| /* |
| * 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 java.util.HashMap; |
| import java.util.Map; |
| |
| public class RpcServiceDispatcher implements RpcServiceEndpoint { |
| |
| private static Map<Class<?>, Map<String, Method>> s_handlerCache = new HashMap<Class<?>, Map<String, Method>>(); |
| |
| private static Map<Object, RpcServiceDispatcher> s_targetMap = new HashMap<Object, RpcServiceDispatcher>(); |
| private Object _targetObject; |
| |
| public RpcServiceDispatcher(Object targetObject) { |
| _targetObject = targetObject; |
| } |
| |
| public static RpcServiceDispatcher getDispatcher(Object targetObject) { |
| RpcServiceDispatcher dispatcher; |
| synchronized (s_targetMap) { |
| dispatcher = s_targetMap.get(targetObject); |
| if (dispatcher == null) { |
| dispatcher = new RpcServiceDispatcher(targetObject); |
| s_targetMap.put(targetObject, dispatcher); |
| } |
| } |
| return dispatcher; |
| } |
| |
| public static void removeDispatcher(Object targetObject) { |
| synchronized (s_targetMap) { |
| s_targetMap.remove(targetObject); |
| } |
| } |
| |
| public static boolean dispatch(Object target, RpcServerCall serviceCall) { |
| assert (serviceCall != null); |
| assert (target != null); |
| |
| Method handler = resolveHandler(target.getClass(), serviceCall.getCommand()); |
| if (handler == null) |
| return false; |
| |
| try { |
| handler.invoke(target, serviceCall); |
| } catch (IllegalArgumentException e) { |
| throw new RpcException("IllegalArgumentException when invoking RPC service command: " + serviceCall.getCommand()); |
| } catch (IllegalAccessException e) { |
| throw new RpcException("IllegalAccessException when invoking RPC service command: " + serviceCall.getCommand()); |
| } catch (InvocationTargetException e) { |
| throw new RpcException("InvocationTargetException when invoking RPC service command: " + serviceCall.getCommand()); |
| } |
| |
| return true; |
| } |
| |
| public static Method resolveHandler(Class<?> handlerClz, String command) { |
| synchronized (s_handlerCache) { |
| Map<String, Method> handlerMap = getAndSetHandlerMap(handlerClz); |
| |
| Method handler = handlerMap.get(command); |
| if (handler != null) |
| return handler; |
| |
| for (Method method : handlerClz.getDeclaredMethods()) { |
| RpcServiceHandler annotation = method.getAnnotation(RpcServiceHandler.class); |
| if (annotation != null) { |
| if (annotation.command().equals(command)) { |
| method.setAccessible(true); |
| handlerMap.put(command, method); |
| return method; |
| } |
| } |
| } |
| } |
| |
| return null; |
| } |
| |
| private static Map<String, Method> getAndSetHandlerMap(Class<?> handlerClz) { |
| Map<String, Method> handlerMap; |
| synchronized (s_handlerCache) { |
| handlerMap = s_handlerCache.get(handlerClz); |
| |
| if (handlerMap == null) { |
| handlerMap = new HashMap<String, Method>(); |
| s_handlerCache.put(handlerClz, handlerMap); |
| } |
| } |
| |
| return handlerMap; |
| } |
| |
| @Override |
| public boolean onCallReceive(RpcServerCall call) { |
| return dispatch(_targetObject, call); |
| } |
| } |