| /** |
| * 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.activemq.transport.amqp; |
| |
| import java.io.DataOutputStream; |
| import java.io.EOFException; |
| import java.io.IOException; |
| import java.net.Socket; |
| import java.net.URI; |
| import java.net.UnknownHostException; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.SelectionKey; |
| import java.nio.channels.SocketChannel; |
| |
| import javax.net.SocketFactory; |
| |
| import org.apache.activemq.transport.nio.NIOOutputStream; |
| import org.apache.activemq.transport.nio.SelectorManager; |
| import org.apache.activemq.transport.nio.SelectorSelection; |
| import org.apache.activemq.transport.tcp.TcpTransport; |
| import org.apache.activemq.util.IOExceptionSupport; |
| import org.apache.activemq.util.ServiceStopper; |
| import org.apache.activemq.wireformat.WireFormat; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * An implementation of the {@link org.apache.activemq.transport.Transport} interface for using AMQP over NIO |
| */ |
| public class AmqpNioTransport extends TcpTransport { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(AmqpNioTransport.class); |
| |
| private SocketChannel channel; |
| private SelectorSelection selection; |
| private final AmqpFrameParser frameReader = new AmqpFrameParser(this); |
| |
| private ByteBuffer inputBuffer; |
| |
| public AmqpNioTransport(WireFormat wireFormat, SocketFactory socketFactory, URI remoteLocation, URI localLocation) throws UnknownHostException, IOException { |
| super(wireFormat, socketFactory, remoteLocation, localLocation); |
| |
| frameReader.setWireFormat((AmqpWireFormat) wireFormat); |
| } |
| |
| public AmqpNioTransport(WireFormat wireFormat, Socket socket) throws IOException { |
| super(wireFormat, socket); |
| |
| frameReader.setWireFormat((AmqpWireFormat) wireFormat); |
| } |
| |
| @Override |
| protected void initializeStreams() throws IOException { |
| channel = socket.getChannel(); |
| channel.configureBlocking(false); |
| // listen for events telling us when the socket is readable. |
| selection = SelectorManager.getInstance().register(channel, new SelectorManager.Listener() { |
| @Override |
| public void onSelect(SelectorSelection selection) { |
| if (!isStopped()) { |
| serviceRead(); |
| } |
| } |
| |
| @Override |
| public void onError(SelectorSelection selection, Throwable error) { |
| LOG.trace("Error detected: {}", error.getMessage()); |
| if (error instanceof IOException) { |
| onException((IOException) error); |
| } else { |
| onException(IOExceptionSupport.create(error)); |
| } |
| } |
| }); |
| |
| inputBuffer = ByteBuffer.allocate(8 * 1024); |
| NIOOutputStream outPutStream = new NIOOutputStream(channel, 8 * 1024); |
| this.dataOut = new DataOutputStream(outPutStream); |
| this.buffOut = outPutStream; |
| } |
| |
| boolean magicRead = false; |
| |
| private void serviceRead() { |
| try { |
| |
| while (isStarted()) { |
| // read channel |
| int readSize = channel.read(inputBuffer); |
| // channel is closed, cleanup |
| if (readSize == -1) { |
| onException(new EOFException()); |
| selection.close(); |
| break; |
| } |
| // nothing more to read, break |
| if (readSize == 0) { |
| break; |
| } |
| |
| receiveCounter += readSize; |
| |
| inputBuffer.flip(); |
| frameReader.parse(inputBuffer); |
| inputBuffer.clear(); |
| } |
| } catch (IOException e) { |
| onException(e); |
| } catch (Throwable e) { |
| onException(IOExceptionSupport.create(e)); |
| } |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| connect(); |
| selection.setInterestOps(SelectionKey.OP_READ); |
| selection.enable(); |
| } |
| |
| @Override |
| protected void doStop(ServiceStopper stopper) throws Exception { |
| try { |
| if (selection != null) { |
| selection.close(); |
| } |
| } finally { |
| super.doStop(stopper); |
| } |
| } |
| } |