diff options
Diffstat (limited to 'qpid/java/common/src/main/java/org/apache/mina/transport/socket/nio/MultiThreadSocketConnector.java')
| -rw-r--r-- | qpid/java/common/src/main/java/org/apache/mina/transport/socket/nio/MultiThreadSocketConnector.java | 486 |
1 files changed, 486 insertions, 0 deletions
diff --git a/qpid/java/common/src/main/java/org/apache/mina/transport/socket/nio/MultiThreadSocketConnector.java b/qpid/java/common/src/main/java/org/apache/mina/transport/socket/nio/MultiThreadSocketConnector.java new file mode 100644 index 0000000000..7344f70078 --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/mina/transport/socket/nio/MultiThreadSocketConnector.java @@ -0,0 +1,486 @@ +/* + * 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.mina.transport.socket.nio; + +import edu.emory.mathcs.backport.java.util.concurrent.Executor; +import org.apache.mina.common.ConnectFuture; +import org.apache.mina.common.ExceptionMonitor; +import org.apache.mina.common.IoConnector; +import org.apache.mina.common.IoConnectorConfig; +import org.apache.mina.common.IoHandler; +import org.apache.mina.common.IoServiceConfig; +import org.apache.mina.common.support.AbstractIoFilterChain; +import org.apache.mina.common.support.DefaultConnectFuture; +import org.apache.mina.util.NamePreservingRunnable; +import org.apache.mina.util.NewThreadExecutor; +import org.apache.mina.util.Queue; + +import java.io.IOException; +import java.net.ConnectException; +import java.net.InetSocketAddress; +import java.net.SocketAddress; +import java.nio.channels.SelectionKey; +import java.nio.channels.Selector; +import java.nio.channels.SocketChannel; +import java.util.Iterator; +import java.util.Set; + +/** + * {@link IoConnector} for socket transport (TCP/IP). + * + * @author The Apache Directory Project (mina-dev@directory.apache.org) + * @version $Rev: 619823 $, $Date: 2008-02-08 10:09:37 +0000 (Fri, 08 Feb 2008) $ + */ +public class MultiThreadSocketConnector extends SocketConnector +{ + /** @noinspection StaticNonFinalField */ + private static volatile int nextId = 0; + + private final Object lock = new Object(); + private final int id = nextId++; + private final String threadName = "SocketConnector-" + id; + + private final Queue connectQueue = new Queue(); + private final MultiThreadSocketIoProcessor[] ioProcessors; + private final int processorCount; + private final Executor executor; + + /** @noinspection FieldAccessedSynchronizedAndUnsynchronized */ + private Selector selector; + private Worker worker; + private int processorDistributor = 0; + private int workerTimeout = 60; // 1 min. + + /** Create a connector with a single processing thread using a NewThreadExecutor */ + public MultiThreadSocketConnector() + { + this(1, new NewThreadExecutor()); + } + + /** + * Create a connector with the desired number of processing threads + * + * @param processorCount Number of processing threads + * @param executor Executor to use for launching threads + */ + public MultiThreadSocketConnector(int processorCount, Executor executor) + { + if (processorCount < 1) + { + throw new IllegalArgumentException("Must have at least one processor"); + } + + this.executor = executor; + this.processorCount = processorCount; + ioProcessors = new MultiThreadSocketIoProcessor[processorCount]; + + for (int i = 0; i < processorCount; i++) + { + ioProcessors[i] = new MultiThreadSocketIoProcessor("SocketConnectorIoProcessor-" + id + "." + i, executor); + } + } + + /** + * How many seconds to keep the connection thread alive between connection requests + * + * @return Number of seconds to keep connection thread alive + */ + public int getWorkerTimeout() + { + return workerTimeout; + } + + /** + * Set how many seconds the connection worker thread should remain alive once idle before terminating itself. + * + * @param workerTimeout Number of seconds to keep thread alive. Must be >=0 + */ + public void setWorkerTimeout(int workerTimeout) + { + if (workerTimeout < 0) + { + throw new IllegalArgumentException("Must be >= 0"); + } + this.workerTimeout = workerTimeout; + } + + public ConnectFuture connect(SocketAddress address, IoHandler handler, IoServiceConfig config) + { + return connect(address, null, handler, config); + } + + public ConnectFuture connect(SocketAddress address, SocketAddress localAddress, + IoHandler handler, IoServiceConfig config) + { + if (address == null) + { + throw new NullPointerException("address"); + } + if (handler == null) + { + throw new NullPointerException("handler"); + } + + if (!(address instanceof InetSocketAddress)) + { + throw new IllegalArgumentException("Unexpected address type: " + + address.getClass()); + } + + if (localAddress != null && !(localAddress instanceof InetSocketAddress)) + { + throw new IllegalArgumentException("Unexpected local address type: " + + localAddress.getClass()); + } + + if (config == null) + { + config = getDefaultConfig(); + } + + SocketChannel ch = null; + boolean success = false; + try + { + ch = SocketChannel.open(); + ch.socket().setReuseAddress(true); + if (localAddress != null) + { + ch.socket().bind(localAddress); + } + + ch.configureBlocking(false); + + if (ch.connect(address)) + { + DefaultConnectFuture future = new DefaultConnectFuture(); + newSession(ch, handler, config, future); + success = true; + return future; + } + + success = true; + } + catch (IOException e) + { + return DefaultConnectFuture.newFailedFuture(e); + } + finally + { + if (!success && ch != null) + { + try + { + ch.close(); + } + catch (IOException e) + { + ExceptionMonitor.getInstance().exceptionCaught(e); + } + } + } + + ConnectionRequest request = new ConnectionRequest(ch, handler, config); + synchronized (lock) + { + try + { + startupWorker(); + } + catch (IOException e) + { + try + { + ch.close(); + } + catch (IOException e2) + { + ExceptionMonitor.getInstance().exceptionCaught(e2); + } + + return DefaultConnectFuture.newFailedFuture(e); + } + } + + synchronized (connectQueue) + { + connectQueue.push(request); + } + selector.wakeup(); + + return request; + } + + private synchronized void startupWorker() throws IOException + { + if (worker == null) + { + selector = Selector.open(); + worker = new Worker(); + executor.execute(new NamePreservingRunnable(worker)); + } + } + + private void registerNew() + { + if (connectQueue.isEmpty()) + { + return; + } + + for (; ;) + { + ConnectionRequest req; + synchronized (connectQueue) + { + req = (ConnectionRequest) connectQueue.pop(); + } + + if (req == null) + { + break; + } + + SocketChannel ch = req.channel; + try + { + ch.register(selector, SelectionKey.OP_CONNECT, req); + } + catch (IOException e) + { + req.setException(e); + } + } + } + + private void processSessions(Set keys) + { + Iterator it = keys.iterator(); + + while (it.hasNext()) + { + SelectionKey key = (SelectionKey) it.next(); + + if (!key.isConnectable()) + { + continue; + } + + SocketChannel ch = (SocketChannel) key.channel(); + ConnectionRequest entry = (ConnectionRequest) key.attachment(); + + boolean success = false; + try + { + ch.finishConnect(); + newSession(ch, entry.handler, entry.config, entry); + success = true; + } + catch (Throwable e) + { + entry.setException(e); + } + finally + { + key.cancel(); + if (!success) + { + try + { + ch.close(); + } + catch (IOException e) + { + ExceptionMonitor.getInstance().exceptionCaught(e); + } + } + } + } + + keys.clear(); + } + + private void processTimedOutSessions(Set keys) + { + long currentTime = System.currentTimeMillis(); + Iterator it = keys.iterator(); + + while (it.hasNext()) + { + SelectionKey key = (SelectionKey) it.next(); + + if (!key.isValid()) + { + continue; + } + + ConnectionRequest entry = (ConnectionRequest) key.attachment(); + + if (currentTime >= entry.deadline) + { + entry.setException(new ConnectException()); + try + { + key.channel().close(); + } + catch (IOException e) + { + ExceptionMonitor.getInstance().exceptionCaught(e); + } + finally + { + key.cancel(); + } + } + } + } + + private void newSession(SocketChannel ch, IoHandler handler, IoServiceConfig config, ConnectFuture connectFuture) + throws IOException + { + MultiThreadSocketSessionImpl session = + new MultiThreadSocketSessionImpl(this, nextProcessor(), getListeners(), + config, ch, handler, ch.socket().getRemoteSocketAddress()); + + //new interface +// SocketSessionImpl session = new SocketSessionImpl( +// this, nextProcessor(), getListeners(), +// config, ch, handler, ch.socket().getRemoteSocketAddress() ); + try + { + getFilterChainBuilder().buildFilterChain(session.getFilterChain()); + config.getFilterChainBuilder().buildFilterChain(session.getFilterChain()); + config.getThreadModel().buildFilterChain(session.getFilterChain()); + } + catch (Throwable e) + { + throw (IOException) new IOException("Failed to create a session.").initCause(e); + } + + // Set the ConnectFuture of the specified session, which will be + // removed and notified by AbstractIoFilterChain eventually. + session.setAttribute( AbstractIoFilterChain.CONNECT_FUTURE, connectFuture ); + + // Forward the remaining process to the SocketIoProcessor. + session.getIoProcessor().addNew(session); + } + + private MultiThreadSocketIoProcessor nextProcessor() + { + return ioProcessors[processorDistributor++ % processorCount]; + } + + private class Worker implements Runnable + { + private long lastActive = System.currentTimeMillis(); + + public void run() + { + Thread.currentThread().setName(MultiThreadSocketConnector.this.threadName); + + for (; ;) + { + try + { + int nKeys = selector.select(1000); + + registerNew(); + + if (nKeys > 0) + { + processSessions(selector.selectedKeys()); + } + + processTimedOutSessions(selector.keys()); + + if (selector.keys().isEmpty()) + { + if (System.currentTimeMillis() - lastActive > workerTimeout * 1000L) + { + synchronized (lock) + { + if (selector.keys().isEmpty() && + connectQueue.isEmpty()) + { + worker = null; + try + { + selector.close(); + } + catch (IOException e) + { + ExceptionMonitor.getInstance().exceptionCaught(e); + } + finally + { + selector = null; + } + break; + } + } + } + } + else + { + lastActive = System.currentTimeMillis(); + } + } + catch (IOException e) + { + ExceptionMonitor.getInstance().exceptionCaught(e); + + try + { + Thread.sleep(1000); + } + catch (InterruptedException e1) + { + ExceptionMonitor.getInstance().exceptionCaught(e1); + } + } + } + } + } + + private class ConnectionRequest extends DefaultConnectFuture + { + private final SocketChannel channel; + private final long deadline; + private final IoHandler handler; + private final IoServiceConfig config; + + private ConnectionRequest(SocketChannel channel, IoHandler handler, IoServiceConfig config) + { + this.channel = channel; + long timeout; + if (config instanceof IoConnectorConfig) + { + timeout = ((IoConnectorConfig) config).getConnectTimeoutMillis(); + } + else + { + timeout = ((IoConnectorConfig) getDefaultConfig()).getConnectTimeoutMillis(); + } + this.deadline = System.currentTimeMillis() + timeout; + this.handler = handler; + this.config = config; + } + } +} |