/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, 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.resource.adapter.jms.inflow.dlq;
import java.util.HashMap;
import javax.jms.JMSException;
import javax.jms.Message;
/**
* A Generic DLQ Handler
*
* @author <a href="adrian@jboss.com">Adrian Brock</a>
* @version $Revision: 71554 $
*/
public class GenericDLQHandler extends JBossMQDLQHandler
{
/** Resent messages Map<MessageID, Integer> */
protected HashMap resent = new HashMap();
public void messageDelivered(Message msg)
{
try
{
String id = msg.getJMSMessageID();
if (id == null)
{
log.error("Message id is null? " + msg);
return;
}
clearResentCounter(id);
}
catch (Throwable t)
{
log.warn("Unexpected error processing delivery notification " + msg, t);
}
}
protected boolean handleDelivery(Message msg)
{
// Check for JBossMQ specific
boolean handled = super.handleDelivery(msg);
if (handled)
return true;
try
{
if (msg.propertyExists(JMS_JBOSS_REDELIVERY_COUNT))
return false;
String id = msg.getJMSMessageID();
if (id == null)
{
log.error("Message id is null? " + msg);
return false;
}
int count = 0;
try
{
if (msg.propertyExists(PROPERTY_DELIVERY_COUNT))
count = msg.getIntProperty(PROPERTY_DELIVERY_COUNT) - 1;
}
catch (JMSException ignored)
{
count = incrementResentCounter(id);
}
int max = maxResent;
if (msg.propertyExists(JMS_JBOSS_REDELIVERY_LIMIT))
max = msg.getIntProperty(JMS_JBOSS_REDELIVERY_LIMIT);
if (count > max)
{
warnDLQ(msg, count, max);
clearResentCounter(id);
return true;
}
}
catch (Throwable t)
{
log.warn("Unexpected error checking whether dlq should be used " + msg, t);
}
return false;
}
/**
* Increment the resent counter for the message id
*
* @param id the message id of the message
*/
protected int incrementResentCounter(String id)
{
ResentInfo info;
synchronized (resent)
{
info = (ResentInfo) resent.get(id);
if (info == null)
{
info = new ResentInfo();
resent.put(id, info);
}
}
return ++info.count;
}
/**
* Remove the resent counter for the message id
*
* @param id the message id of the message
*/
protected void clearResentCounter(String id)
{
synchronized (resent)
{
resent.remove(id);
}
}
/**
* Resent Info
*/
protected static class ResentInfo
{
int count = 0;
}
}