Clover coverage report - ActiveIO - 1.0
Coverage timestamp: Fri Apr 22 2005 14:27:22 PDT
file stats: LOC: 162   Methods: 13
NCLOC: 90   Classes: 2
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 Source file Conditionals Statements Methods TOTAL
DatagramSocketSynchChannel.java 0% 0% 0% 0%
coverage
 1   
 /** 
 2   
  * 
 3   
  * Copyright 2004 Hiram Chirino
 4   
  * 
 5   
  * Licensed under the Apache License, Version 2.0 (the "License"); 
 6   
  * you may not use this file except in compliance with the License. 
 7   
  * You may obtain a copy of the License at 
 8   
  * 
 9   
  * http://www.apache.org/licenses/LICENSE-2.0
 10   
  * 
 11   
  * Unless required by applicable law or agreed to in writing, software
 12   
  * distributed under the License is distributed on an "AS IS" BASIS, 
 13   
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 14   
  * See the License for the specific language governing permissions and 
 15   
  * limitations under the License. 
 16   
  * 
 17   
  **/
 18   
 
 19   
 package org.activeio.net;
 20   
 
 21   
 import java.io.IOException;
 22   
 import java.net.DatagramPacket;
 23   
 import java.net.DatagramSocket;
 24   
 import java.net.SocketException;
 25   
 import java.net.SocketTimeoutException;
 26   
 
 27   
 import org.activeio.Packet;
 28   
 import org.activeio.SynchChannel;
 29   
 import org.activeio.SynchChannelServer;
 30   
 import org.activeio.Packet.ByteSequence;
 31   
 import org.activeio.packet.ByteArrayPacket;
 32   
 import org.activeio.packet.FilterPacket;
 33   
 
 34   
 /**
 35   
  * A {@see org.activeio.SynchChannel}implementation that uses
 36   
  * TCP to talk to the network.
 37   
  * 
 38   
  * @version $Revision$
 39   
  */
 40   
 final public class DatagramSocketSynchChannel implements SynchChannel {
 41   
 
 42   
     private final class UDPFilterPacket extends FilterPacket {
 43   
         private final DatagramPacket packet;
 44   
 
 45  0
         private UDPFilterPacket(Packet next, DatagramPacket packet) {
 46  0
             super(next);
 47  0
             this.packet = packet;
 48   
         }
 49   
 
 50  0
         public Object narrow(Class target) {
 51  0
             if( target == DatagramContext.class ) {
 52  0
                 return new DatagramContext(packet);
 53   
             }
 54  0
             return super.narrow(target);
 55   
         }
 56   
 
 57  0
         public Packet filter(Packet packet) {
 58  0
             return new UDPFilterPacket(packet, this.packet);
 59   
         }
 60   
     }
 61   
 
 62   
     private static final int DEFAULT_BUFFER_SIZE = 64 * 1024;
 63   
 
 64   
     private final DatagramSocket socket;
 65   
 
 66   
     private boolean disposed;
 67   
 
 68   
     private int curentSoTimeout;
 69   
 
 70   
     /**
 71   
      * Construct basic helpers
 72   
      * 
 73   
      * @param wireFormat
 74   
      * @throws IOException
 75   
      */
 76  0
     protected DatagramSocketSynchChannel(DatagramSocket socket) throws IOException {
 77  0
         this.socket = socket;
 78  0
         socket.setReceiveBufferSize(DEFAULT_BUFFER_SIZE);
 79  0
         socket.setSendBufferSize(DEFAULT_BUFFER_SIZE);
 80   
     }
 81   
     
 82   
     /**
 83   
      * @see org.activeio.SynchChannel#read(long)
 84   
      */
 85  0
     public org.activeio.Packet read(long timeout) throws IOException {
 86  0
         try {
 87   
 
 88  0
             if (timeout == SynchChannelServer.WAIT_FOREVER_TIMEOUT)
 89  0
                 setSoTimeout(0);
 90  0
             else if (timeout == SynchChannelServer.NO_WAIT_TIMEOUT)
 91  0
                 setSoTimeout(1);
 92   
             else
 93  0
                 setSoTimeout((int) timeout);
 94   
 
 95   
             // FYI: message data is truncated if biger than this buffer.
 96  0
             final byte data[] = new byte[DEFAULT_BUFFER_SIZE];
 97  0
             final DatagramPacket packet = new DatagramPacket(data, data.length);
 98  0
             socket.receive(packet);
 99   
             
 100   
             // A FilterPacket is used to provide the UdpDatagramContext via narrow.
 101  0
             return new UDPFilterPacket(new ByteArrayPacket(data, 0, packet.getLength()), packet);
 102   
             
 103   
         } catch (SocketTimeoutException e) {
 104  0
             return null;
 105   
         }
 106   
     }
 107   
 
 108  0
     private void setSoTimeout(int i) throws SocketException {
 109  0
         if (curentSoTimeout != i) {
 110  0
             socket.setSoTimeout(i);
 111  0
             curentSoTimeout = i;
 112   
         }
 113   
     }
 114   
 
 115   
     /**
 116   
      * @see org.activeio.Channel#write(org.activeio.channel.Packet)
 117   
      */
 118  0
     public void write(org.activeio.Packet packet) throws IOException {
 119  0
         ByteSequence sequence = packet.asByteSequence();
 120   
 
 121  0
         DatagramContext context = (DatagramContext) packet.narrow(DatagramContext.class);
 122  0
         if( context!=null ) {
 123  0
             socket.send(new DatagramPacket(sequence.getData(),sequence.getOffset(), sequence.getLength(), context.address, context.port.intValue()));
 124   
         } else {
 125  0
             socket.send(new DatagramPacket(sequence.getData(),sequence.getOffset(), sequence.getLength()));
 126   
         }
 127   
     }
 128   
 
 129   
     /**
 130   
      * @see org.activeio.Channel#flush()
 131   
      */
 132  0
     public void flush() throws IOException {
 133   
     }
 134   
 
 135   
     /**
 136   
      * @see org.activeio.Disposable#dispose()
 137   
      */
 138  0
     public void dispose() {
 139  0
         if (disposed)
 140  0
             return;
 141  0
         socket.close();
 142  0
         disposed = true;
 143   
     }
 144   
 
 145  0
     public void start() throws IOException {
 146   
     }
 147   
 
 148  0
     public void stop(long timeout) throws IOException {
 149   
     }
 150   
 
 151   
     
 152  0
     public Object narrow(Class target) {
 153  0
         if( target.isAssignableFrom(getClass()) ) {
 154  0
             return this;
 155   
         }
 156  0
         return null;
 157   
     }
 158   
 
 159  0
     public String toString() {
 160  0
         return "Datagram Connection: "+socket.getLocalSocketAddress()+" -> "+socket.getRemoteSocketAddress();
 161   
     }
 162   
 }