/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.config.gen;
import javax.ejb.AccessTimeout;
import javax.ejb.ConcurrencyManagement;
import javax.ejb.ConcurrencyManagementType;
import javax.ejb.Lock;
import javax.ejb.LockType;
import javax.enterprise.inject.spi.AnnotatedMethod;
import javax.enterprise.inject.spi.AnnotatedType;
import com.caucho.inject.Module;
/**
* Aspect factory for generating @Lock aspects.
*/
@Module
public class LockFactory<X> extends AbstractAspectFactory<X> {
private ConcurrencyManagementType _concurrencyManagement
= ConcurrencyManagementType.CONTAINER;
private LockType _classLockType;
private AccessTimeout _classAccessTimeout;
public LockFactory(AspectBeanFactory<X> beanFactory, AspectFactory<X> next) {
super(beanFactory, next);
AnnotatedType<X> beanType = beanFactory.getBeanType();
ConcurrencyManagement concurrencyManagement = beanType
.getAnnotation(ConcurrencyManagement.class);
if (concurrencyManagement != null) {
_concurrencyManagement = concurrencyManagement.value();
}
Lock lock = beanType.getAnnotation(Lock.class);
if (lock != null) {
_classLockType = lock.value();
}
_classAccessTimeout = beanType.getAnnotation(AccessTimeout.class);
}
/**
* Creates an aspect for interception if the method should be intercepted.
*/
@Override
@SuppressWarnings({ "unchecked", "rawtypes" })
public AspectGenerator<X> create(AnnotatedMethod<? super X> method,
boolean isEnhanced)
{
// TODO The annotation resolution algorithm should probably be re-factored
// in a superclass.
AnnotatedType<?> declaringType = method.getDeclaringType();
LockType lockType = null;
Lock methodLevelLock = method.getAnnotation(Lock.class);
Lock declaringClassLock = (declaringType != null) ? declaringType
.getAnnotation(Lock.class) : null;
// The method-level annotation takes precedence.
if (methodLevelLock != null) {
lockType = methodLevelLock.value();
}
// Then the class-level annotation at the declaring class takes precedence.
else if (declaringClassLock != null) {
lockType = declaringClassLock.value();
}
// Finally, the top level class annotation takes effect.
else {
lockType = _classLockType;
}
AccessTimeout accessTimeout = null;
AccessTimeout methodLevelAccessTimeout = method
.getAnnotation(AccessTimeout.class);
AccessTimeout declaringClassAccessTimeout = (declaringType != null) ? declaringType
.getAnnotation(AccessTimeout.class)
: null;
// The method-level annotation takes precedence.
if (methodLevelAccessTimeout != null) {
accessTimeout = methodLevelAccessTimeout;
}
// Then the class-level annotation at the declaring class takes precedence.
else if (declaringClassAccessTimeout != null) {
accessTimeout = declaringClassAccessTimeout;
}
// Finally, the top level class annotation takes effect.
else {
accessTimeout = _classAccessTimeout;
}
if ((lockType == null)
|| (_concurrencyManagement == ConcurrencyManagementType.BEAN))
return super.create(method, isEnhanced);
else {
AspectGenerator<X> next = super.create(method, true);
if (accessTimeout != null) {
return new LockGenerator(this, method, next, lockType, accessTimeout
.value(), accessTimeout.unit());
} else {
return new LockGenerator(this, method, next, lockType, -1, null);
}
}
}
}