/*
* Copyright 2006 GigaSpaces, Inc.
*
* Licensed 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.springmodules.javaspaces.gigaspaces;
import java.io.Serializable;
import java.lang.reflect.Method;
import org.springframework.remoting.RemoteAccessException;
import org.springmodules.javaspaces.JavaSpaceInterceptor;
import org.springmodules.javaspaces.entry.AbstractMethodCallEntry;
import org.springmodules.javaspaces.entry.MethodResultEntry;
import org.springmodules.javaspaces.entry.RunnableMethodCallEntry;
import org.springmodules.javaspaces.entry.ServiceSeekingMethodCallEntry;
import org.springmodules.javaspaces.gigaspaces.remote.GigaSpacesMethodResultEntry;
import org.springmodules.javaspaces.gigaspaces.remote.GigaSpacesRunnableMethodCallEntry;
import org.springmodules.javaspaces.gigaspaces.remote.GigaSpacesServiceSeekingMethodCallEntry;
/**
* <p>
* Generic invoker for GigaSpaces -implemented methods. It allows method
* invocations on a given proxy interface to be transparently implemented as
* write/take operations of a generic entry to a JavaSpace. This is used as the
* terminal interceptor for a Spring AOP proxy. See the Spring implementation of
* local and remote EJB proxies, which illustrates the same concepts.
* <p>
* This class supports two modes of GigaSpaces usage:
* <li>The endpoint hosts the service, and only the method to be invoked and
* arguments are passed around the network. This is somewhat like a SLSB
* approach to remoting, although there is no assumption as to where the
* endpoint is.
* <li>The endpoint does not necessarily host the service. The code to execute
* as well as the method and arguments are shipped to the node that takes from
* the space. This is a "runnable entry" approach. To enable this, simply set
* the serializableTarget property on this object to an object that can be
* serialized to implement the method. Typically this will be dependency
* injected with Spring, allowing the object to be configured. Make sure this
* object is serializable. Alternatively, override the serializableTarget()
* method to return a custom object.
*
* This interceptor is generic. One interceptor instance can serve multiple
* methods.
* </p>
* Copyright: Copyright 2006 GigaSpaces Technologies. All rights reserved.
* Company: Gigaspaces Technologies
* @author Lior Ben Yizhak
* @version 5.0
*/
public class GigaSpacesInterceptor extends JavaSpaceInterceptor {
/**
* Gets the ServiceSeekingMethodCallEntry
* @param method the method
* @param args the method agrs
* @return ServiceSeekingMethodCallEntry
*/
protected ServiceSeekingMethodCallEntry createServiceSeekingMethodCallEntry(Method method, Object[] args){
Serializable uid = null;
if(getUidFactory() != null){
uid = getUidFactory().generateUid();
}
GigaSpacesServiceSeekingMethodCallEntry serviceSeekingMethodCallEntry = new GigaSpacesServiceSeekingMethodCallEntry(method, args,uid);
return serviceSeekingMethodCallEntry;
}
/**
* Gets RunnableMethodCallEntry
* @param method the method
* @param args the method arg's
* @param target the target
* @return RunnableMethodCallEntry
*/
protected RunnableMethodCallEntry createRunnableMethodCallEntry(Method method, Object[] args, Object target){
Serializable uid = null;
if(getUidFactory() != null){
uid = getUidFactory().generateUid();
}
GigaSpacesRunnableMethodCallEntry runnableMethodCallEntry = new GigaSpacesRunnableMethodCallEntry(method, args, target, uid);
return runnableMethodCallEntry;
}
/**
* Create the specific method result entry
* @param call the call entry method
* @return the method result entry.
*/
protected MethodResultEntry createMethodResultEntry(AbstractMethodCallEntry call){
return new GigaSpacesMethodResultEntry((Method) null, call.uid, null);
}
}