Clover coverage report - ActiveIO - 1.0 Coverage timestamp: Fri Apr 22 2005 14:27:22 PDT FRAMES NO FRAMES |
file stats: | LOC: | 182 |  | Methods: | 10
| NCLOC: | 125 |  | Classes: | 1
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Source file | Conditionals | Statements | Methods | TOTAL
NIOAsynchChannel.java | 57.1% | 67.7% | 70% | 65% |

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.io.InterruptedIOException;
23 |  |
     import java.net.SocketException;
24 |  |
     import java.nio.ByteBuffer;
25 |  |
     import java.nio.channels.SelectionKey;
26 |  |
     import java.nio.channels.SocketChannel;
27 |  |
28 |  |
     import org.activeio.AsynchChannel;
29 |  |
     import org.activeio.AsynchChannelListener;
30 |  |
     import org.activeio.Packet;
31 |  |
     import org.activeio.Packet.ByteSequence;
32 |  |
     import org.activeio.net.NIOAsynchChannelSelectorManager.SelectorManagerListener;
33 |  |
     import org.activeio.net.NIOAsynchChannelSelectorManager.SocketChannelAsynchChannelSelection;
34 |  |
     import org.activeio.packet.ByteBufferPacket;
35 |  |
     import org.activeio.packet.EOSPacket;
36 |  |
37 |  |
     /**
38 |  |
      * @version $Revision$
39 |  |
      */
40 |  |
     final public class NIOAsynchChannel extends NIOBaseChannel implements AsynchChannel {
41 |  |
42 |  |
         private AsynchChannelListener channelListener;
43 |  |
         private SocketChannelAsynchChannelSelection selection;
44 |  |
         private ByteBuffer inputByteBuffer;
45 |  |
         private boolean running;
46 |  |
47 | 15 |
         public NIOAsynchChannel(SocketChannel socketChannel, boolean useDirect) throws IOException {
48 | 15 |
             super(socketChannel, useDirect);
49 |  |
50 | 16 |
             socketChannel.configureBlocking(false);
51 | 16 |
             selection = NIOAsynchChannelSelectorManager.register(socketChannel, new SelectorManagerListener(){
52 | 2006 |
                 public void onSelect(SocketChannelAsynchChannelSelection selection) {
53 | 2006 |
                     String origName = Thread.currentThread().getName();
54 | 2006 |
                     if (selection.isReadable())
55 | 2006 |
                     try {
56 | 2006 |
                         Thread.currentThread().setName(NIOAsynchChannel.this.toString());
57 | 2006 |
                         serviceRead();
58 |  |
                      } catch ( Throwable e ) {
59 | 0 |
                          System.err.println("ActiveIO unexpected error: ");
60 | 0 |
                          e.printStackTrace(System.err);
61 |  |
                      } finally {
62 | 2006 |
                          Thread.currentThread().setName(origName);
63 |  |
                      }
64 |  |
                 }
65 |  |
             });
66 |  |
67 |  |
         }
68 |  |
69 | 2006 |
         private void serviceRead() {
70 | 2006 |
             try {
71 |  |
72 | 2006 |
                 while( true ) {
73 |  |
74 | 2008 |
                     if( inputByteBuffer==null || !inputByteBuffer.hasRemaining() ) {
75 | 8 |
                         inputByteBuffer = allocateBuffer();
76 |  |
                     }
77 |  |
78 | 2008 |
                     int size = socketChannel.read(inputByteBuffer);
79 | 2008 |
                     if( size == -1 ) {
80 | 2 |
                         this.channelListener.onPacket( EOSPacket.EOS_PACKET );
81 | 2 |
                         selection.close();
82 | 2 |
                         break;
83 |  |
                     }
84 |  |
85 | 2006 |
                     if( size==0 ) {
86 | 0 |
                         break;
87 |  |
                     }
88 |  |
89 |  |
                     // Per Mike Spile, some plaforms read 1 byte of data on the first read, and then
90 |  |
                     // a but load of data on the second read.  Try to load the butload here
91 | 2006 |
                     if( size == 1 && inputByteBuffer.hasRemaining() ) {
92 | 0 |
                         int size2 = socketChannel.read(inputByteBuffer);
93 | 0 |
                         if( size2 > 0 )
94 | 0 |
                                 size += size2;
95 |  |
                     }
96 |  |
97 | 2006 |
                     ByteBuffer remaining = inputByteBuffer.slice();
98 | 2006 |
                     Packet data = new ByteBufferPacket(((ByteBuffer)inputByteBuffer.flip()).slice());
99 | 2006 |
                     this.channelListener.onPacket( data );
100 |  |
101 |  |
                     // Keep the remaining buffer around to fill with data.
102 | 2006 |
                     inputByteBuffer = remaining;
103 |  |
104 | 2006 |
                     if( inputByteBuffer.hasRemaining() )
105 | 2004 |
                         break;
106 |  |
                 }
107 |  |
108 |  |
             } catch (IOException e) {
109 | 0 |
                 this.channelListener.onPacketError(e);
110 |  |
             }
111 |  |
         }
112 |  |
113 | 2004 |
         synchronized public void write(Packet packet) throws IOException {
114 |  |
115 | 2004 |
             ByteBuffer data;
116 | 2004 |
             if( packet.getClass()==ByteBufferPacket.class ) {
117 | 2004 |
                 data = ((ByteBufferPacket)packet).getByteBuffer();
118 |  |
             } else {
119 | 0 |
                 ByteSequence sequence = packet.asByteSequence();
120 | 0 |
                 data = ByteBuffer.wrap(sequence.getData(), sequence.getOffset(), sequence.getLength());
121 |  |
             }
122 |  |
123 | 2004 |
             long delay=1;
124 | 2004 |
             while( data.hasRemaining() ) {
125 |  |
126 |  |
                 // Since the write is non-blocking, all the data may not have been written.
127 | 2004 |
                 int r1 = data.remaining();
128 | 2004 |
                 socketChannel.write( data );
129 | 2004 |
                 int r2 = data.remaining();
130 |  |
131 |  |
                 // We may need to do a little bit of sleeping to avoid a busy loop.
132 |  |
                 // Slow down if no data was written out..
133 | 2004 |
                 if( r2>0 && r1-r2==0 ) {
134 | 0 |
                     try {
135 |  |
                         // Use exponential rollback to increase sleep time.
136 | 0 |
                         Thread.sleep(delay);
137 | 0 |
                         delay *= 5;
138 | 0 |
                         if( delay > 1000*1 ) {
139 | 0 |
                             delay = 1000;
140 |  |
                         }
141 |  |
                     } catch (InterruptedException e) {
142 | 0 |
                         throw new InterruptedIOException();
143 |  |
                     }
144 |  |
                 } else {
145 | 2004 |
                     delay = 1;
146 |  |
                 }
147 |  |
             }
148 |  |
         }
149 |  |
150 | 0 |
         public void flush() throws IOException {
151 |  |
         }
152 |  |
153 | 12 |
         public void setAsynchChannelListener(AsynchChannelListener channelListener) {
154 | 12 |
             this.channelListener = channelListener;
155 |  |
         }
156 |  |
157 | 0 |
         public AsynchChannelListener getAsynchChannelListener() {
158 | 0 |
             return channelListener;
159 |  |
         }
160 |  |
161 | 18 |
         public void dispose() {
162 | 18 |
             if( running && channelListener!=null ) {
163 | 14 |
                 channelListener.onPacketError(new SocketException("Socket closed."));
164 |  |
             }
165 | 18 |
             selection.close();
166 | 18 |
             super.dispose();
167 |  |
         }
168 |  |
169 | 12 |
         public void start() throws IOException {
170 | 12 |
             if( running )
171 | 0 |
                 return;
172 | 12 |
             running=true;
173 | 12 |
             selection.setInterestOps(SelectionKey.OP_READ);
174 |  |
         }
175 |  |
176 | 0 |
         public void stop(long timeout) throws IOException {
177 | 0 |
             if( !running )
178 | 0 |
                 return;
179 | 0 |
             running=false;
180 | 0 |
             selection.setInterestOps(0);
181 |  |
         }
182 |  |
      }