/*
* JBoss, Home of Professional Open Source.
* Copyright 2012, 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.logging.Logger;
/**
* A {@link DefaultEJBClientContextSelector} is backed by {@link TCCLEJBClientContextSelectorService}
* @author Jaikiran Pai
*/
class DefaultEJBClientContextSelector implements ContextSelector<EJBClientContext>, IdentityEJBClientContextSelector {
private static final Logger logger = Logger.getLogger(DefaultEJBClientContextSelector.class);
static final DefaultEJBClientContextSelector INSTANCE = new DefaultEJBClientContextSelector();
private volatile TCCLEJBClientContextSelectorService tcclEJBClientContextService;
private volatile EJBClientContext defaultEJBClientContext;
/**
* Sets the TCCL based client context service, which will be used to query for EJB client context, and the
* default EJB client context which will be used when there's no EJB client context associated with the
* thread context classloader when {@link #getCurrent()} is invoked.
*
* @param clientContextService The {@link TCCLEJBClientContextSelectorService}
* @param defaultEJBClientContext The default EJB client context to fallback on when the {@link org.jboss.as.ejb3.remote.TCCLEJBClientContextSelectorService#getCurrent()}
* returns null
*/
void setup(final TCCLEJBClientContextSelectorService clientContextService, final EJBClientContext defaultEJBClientContext) {
this.tcclEJBClientContextService = clientContextService;
this.defaultEJBClientContext = defaultEJBClientContext;
}
/**
* Cleans up any reference to a the TCCL based context service and the default EJB client context
*/
void destroy() {
this.tcclEJBClientContextService = null;
this.defaultEJBClientContext = null;
}
@Override
public EJBClientContext getCurrent() {
if (this.tcclEJBClientContextService == null) {
return null;
}
final EJBClientContext ejbClientContext = this.tcclEJBClientContextService.getCurrent();
if (ejbClientContext != null) {
return ejbClientContext;
}
// explicit isDebugEnabled() check to ensure that the SecurityActions.getContextClassLoader() isn't
// unnecessarily executed when debug logging is disabled
if (logger.isDebugEnabled()) {
logger.debug("Returning default EJB client context " + this.defaultEJBClientContext + " since no EJB client context could be found for TCCL " + SecurityActions.getContextClassLoader());
}
return this.defaultEJBClientContext;
}
@Override
public void registerContext(final EJBClientContextIdentifier identifier, final EJBClientContext context) {
if (this.tcclEJBClientContextService == null) {
throw EjbMessages.MESSAGES.ejbClientContextSelectorUnableToFunctionDueToMissingService(TCCLEJBClientContextSelectorService.TCCL_BASED_EJB_CLIENT_CONTEXT_SELECTOR_SERVICE_NAME);
}
this.tcclEJBClientContextService.registerContext(identifier, context);
}
@Override
public EJBClientContext unRegisterContext(final EJBClientContextIdentifier identifier) {
if (this.tcclEJBClientContextService == null) {
throw EjbMessages.MESSAGES.ejbClientContextSelectorUnableToFunctionDueToMissingService(TCCLEJBClientContextSelectorService.TCCL_BASED_EJB_CLIENT_CONTEXT_SELECTOR_SERVICE_NAME);
}
return this.tcclEJBClientContextService.unRegisterContext(identifier);
}
@Override
public EJBClientContext getContext(final EJBClientContextIdentifier identifier) {
if (this.tcclEJBClientContextService == null) {
throw EjbMessages.MESSAGES.ejbClientContextSelectorUnableToFunctionDueToMissingService(TCCLEJBClientContextSelectorService.TCCL_BASED_EJB_CLIENT_CONTEXT_SELECTOR_SERVICE_NAME);
}
return this.tcclEJBClientContextService.getContext(identifier);
}
}