new MessagingNetworkFailureException(
"Failed to download and/or install client side AOP stack");
}
/**
* This invocation should either be handled by the client-side interceptor chain or by the
* server-side endpoint.
*/
public CreateConnectionResult createConnectionDelegate(String username, String password,
int failedNodeID) throws JMSException
{
throw new IllegalStateException("This invocation should not be handled here!");
}
/**
* This invocation should either be handled by the client-side interceptor chain or by the
* server-side endpoint.
*/
public IDBlock getIdBlock(int size) throws JMSException
{
throw new IllegalStateException("This invocation should not be handled here!");
}
// Public ---------------------------------------------------------------------------------------
public ClientConnectionFactoryDelegate[] getDelegates()
{
return delegates;
}
public void setDelegates(ClientConnectionFactoryDelegate[] dels)
{
this.delegates = dels;
loadBalancingPolicy.updateView(dels);
}
public Map getFailoverMap()
{
return failoverMap;
}
public void setFailoverMap(Map failoverMap)
{
this.failoverMap = failoverMap;
}
public LoadBalancingPolicy getLoadBalancingPolicy()
{
return loadBalancingPolicy;
}
/** Method used to update the delegate and failoverMap during viewChange */
public synchronized void updateFailoverInfo(ClientConnectionFactoryDelegate[] delegates,
Map failoverMap)
{
this.delegates = delegates;
this.failoverMap = failoverMap;
loadBalancingPolicy.updateView(delegates);
}
public String toString()
{
StringBuffer sb = new StringBuffer("ClusteredConnectionFactoryDelegate[");
if (delegates == null)
{
sb.append("-]");
}
else
{
sb.append("SIDs={");
for(int i = 0; i < delegates.length; i++)
{
sb.append(delegates[i].getServerID());
if (i < delegates.length - 1)
{
sb.append(',');
}
}
sb.append("}]");
}
return sb.toString();
}
// Package protected ----------------------------------------------------------------------------
// Protected ------------------------------------------------------------------------------------
// Private --------------------------------------------------------------------------------------
// Inner classes --------------------------------------------------------------------------------
}