/*
* JBoss, Home of Professional Open Source.
* Copyright 2009, Red Hat Middleware LLC, 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.ejb3.concurrency.aop.interceptor;
import javax.ejb.ConcurrencyManagement;
import javax.ejb.ConcurrencyManagementType;
import org.jboss.aop.Advisor;
import org.jboss.aop.InstanceAdvisor;
import org.jboss.aop.advice.InterceptorFactory;
import org.jboss.ejb3.interceptors.aop.AbstractInterceptorFactory;
/**
* Responsible for creating an AOP based interceptor ({@link ContainerManagedConcurrencyInterceptor})
* if the bean for which this {@link InterceptorFactory} is configured requires container managed
* concurrency.
*
* @author <a href="mailto:cdewolf@redhat.com">Carlo de Wolf</a>
* @version $Revision: $
*/
public class ContainerManagedConcurrencyInterceptorFactory extends AbstractInterceptorFactory
{
/*
* By default a singleton container must have container managed concurrency, this can be setup
* within aop.xml instead of forcing it through an interceptor factory.
*/
/**
* Returns a {@link ContainerManagedConcurrencyInterceptor} if the advisor is for a bean
* which requires container managed concurrency. Else returns null
*/
@Override
public Object createPerInstance(Advisor advisor, InstanceAdvisor instanceAdvisor)
{
if(!isContainerManagedConcurrency(advisor))
return null;
return new ContainerManagedConcurrencyInterceptor();
}
/**
* Returns true if the bean corresponding to the passed <code>advisor</code> requires
* container managed concurrency. Else returns false.
*
* @param advisor
* @return
*/
private boolean isContainerManagedConcurrency(Advisor advisor)
{
ConcurrencyManagement cm = (ConcurrencyManagement) advisor.resolveAnnotation(ConcurrencyManagement.class);
// 4.8.5.3 By default, a singleton bean has container managed concurrency demarcation if the concurrency management type is not specified.
if(cm == null)
return true;
return cm.value() == ConcurrencyManagementType.CONTAINER;
}
}