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/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss 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.aop.microcontainer.beans;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.Map;
import org.jboss.aop.AspectManager;
import org.jboss.aop.advice.AspectDefinition;
import org.jboss.aop.advice.AspectFactory;
import org.jboss.aop.advice.Scope;
import org.jboss.aop.advice.ScopeUtil;
import org.jboss.aop.instrument.Untransformable;
import org.jboss.beans.metadata.plugins.factory.GenericBeanFactory;
import org.jboss.kernel.spi.dependency.KernelControllerContext;
import org.jboss.kernel.spi.dependency.KernelControllerContextAware;
import org.jboss.logging.Logger;
import org.w3c.dom.Element;
/**
* An Aspect.
* This installs the AspectDefinition and AspectFactory into aop
*
* @author Adrian Brock
* @version $Revision: 82279 $
*/
public class Aspect implements Untransformable, KernelControllerContextAware
{
private static final Logger log = Logger.getLogger(Aspect.class);
/**
* The AspectManager/Domain we are creating this aspect for
*/
protected AspectManager manager;
/**
* True if aspect is an aspect factory, rather than the aspect itself
*/
protected boolean factory;
/**
* The scope of the aspect we are creating
*/
protected Scope scope;
protected ManagedAspectDefinition definition;
/**
* The beanfactory representing the advice. This should be used if the advice has no dependencies,
* in which case we have a real dependency on the beanfactory. If the advice has dependencies we need
* to use adviceBean instead;
*/
protected GenericBeanFactory advice;
/**
* The name of the beanfactory representing the advice. This should be used if the advice has dependencies,
* in which case we have no real dependency on the beanfactory. If the advice has no dependencies we need
* to use advice instead;
*/
protected String adviceBean;
/**
* The name of the aspect definition. This should be the same as the raw form of this bean's name
* (when run in AS, the name is massaged to avoid name clashes)
*/
protected String name;
/**
* All the AspectBindings referencing this Aspect
*/
protected Map bindings = new LinkedHashMap();
/**
* The element representing the interceptor in case we need to load xml
*/
private Element element;
/**
* The KernelControllerContext
*/
private KernelControllerContext context;
/**
* Get the name.
*
* @return the adviceName.
*/
public String getName()
{
return name;
}
/**
* Sets if we are an aspect factory or not
*
* @param factory true if we are a factory
*/
public void setFactory(boolean factory)
{
this.factory = factory;
}
/**
* Set the name.
*
* @param name The name to set.
*/
public void setName(String name)
{
this.name = name;
}
/**
* Get the adviceBean.
*
* @return the adviceBean.
*/
public String getAdviceBean()
{
return adviceBean;
}
/**
* Set the adviceBean.
*
* @param adviceBean the adviceBean.
*/
public void setAdviceBean(String adviceBean)
{
this.adviceBean = adviceBean;
}
/**
* Get the definition.
*
* @return the definition.
*/
public AspectDefinition getDefinition()
{
return definition;
}
/**
* Get the manager.
*
* @return the manager.
*/
public AspectManager getManager()
{
return manager;
}
/**
* Set the manager.
*
* @param manager The manager to set.
*/
public void setManager(AspectManager manager)
{
this.manager = manager;
}
/**
* Get the advice.
*
* @return the advice.
*/
public GenericBeanFactory getAdvice()
{
return advice;
}
/**
* Set the advice.
*
* @param advice The advice to set.
*/
public void setAdvice(GenericBeanFactory advice)
{
this.advice = advice;
}
/**
* Get the scope.
*
* @return the scope.
*/
public String getScope()
{
return scope.toString();
}
/**
* Set the scope.
*
* @param scope The scope to set.
*/
public void setScope(String scope)
{
this.scope = ScopeUtil.parse(scope);
}
public void setElement(Element element)
{
this.element = element;
}
public void install(GenericBeanFactory factory) throws Exception
{
this.advice = factory;
start();
}
public void start() throws Exception
{
if (definition == null)
{
if (manager == null)
throw new IllegalArgumentException("Null manager");
if (name == null)
throw new IllegalArgumentException("Null name");
if (advice != null)
{
definition = getAspectDefinitionNoDependencies();
}
else if (adviceBean != null)
{
definition = getAspectDefintionDependencies();
}
else
{
throw new IllegalStateException("Unknown type of managed aspects");
}
addDefinitionToManager();
}
if (adviceBean != null && advice != null)
{
definition.setDeployed(true);
BeanFactoryAwareAspectFactory factory = (BeanFactoryAwareAspectFactory)definition.getFactory();
factory.setBeanFactory(advice);
}
setDefinitionControllerContext(context);
//Copy the aspectbindings to avoid ConcurrentModificationExceptions
ArrayList clonedBindings = new ArrayList();
for (Binding aspectBinding : bindings.values())
{
clonedBindings.add(aspectBinding);
}
for (Binding binding : clonedBindings)
{
binding.rebind();
}
log.debug("Bound aspect " + name + "; deployed:" + definition.isDeployed());
}
protected ManagedAspectDefinition getAspectDefinitionNoDependencies()
{
AspectFactory factory = this.factory ?
new DelegatingBeanAspectFactory(name, advice, element) : new GenericBeanAspectFactory(name, advice, element);
return new ManagedAspectDefinition(name, scope, factory);
}
protected ManagedAspectDefinition getAspectDefintionDependencies()
{
AspectFactory factory = this.factory ?
new DelegatingBeanAspectFactory(name, advice, element) : new GenericBeanAspectFactory(name, advice, element);
return new ManagedAspectDefinition(name, scope, factory, adviceBean, false);
}
protected void addDefinitionToManager()
{
manager.addAspectDefinition(definition);
}
public void uninstall() throws Exception
{
stop();
}
public void stop()
{
log.debug("Unbinding aspect " + name);
manager.removeAspectDefinition(name);
if (definition != null)
{
setDefinitionControllerContext(null);
definition.undeploy();
definition = null;
}
}
void addBinding(Binding binding)
{
bindings.put(binding.getName(), binding);
}
void removeBinding(Binding binding)
{
bindings.remove(binding.getName());
}
public void setKernelControllerContext(KernelControllerContext context) throws Exception
{
this.context = context;
}
public void unsetKernelControllerContext(KernelControllerContext context) throws Exception
{
this.context = null;
}
protected void setDefinitionControllerContext(KernelControllerContext context)
{
try
{
if (definition != null)
{
((KernelControllerContextAware)definition.getFactory()).setKernelControllerContext(context);
}
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
}
