/*
* JBoss, Home of Professional Open Source
* Copyright 2010, Red Hat 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.as.ejb3.remote;
import org.jboss.ejb.client.ContextSelector;
import org.jboss.ejb.client.EJBClientContext;
import org.jboss.logging.Logger;
import org.jboss.msc.inject.Injector;
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 org.jboss.msc.value.InjectedValue;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* Service that manages an EJBClientContext
*
* @author Stuart Douglas
*/
public class DefaultEjbClientContextService implements Service<EJBClientContext> {
private static final Logger logger = Logger.getLogger(DefaultEjbClientContextService.class);
/**
* The base service name for these services
*/
public static final ServiceName BASE_SERVICE_NAME = ServiceName.JBOSS.append("ejb3", "ejbClientContext");
/**
* The default service name. There will always be a service registered under this name
*/
public static final ServiceName DEFAULT_SERVICE_NAME = BASE_SERVICE_NAME.append("default");
// setup the EJB client context selector in a static block so that the service restart
// doesn't run into trouble while resetting a selector, since the ability to switch the
// selector will be locked https://issues.jboss.org/browse/AS7-2998
static {
// setup the selector
AccessController.doPrivileged(new SetSelectorAction(TCCLEJBClientContextSelector.INSTANCE));
}
private final InjectedValue<TCCLEJBClientContextSelectorService> tcclEJBClientContextSelector = new InjectedValue<TCCLEJBClientContextSelectorService>();
private final InjectedValue<LocalEjbReceiver> defaultLocalEJBReceiver = new InjectedValue<LocalEjbReceiver>();
/**
* The client context
*/
private volatile EJBClientContext context;
private final boolean lockSelectorOnStart;
/**
* @param lockEJBClientContextSelectorOnStart
* True if the EJB client context selector should be locked on start of this
* service. False otherwise.
*/
public DefaultEjbClientContextService(final boolean lockEJBClientContextSelectorOnStart) {
this.lockSelectorOnStart = lockEJBClientContextSelectorOnStart;
}
@Override
public synchronized void start(final StartContext context) throws StartException {
final EJBClientContext clientContext = EJBClientContext.create();
// register the default local EJB receiver (if present - app clients don't have local EJB receivers)
final LocalEjbReceiver localEjbReceiver = this.defaultLocalEJBReceiver.getOptionalValue();
if (localEjbReceiver != null) {
clientContext.registerEJBReceiver(localEjbReceiver);
}
this.context = clientContext;
if (this.lockSelectorOnStart) {
// lock the EJB client context selector
AccessController.doPrivileged(new LockSelectorAction());
}
// the EJBClientContext selector is set to TCCLEJBClientContextSelector and is *locked* once
// (in a static block of this service) so that restarting this service will not cause failures related
// to resetting the selector. The TCCLEJBClientContextSelector is backed by a TCCLEJBClientContextSelectorService
// which is what we set here during the service start, so that the selector has the correct service to return the
// EJBClientContext. @see https://issues.jboss.org/browse/AS7-2998 for details
TCCLEJBClientContextSelector.INSTANCE.setup(this.tcclEJBClientContextSelector.getValue(), this.context);
}
@Override
public synchronized void stop(final StopContext context) {
this.context = null;
TCCLEJBClientContextSelector.INSTANCE.destroy();
}
@Override
public EJBClientContext getValue() throws IllegalStateException, IllegalArgumentException {
return context;
}
public Injector<TCCLEJBClientContextSelectorService> getTCCLBasedEJBClientContextSelectorInjector() {
return this.tcclEJBClientContextSelector;
}
public Injector<LocalEjbReceiver> getDefaultLocalEJBReceiverInjector() {
return this.defaultLocalEJBReceiver;
}
private static final class SetSelectorAction implements PrivilegedAction<ContextSelector<EJBClientContext>> {
private final ContextSelector<EJBClientContext> selector;
private SetSelectorAction(final ContextSelector<EJBClientContext> selector) {
this.selector = selector;
}
@Override
public ContextSelector<EJBClientContext> run() {
return EJBClientContext.setSelector(selector);
}
}
private static final class LockSelectorAction implements PrivilegedAction<Void> {
@Override
public Void run() {
EJBClientContext.lockSelector();
return null;
}
}
}