/*
* 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.cloudstack.framework.rpc;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;
public class RpcCallbackDispatcher<T> {
private Method _callbackMethod;
private T _targetObject;
private RpcCallbackDispatcher(T target) {
_targetObject = target;
}
@SuppressWarnings("unchecked")
public T getTarget() {
return (T)Enhancer.create(_targetObject.getClass(), new MethodInterceptor() {
@Override
public Object intercept(Object arg0, Method arg1, Object[] arg2, MethodProxy arg3) throws Throwable {
_callbackMethod = arg1;
return null;
}
});
}
public RpcCallbackDispatcher<T> setCallback(Object useless) {
return this;
}
public static <P> RpcCallbackDispatcher<P> create(P target) {
return new RpcCallbackDispatcher<P>(target);
}
public boolean dispatch(RpcClientCall clientCall) {
assert (clientCall != null);
if (_callbackMethod == null)
return false;
try {
_callbackMethod.invoke(_targetObject, clientCall, clientCall.getContext());
} catch (IllegalArgumentException e) {
throw new RpcException("IllegalArgumentException when invoking RPC callback for command: " + clientCall.getCommand());
} catch (IllegalAccessException e) {
throw new RpcException("IllegalAccessException when invoking RPC callback for command: " + clientCall.getCommand());
} catch (InvocationTargetException e) {
throw new RpcException("InvocationTargetException when invoking RPC callback for command: " + clientCall.getCommand());
}
return true;
}
}