/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.webbeans.proxy;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.Serializable;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import javassist.util.proxy.MethodHandler;
import org.apache.webbeans.component.ResourceBean;
import org.apache.webbeans.config.WebBeansContext;
import org.apache.webbeans.spi.ResourceInjectionService;
public class ResourceProxyHandler implements MethodHandler, Serializable, Externalizable
{
/**
*
*/
private static final long serialVersionUID = 2608686651845218158L;
private transient Object actualResource;
private transient ResourceBean bean;
public ResourceProxyHandler()
{
//DO NOT REMOVE, used by failover and passivation.
}
public ResourceProxyHandler(ResourceBean bean, Object actualResource)
{
this.bean = bean;
this.actualResource = actualResource;
}
public Object invoke(Object self, Method actualMethod, Method proceed, Object[] args) throws Throwable
{
try
{
return actualMethod.invoke(actualResource, args);
}
catch (InvocationTargetException e)
{
throw e.getTargetException();
}
}
/**
* When serialized, first try container provided failover service. If the failover service
* does not handle the actual instance, the default behavior is:
* 1. If actual object is serializable, then serialize it directly.
* 2. If not, serialize the DUMMY_STRING.
*/
public void writeExternal(ObjectOutput out) throws IOException
{
// write bean id first
out.writeObject(bean.getId());
WebBeansContext webBeansContext = WebBeansContext.getInstance();
ResourceInjectionService resourceInjectionService = webBeansContext.getService(ResourceInjectionService.class);
resourceInjectionService.writeExternal(bean, actualResource, out);
}
/**
* When deserialized, first try container provided failover service. If the failover service does not
* handle the actual instance, the default behavior is:
* 1. Read the object from the stream,
* 2. If the object is renote ejb stub, reconnect it.
* 3. if the object is DUMMY_STRING, invoke ResourceBean.getActualInstance to get a new instance of the resource.
*/
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException
{
String id = (String)in.readObject();
WebBeansContext webBeansContext = WebBeansContext.currentInstance();
bean = (ResourceBean) webBeansContext.getBeanManagerImpl().getPassivationCapableBean(id);
ResourceInjectionService resourceInjectionService = webBeansContext.getService(ResourceInjectionService.class);
actualResource = resourceInjectionService.readExternal(bean, in);
}
}