| /* |
| * 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.dubbo.remoting.transport.dispatcher; |
| |
| import org.apache.dubbo.common.URL; |
| import org.apache.dubbo.common.logger.Logger; |
| import org.apache.dubbo.common.logger.LoggerFactory; |
| import org.apache.dubbo.common.resource.GlobalResourcesRepository; |
| import org.apache.dubbo.common.threadpool.manager.ExecutorRepository; |
| import org.apache.dubbo.remoting.Channel; |
| import org.apache.dubbo.remoting.ChannelHandler; |
| import org.apache.dubbo.remoting.RemotingException; |
| import org.apache.dubbo.remoting.exchange.Request; |
| import org.apache.dubbo.remoting.exchange.Response; |
| import org.apache.dubbo.remoting.exchange.support.DefaultFuture; |
| import org.apache.dubbo.remoting.transport.ChannelHandlerDelegate; |
| import org.apache.dubbo.rpc.model.ApplicationModel; |
| |
| import java.util.concurrent.ExecutorService; |
| |
| public class WrappedChannelHandler implements ChannelHandlerDelegate { |
| |
| protected static final Logger logger = LoggerFactory.getLogger(WrappedChannelHandler.class); |
| |
| protected final ChannelHandler handler; |
| |
| protected final URL url; |
| |
| public WrappedChannelHandler(ChannelHandler handler, URL url) { |
| this.handler = handler; |
| this.url = url; |
| } |
| |
| public void close() { |
| |
| } |
| |
| @Override |
| public void connected(Channel channel) throws RemotingException { |
| handler.connected(channel); |
| } |
| |
| @Override |
| public void disconnected(Channel channel) throws RemotingException { |
| handler.disconnected(channel); |
| } |
| |
| @Override |
| public void sent(Channel channel, Object message) throws RemotingException { |
| handler.sent(channel, message); |
| } |
| |
| @Override |
| public void received(Channel channel, Object message) throws RemotingException { |
| handler.received(channel, message); |
| } |
| |
| @Override |
| public void caught(Channel channel, Throwable exception) throws RemotingException { |
| handler.caught(channel, exception); |
| } |
| |
| protected void sendFeedback(Channel channel, Request request, Throwable t) throws RemotingException { |
| |
| if (!request.isTwoWay()) { |
| return; |
| } |
| |
| String msg = "Server side(" + url.getIp() + "," + url.getPort() |
| + ") thread pool is exhausted, detail msg:" + t.getMessage(); |
| |
| Response response = new Response(request.getId(), request.getVersion()); |
| response.setStatus(Response.SERVER_THREADPOOL_EXHAUSTED_ERROR); |
| response.setErrorMessage(msg); |
| |
| channel.send(response); |
| } |
| |
| @Override |
| public ChannelHandler getHandler() { |
| if (handler instanceof ChannelHandlerDelegate) { |
| return ((ChannelHandlerDelegate) handler).getHandler(); |
| } else { |
| return handler; |
| } |
| } |
| |
| public URL getUrl() { |
| return url; |
| } |
| |
| /** |
| * Currently, this method is mainly customized to facilitate the thread model on consumer side. |
| * 1. Use ThreadlessExecutor, aka., delegate callback directly to the thread initiating the call. |
| * 2. Use shared executor to execute the callback. |
| * |
| * @param msg |
| * @return |
| */ |
| public ExecutorService getPreferredExecutorService(Object msg) { |
| if (msg instanceof Response) { |
| Response response = (Response) msg; |
| DefaultFuture responseFuture = DefaultFuture.getFuture(response.getId()); |
| // a typical scenario is the response returned after timeout, the timeout response may have completed the future |
| if (responseFuture == null) { |
| return getSharedExecutorService(); |
| } else { |
| ExecutorService executor = responseFuture.getExecutor(); |
| if (executor == null || executor.isShutdown()) { |
| executor = getSharedExecutorService(); |
| } |
| return executor; |
| } |
| } else { |
| return getSharedExecutorService(); |
| } |
| } |
| |
| /** |
| * get the shared executor for current Server or Client |
| * |
| * @return |
| */ |
| public ExecutorService getSharedExecutorService() { |
| // Application may be destroyed before channel disconnected, avoid create new application model |
| // see https://github.com/apache/dubbo/issues/9127 |
| if (url.getApplicationModel() == null || url.getApplicationModel().isDestroyed()) { |
| return GlobalResourcesRepository.getGlobalExecutorService(); |
| } |
| |
| // note: url.getOrDefaultApplicationModel() may create new application model |
| ApplicationModel applicationModel = url.getOrDefaultApplicationModel(); |
| |
| ExecutorRepository executorRepository = |
| applicationModel.getExtensionLoader(ExecutorRepository.class).getDefaultExtension(); |
| |
| ExecutorService executor = executorRepository.getExecutor(url); |
| |
| if (executor == null) { |
| executor = executorRepository.createExecutorIfAbsent(url); |
| } |
| |
| return executor; |
| } |
| |
| @Deprecated |
| public ExecutorService getExecutorService() { |
| return getSharedExecutorService(); |
| } |
| |
| } |