/*
* 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.ejb3.remote;
import org.jboss.as.ejb3.EjbMessages;
import org.jboss.ejb.client.ContextSelector;
import org.jboss.ejb.client.EJBClientContext;
import org.jboss.ejb.client.EJBClientContextIdentifier;
import org.jboss.ejb.client.IdentityEJBClientContextSelector;
import org.jboss.ejb.client.Logs;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.ServiceName;
import org.jboss.msc.service.StartContext;
import org.jboss.msc.service.StartException;
import org.jboss.msc.service.StopContext;
import java.util.WeakHashMap;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
* A EJB client context selector which returns a {@link EJBClientContext} based on the thread context classloader
* that's present when the {@link #getCurrent()} is invoked. This {@link TCCLEJBClientContextSelectorService} is also
* capable of managing {@link EJBClientContext}s identifiable by {@link EJBClientContextIdentifier}s
*
* @author Jaikiran Pai
*/
public class TCCLEJBClientContextSelectorService implements Service<TCCLEJBClientContextSelectorService>,
ContextSelector<EJBClientContext>, IdentityEJBClientContextSelector {
public static final ServiceName TCCL_BASED_EJB_CLIENT_CONTEXT_SELECTOR_SERVICE_NAME = ServiceName.JBOSS.append("ejb").append("remote").append("tccl-based-ejb-client-context-selector");
/**
* EJB client contexts mapped against the classloader
*/
private final WeakHashMap<ClassLoader, EJBClientContext> ejbClientContexts = new WeakHashMap<ClassLoader, EJBClientContext>();
private final ConcurrentMap<EJBClientContextIdentifier, EJBClientContext> identifiableContexts = new ConcurrentHashMap<EJBClientContextIdentifier, org.jboss.ejb.client.EJBClientContext>();
@Override
public EJBClientContext getCurrent() {
final ClassLoader tccl = SecurityActions.getContextClassLoader();
// TODO: Do we fall back on some other CL?
if (tccl == null) {
throw EjbMessages.MESSAGES.tcclNotAvailable();
}
synchronized (this.ejbClientContexts) {
return this.ejbClientContexts.get(tccl);
}
}
@Override
public void start(StartContext context) throws StartException {
}
@Override
public void stop(StopContext context) {
// clear the contexts
synchronized (this.ejbClientContexts) {
this.ejbClientContexts.clear();
}
this.identifiableContexts.clear();
}
@Override
public TCCLEJBClientContextSelectorService getValue() throws IllegalStateException, IllegalArgumentException {
return this;
}
/**
* Associates a {@link EJBClientContext} with the passed <code>classLoader</code>.
*
* @param ejbClientContext The EJB client context
* @param classLoader The classloader with which the EJB client context has to be associated
*/
public void registerEJBClientContext(final EJBClientContext ejbClientContext, final ClassLoader classLoader) {
synchronized (this.ejbClientContexts) {
this.ejbClientContexts.put(classLoader, ejbClientContext);
}
}
@Override
public void registerContext(final EJBClientContextIdentifier identifier, final EJBClientContext context) {
final EJBClientContext previousRegisteredContext = this.identifiableContexts.putIfAbsent(identifier, context);
if (previousRegisteredContext != null) {
throw Logs.MAIN.ejbClientContextAlreadyRegisteredForIdentifier(identifier);
}
}
@Override
public EJBClientContext unRegisterContext(final EJBClientContextIdentifier identifier) {
return this.identifiableContexts.remove(identifier);
}
@Override
public EJBClientContext getContext(final EJBClientContextIdentifier identifier) {
return this.identifiableContexts.get(identifier);
}
}