com.alibaba.dubbo.remoting.transport.dispatcher.connection.ConnectionOrderedChannelHandler Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of dubbo2 Show documentation
The all in one project of dubbo2
The newest version!
/*
 * Copyright 1999-2011 Alibaba Group.
 *  
 * 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 com.alibaba.dubbo.remoting.transport.dispatcher.connection;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

import com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.URL;
import com.alibaba.dubbo.common.threadpool.support.AbortPolicyWithReport;
import com.alibaba.dubbo.common.utils.NamedThreadFactory;
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.transport.dispatcher.ChannelEventRunnable;
import com.alibaba.dubbo.remoting.transport.dispatcher.WrappedChannelHandler;
import com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.ChannelState;

public class ConnectionOrderedChannelHandler extends WrappedChannelHandler {

    protected final ThreadPoolExecutor connectionExecutor;
    private final int queuewarninglimit ;
    
    public ConnectionOrderedChannelHandler(ChannelHandler handler, URL url) {
        super(handler, url);
        String threadName = url.getParameter(Constants.THREAD_NAME_KEY,Constants.DEFAULT_THREAD_NAME);
        connectionExecutor = new ThreadPoolExecutor(1, 1,
                                     0L, TimeUnit.MILLISECONDS,
                                     new LinkedBlockingQueue(url.getPositiveParameter(Constants.CONNECT_QUEUE_CAPACITY, Integer.MAX_VALUE)),
                                     new NamedThreadFactory(threadName, true),
                                     new AbortPolicyWithReport(threadName, url)
            );  // FIXME 没有地方释放connectionExecutor！
        queuewarninglimit = url.getParameter(Constants.CONNECT_QUEUE_WARNING_SIZE, Constants.DEFAULT_CONNECT_QUEUE_WARNING_SIZE);
    }

    public void connected(Channel channel) throws RemotingException {
        try{
            checkQueueLength();
            connectionExecutor.execute(new ChannelEventRunnable(channel, handler ,ChannelState.CONNECTED));
        }catch (Throwable t) {
            throw new ExecutionException("connect event", channel, getClass()+" error when process connected event ." , t);
        }
    }

    public void disconnected(Channel channel) throws RemotingException {
        try{
            checkQueueLength();
            connectionExecutor.execute(new ChannelEventRunnable(channel, handler ,ChannelState.DISCONNECTED));
        }catch (Throwable t) {
            throw new ExecutionException("disconnected event", channel, getClass()+" error when process disconnected event ." , t);
        }
    }

    public void received(Channel channel, Object message) throws RemotingException {
        ExecutorService cexecutor = executor;
        if (cexecutor == null || cexecutor.isShutdown()) {
            cexecutor = SHARED_EXECUTOR;
        }
        try {
            cexecutor.execute(new ChannelEventRunnable(channel, handler, ChannelState.RECEIVED, message));
        } catch (Throwable t) {
            throw new ExecutionException(message, channel, getClass() + " error when process received event .", t);
        }
    }

    public void caught(Channel channel, Throwable exception) throws RemotingException {
        ExecutorService cexecutor = executor;
        if (cexecutor == null || cexecutor.isShutdown()) { 
            cexecutor = SHARED_EXECUTOR;
        } 
        try{
            cexecutor.execute(new ChannelEventRunnable(channel, handler ,ChannelState.CAUGHT, exception));
        }catch (Throwable t) {
            throw new ExecutionException("caught event", channel, getClass()+" error when process caught event ." , t);
        }
    }
    
    private void checkQueueLength(){
        if (connectionExecutor.getQueue().size() > queuewarninglimit){
            logger.warn(new IllegalThreadStateException("connectionordered channel handler `queue size: "+connectionExecutor.getQueue().size()+" exceed the warning limit number :"+queuewarninglimit));
        }
    }
}