| /* |
| * |
| * 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.qpid.server.transport; |
| |
| import java.io.IOException; |
| import java.nio.channels.ServerSocketChannel; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.ThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.qpid.transport.TransportException; |
| |
| public class NetworkConnectionScheduler |
| { |
| private static final Logger LOGGER = LoggerFactory.getLogger(NetworkConnectionScheduler.class); |
| private final ThreadFactory _factory; |
| private final String _selectorThreadName; |
| private volatile ThreadPoolExecutor _executor; |
| private final AtomicInteger _running = new AtomicInteger(); |
| private final int _poolSize; |
| private final long _threadKeepAliveTimeout; |
| private final String _name; |
| private final int _numberOfSelectors; |
| private SelectorThread _selectorThread; |
| |
| public NetworkConnectionScheduler(final String name, |
| final int numberOfSelectors, int threadPoolSize, |
| long threadKeepAliveTimeout) |
| { |
| this(name, numberOfSelectors, threadPoolSize, threadKeepAliveTimeout, new ThreadFactory() |
| { |
| final AtomicInteger _count = new AtomicInteger(); |
| |
| @Override |
| public Thread newThread(final Runnable r) |
| { |
| Thread t = Executors.defaultThreadFactory().newThread(r); |
| t.setName("IO-pool-" + name + "-" + _count.incrementAndGet()); |
| return t; |
| } |
| }); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return "NetworkConnectionScheduler{" + |
| "_factory=" + _factory + |
| ", _executor=" + _executor + |
| ", _running=" + _running + |
| ", _poolSize=" + _poolSize + |
| ", _threadKeepAliveTimeout=" + _threadKeepAliveTimeout + |
| ", _name='" + _name + '\'' + |
| ", _numberOfSelectors=" + _numberOfSelectors + |
| ", _selectorThread=" + _selectorThread + |
| '}'; |
| } |
| |
| public NetworkConnectionScheduler(String name, |
| final int numberOfSelectors, int threadPoolSize, |
| long threadKeepAliveTimeout, |
| ThreadFactory factory) |
| { |
| _name = name; |
| _poolSize = threadPoolSize; |
| _threadKeepAliveTimeout = threadKeepAliveTimeout; |
| _factory = factory; |
| _numberOfSelectors = numberOfSelectors; |
| _selectorThreadName = "Selector-"+name; |
| } |
| |
| |
| public void start() |
| { |
| try |
| { |
| _selectorThread = new SelectorThread(this, _numberOfSelectors); |
| _executor = new ThreadPoolExecutor(_poolSize, _poolSize, |
| _threadKeepAliveTimeout, TimeUnit.MINUTES, |
| new LinkedBlockingQueue<Runnable>(), _factory); |
| _executor.prestartAllCoreThreads(); |
| _executor.allowCoreThreadTimeOut(true); |
| for(int i = 0 ; i < _poolSize; i++) |
| { |
| _executor.execute(_selectorThread); |
| } |
| } |
| catch (IOException e) |
| { |
| throw new TransportException(e); |
| } |
| } |
| |
| void processConnection(final SchedulableConnection connection) |
| { |
| Thread.currentThread().setName(connection.getThreadName()); |
| connection.doPreWork(); |
| boolean rerun; |
| do |
| { |
| rerun = false; |
| boolean closed = connection.doWork(); |
| if (!closed && connection.getScheduler() == this) |
| { |
| |
| if (connection.isStateChanged() || connection.isPartialRead()) |
| { |
| if (_running.get() == _poolSize) |
| { |
| connection.clearScheduled(); |
| schedule(connection); |
| } |
| else |
| { |
| rerun = true; |
| } |
| } |
| else |
| { |
| connection.clearScheduled(); |
| if (connection.isStateChanged()) |
| { |
| _selectorThread.addToWork(connection); |
| } |
| else |
| { |
| _selectorThread.returnConnectionToSelector(connection); |
| } |
| } |
| } |
| else if (connection.getScheduler() != this) |
| { |
| removeConnection(connection); |
| connection.clearScheduled(); |
| connection.getScheduler().addConnection(connection); |
| } |
| |
| } while (rerun); |
| |
| } |
| |
| void decrementRunningCount() |
| { |
| _running.decrementAndGet(); |
| } |
| |
| void incrementRunningCount() |
| { |
| _running.incrementAndGet(); |
| } |
| |
| public void close() |
| { |
| if(_selectorThread != null) |
| { |
| _selectorThread.close(); |
| } |
| if(_executor != null) |
| { |
| _executor.shutdown(); |
| } |
| } |
| |
| |
| public String getName() |
| { |
| return _name; |
| } |
| |
| public String getSelectorThreadName() |
| { |
| return _selectorThreadName; |
| } |
| |
| public void addAcceptingSocket(final ServerSocketChannel serverSocket, |
| final NonBlockingNetworkTransport nonBlockingNetworkTransport) |
| { |
| _selectorThread.addAcceptingSocket(serverSocket, nonBlockingNetworkTransport); |
| } |
| |
| public void cancelAcceptingSocket(final ServerSocketChannel serverSocket) |
| { |
| _selectorThread.cancelAcceptingSocket(serverSocket); |
| } |
| |
| public void addConnection(final SchedulableConnection connection) |
| { |
| _selectorThread.addConnection(connection); |
| } |
| |
| public void removeConnection(final SchedulableConnection connection) |
| { |
| _selectorThread.removeConnection(connection); |
| } |
| |
| int getPoolSize() |
| { |
| return _poolSize; |
| } |
| |
| public void schedule(final SchedulableConnection connection) |
| { |
| _selectorThread.addToWork(connection); |
| } |
| } |