package org.jboss.test.cts.ejb;
import javax.ejb.MessageDrivenBean;
import javax.ejb.MessageDrivenContext;
import javax.ejb.EJBException;
import javax.jms.MessageListener;
import javax.jms.QueueConnection;
import javax.jms.QueueSession;
import javax.jms.QueueSender;
import javax.jms.QueueConnectionFactory;
import javax.jms.Queue;
import javax.jms.Message;
import javax.jms.TextMessage;
import javax.jms.JMSException;
import javax.naming.InitialContext;
import org.jboss.logging.Logger;
public class StrictlyPooledMDB implements MessageDrivenBean, MessageListener
{
private static Logger log = Logger.getLogger(StrictlyPooledMDB.class);
private static int maxActiveCount = 5;
private static int activeCount;
private MessageDrivenContext ctx = null;
private QueueConnection queConn;
private QueueSession session;
private QueueSender sender;
private static synchronized int incActiveCount()
{
return activeCount ++;
}
private static synchronized int decActiveCount()
{
return activeCount --;
}
public void setMessageDrivenContext(MessageDrivenContext ctx)
throws EJBException
{
this.ctx = ctx;
try
{
InitialContext iniCtx = new InitialContext();
Integer i = (Integer) iniCtx.lookup("java:comp/env/maxActiveCount");
maxActiveCount = i.intValue();
QueueConnectionFactory factory = (QueueConnectionFactory) iniCtx.lookup("java:/ConnectionFactory");
queConn = factory.createQueueConnection();
session = queConn.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE);
Queue queue = (Queue) iniCtx.lookup("queue/B");
sender = session.createSender(queue);
}
catch(Exception e)
{
log.error("Setup failure", e);
throw new EJBException("Setup failure", e);
}
}
public void ejbCreate()
{
}
public void ejbRemove()
{
try
{
if( sender != null )
sender.close();
if( session != null )
session.close();
if( queConn != null )
queConn.close();
}
catch(Exception e)
{
log.error("Failed to close JMS resources", e);
}
}
public void onMessage(Message message)
{
int count = incActiveCount();
log.debug("Begin onMessage, activeCount="+count+", ctx="+ctx);
try
{
Message reply = null;
if( count > maxActiveCount )
{
String msg = "IllegalState, activeCount > maxActiveCount, "
+ count + " > " + maxActiveCount;
Exception e = new IllegalStateException(msg);
reply = session.createObjectMessage(e);
}
else
{
TextMessage tm = (TextMessage) message;
reply = session.createTextMessage("Recevied msg="+tm.getText());
}
Thread.currentThread().sleep(1000);
sender.send(reply);
}
catch(JMSException e)
{
log.error("Failed to send error message", e);
}
catch(InterruptedException e)
{
}
finally
{
count = decActiveCount();
log.debug("End onMessage, activeCount="+count+", ctx="+ctx);
}
}
}