Hi! Looks like org.jboss.ejb.plugins.SingletonStatelessSessionInstancePool in JBoss 4.0.1 wasn't updated for a while, at it doesn't work properly. Below I give the fixed version, as far as I can guess how it should be fixed.
Regards, Oleg ----------------------------------------------------------------------------------- /* * JBoss, the OpenSource J2EE webOS * * Distributable under LGPL license. * See terms of license at gnu.org. */ package org.jboss.ejb.plugins; import java.rmi.RemoteException; import java.util.Map; import java.util.HashMap; import javax.ejb.EJBException; import org.jboss.deployment.DeploymentException; import org.jboss.ejb.Container; import org.jboss.ejb.InstancePool; import org.jboss.ejb.EnterpriseContext; import org.jboss.ejb.StatelessSessionEnterpriseContext; import org.jboss.metadata.XmlLoadable; import org.jboss.metadata.MetaData; import org.w3c.dom.Element; /** * Singleton pool for session beans. This lets you have * singletons in EJB! * * @see * @author <a href="mailto:[EMAIL PROTECTED]">Rickard Oberg</a> * @version $Revision: 1.23 $ */ public class SingletonStatelessSessionInstancePool extends AbstractInstancePool { // Constants ----------------------------------------------------- // Attributes ---------------------------------------------------- EnterpriseContext ctx; boolean inUse = false; boolean isSynchronized = true; // Static -------------------------------------------------------- // Constructors -------------------------------------------------- // Public -------------------------------------------------------- public void create() throws Exception { } public void start() throws Exception { } public void stop() { } public void destroy() { } /** * Get the singleton instance * * @return Context /w instance * @exception Exception */ public synchronized EnterpriseContext get() throws Exception { // Wait while someone else is using it while(inUse && isSynchronized) { try { this.wait(); } catch (InterruptedException e) {} } // Create if not already created (or it has been discarded) if (ctx == null) { try { ctx = create(getContainer().createBeanClassInstance()); } catch (InstantiationException e) { throw new EJBException("Could not instantiate bean", e); } catch (IllegalAccessException e) { throw new EJBException("Could not instantiate bean", e); } } else { } // Lock and return instance inUse = true; return ctx; } /** * Return an instance after invocation. * * Called in 2 cases: * a) Done with finder method * b) Just removed * * @param ctx */ public synchronized void free(EnterpriseContext ctx) { // Notify waiters inUse = false; this.notifyAll(); } public synchronized void discard(EnterpriseContext ctx) { // Throw away try { ctx.discard(); } catch (RemoteException e) { // DEBUG Logger.exception(e); } // Notify waiters inUse = false; this.notifyAll(); } /** * Add a instance in the pool */ public void add() throws Exception { // Empty } public int getCurrentSize() { return 1; } public int getMaxSize() { return 1; } // Z implementation ---------------------------------------------- // XmlLoadable implementation public void importXml(Element element) throws DeploymentException { Element synch = MetaData.getUniqueChild(element, "Synchronized"); isSynchronized = Boolean.valueOf(MetaData.getElementContent(synch)).booleanValue(); } // Package protected --------------------------------------------- // Protected ----------------------------------------------------- protected EnterpriseContext create(Object instance) throws Exception { // The instance is created by the caller and is a newInstance(); return new StatelessSessionEnterpriseContext(instance, getContainer()); } // Private ------------------------------------------------------- // Inner classes ------------------------------------------------- } View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3869390#3869390 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3869390 ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ JBoss-Development mailing list JBoss-Development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-development
