| /* |
| * 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 com.alibaba.dubbo.remoting.transport.dispatcher.execution; |
| |
| import com.alibaba.dubbo.common.URL; |
| import com.alibaba.dubbo.remoting.Channel; |
| import com.alibaba.dubbo.remoting.ChannelHandler; |
| import com.alibaba.dubbo.remoting.ExecutionException; |
| import com.alibaba.dubbo.remoting.RemotingException; |
| import com.alibaba.dubbo.remoting.exchange.Request; |
| import com.alibaba.dubbo.remoting.exchange.Response; |
| import com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable; |
| import com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.ChannelState; |
| import com.alibaba.dubbo.remoting.transport.dispatcher.WrappedChannelHandler; |
| |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.RejectedExecutionException; |
| |
| /** |
| * Only request message will be dispatched to thread pool. Other messages like response, connect, disconnect, |
| * heartbeat will be directly executed by I/O thread. |
| */ |
| public class ExecutionChannelHandler extends WrappedChannelHandler { |
| |
| public ExecutionChannelHandler(ChannelHandler handler, URL url) { |
| super(handler, url); |
| } |
| |
| @Override |
| public void received(Channel channel, Object message) throws RemotingException { |
| ExecutorService cexecutor = getExecutorService(); |
| if (message instanceof Request) { |
| try { |
| cexecutor.execute(new ChannelEventRunnable(channel, handler, ChannelState.RECEIVED, message)); |
| } catch (Throwable t) { |
| // FIXME: when the thread pool is full, SERVER_THREADPOOL_EXHAUSTED_ERROR cannot return properly, |
| // therefore the consumer side has to wait until gets timeout. This is a temporary solution to prevent |
| // this scenario from happening, but a better solution should be considered later. |
| if (t instanceof RejectedExecutionException) { |
| Request request = (Request) message; |
| if (request.isTwoWay()) { |
| 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); |
| return; |
| } |
| } |
| throw new ExecutionException(message, channel, getClass() + " error when process received event.", t); |
| } |
| } else { |
| handler.received(channel, message); |
| } |
| } |
| } |