ActiveIO - 1.0

Clover coverage report - ActiveIO - 1.0 Coverage timestamp: Fri Apr 22 2005 14:27:22 PDT FRAMES NO FRAMES |
file stats: | LOC: | 172 |  | Methods: | 17
| NCLOC: | 125 |  | Classes: | 2
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Source file | Conditionals | Statements | Methods | TOTAL
VMPipeAsynchChannelPipe.java | 50% | 61.4% | 70.6% | 59.4% |

1 |  |
     /**
2 |  |
      *
3 |  |
      * Copyright 2004 Protique Ltd
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 |  |
     package org.activeio.net;
19 |  |
20 |  |
     import java.io.IOException;
21 |  |
     import java.io.InterruptedIOException;
22 |  |
23 |  |
     import org.activeio.AsynchChannel;
24 |  |
     import org.activeio.AsynchChannelListener;
25 |  |
     import org.activeio.Packet;
26 |  |
     import org.activeio.packet.EOSPacket;
27 |  |
28 |  |
     import EDU.oswego.cs.dl.util.concurrent.Semaphore;
29 |  |
30 |  |
     /**
31 |  |
      * Used to connect the bottom ends of two Asynch channel stacks.
32 |  |
      *
33 |  |
      */
34 |  |
     final public class VMPipeAsynchChannelPipe {
35 |  |
36 |  |
         final PipeChannel leftChannel = new PipeChannel();
37 |  |
         final PipeChannel rightChannel = new PipeChannel();
38 |  |
39 |  |
         final public static class PipeChannel implements AsynchChannel {
40 |  |
41 |  |
             private PipeChannel sibiling;
42 |  |
             private AsynchChannelListener channelListener;
43 |  |
             private final Semaphore runMutext = new Semaphore(0);
44 |  |
             private boolean disposed;
45 |  |
             private boolean running;
46 |  |
47 | 32 |
             public PipeChannel() {
48 |  |
             }
49 |  |
50 | 28 |
             public void setAsynchChannelListener(AsynchChannelListener channelListener) {
51 | 28 |
                 this.channelListener = channelListener;
52 |  |
             }
53 | 0 |
             public AsynchChannelListener getAsynchChannelListener() {
54 | 0 |
                 return channelListener;
55 |  |
             }
56 |  |
57 | 4008 |
             public void write(Packet packet) throws IOException {
58 | 4008 |
                 if( disposed )
59 | 0 |
                     throw new IOException("Conneciton closed.");
60 | 4008 |
                 sibiling.onPacket(packet, WAIT_FOREVER_TIMEOUT);
61 |  |
             }
62 |  |
63 | 4040 |
             private void onPacket(Packet packet, long timeout) throws IOException {
64 | 4040 |
                 try {
65 | 4040 |
                     if( timeout == NO_WAIT_TIMEOUT ) {
66 | 32 |
                         if( !runMutext.attempt(0) )
67 | 4 |
                             return;
68 | 4008 |
                     } else if( timeout == WAIT_FOREVER_TIMEOUT ) {
69 | 4008 |
                         runMutext.acquire();
70 |  |
                     } else {
71 | 0 |
                         if( !runMutext.attempt(timeout) )
72 | 0 |
                             return;
73 |  |
                     }
74 |  |
                 } catch (InterruptedException e) {
75 | 0 |
                     throw new InterruptedIOException();
76 |  |
                 }
77 | 4036 |
                 try {
78 | 4036 |
                     if( disposed ) {
79 | 16 |
                         throw new IOException("Peer connection closed.");
80 |  |
                     }
81 | 4020 |
                     channelListener.onPacket(packet);
82 |  |
                 } finally {
83 | 4036 |
                     runMutext.release();
84 |  |
                 }
85 |  |
             }
86 |  |
87 | 2004 |
             public void flush() throws IOException {
88 |  |
             }
89 |  |
90 | 24 |
             public void start() throws IOException {
91 | 24 |
                 if(running)
92 | 0 |
                     return;
93 | 24 |
                 if( channelListener==null )
94 | 0 |
                     throw new IOException("channelListener has not been set.");
95 | 24 |
                 running=true;
96 | 24 |
                 runMutext.release();
97 |  |
             }
98 |  |
99 | 0 |
             public void stop(long timeout) throws IOException {
100 | 0 |
                 if(!running)
101 | 0 |
                     return;
102 | 0 |
                 try {
103 | 0 |
                     if( timeout == NO_WAIT_TIMEOUT ) {
104 | 0 |
                         if( !runMutext.attempt(0) )
105 | 0 |
                             return;
106 | 0 |
                     } else if( timeout == WAIT_FOREVER_TIMEOUT ) {
107 | 0 |
                         runMutext.acquire();
108 |  |
                     } else {
109 | 0 |
                         if( !runMutext.attempt(timeout) )
110 | 0 |
                             return;
111 |  |
                     }
112 | 0 |
                     running=false;
113 |  |
                 } catch (InterruptedException e) {
114 | 0 |
                     throw new InterruptedIOException();
115 |  |
                 }
116 |  |
             }
117 |  |
118 | 36 |
             public void dispose() {
119 | 36 |
                 if( disposed )
120 | 4 |
                     return;
121 |  |
122 | 32 |
                 if( running && channelListener!=null ) {
123 | 24 |
                     this.channelListener.onPacketError(new IOException("Pipe closed."));
124 | 24 |
                     running=false;
125 |  |
                 }
126 | 32 |
                 disposed = true;
127 | 32 |
                 runMutext.release();
128 |  |
129 | 32 |
                 try {
130 |  |
                     // Inform the peer of the End Of Stream if he's listening.
131 | 32 |
                     sibiling.onPacket(EOSPacket.EOS_PACKET, NO_WAIT_TIMEOUT);
132 |  |
                 } catch (IOException e) {
133 |  |
                 }
134 |  |
             }
135 |  |
136 | 0 |
             public PipeChannel getSibiling() {
137 | 0 |
                 return sibiling;
138 |  |
             }
139 | 32 |
             public void setSibiling(PipeChannel sibiling) {
140 | 32 |
                 this.sibiling = sibiling;
141 |  |
             }
142 |  |
143 | 26 |
             public Object narrow(Class target) {
144 | 26 |
                 if( target.isAssignableFrom(getClass()) ) {
145 | 8 |
                     return this;
146 |  |
                 }
147 | 18 |
                 return null;
148 |  |
             }
149 |  |
150 | 0 |
             public String getId() {
151 | 0 |
                 return "0x"+Integer.toHexString(System.identityHashCode(this));
152 |  |
             }
153 |  |
154 | 0 |
             public String toString() {
155 | 0 |
                 return "Pipe Channel from "+getId()+" to "+sibiling.getId();
156 |  |
             }
157 |  |
         }
158 |  |
159 | 16 |
         public VMPipeAsynchChannelPipe() {
160 | 16 |
             leftChannel.setSibiling(rightChannel);
161 | 16 |
             rightChannel.setSibiling(leftChannel);
162 |  |
         }
163 |  |
164 | 16 |
         public AsynchChannel getLeftAsynchChannel() {
165 | 16 |
             return leftChannel;
166 |  |
         }
167 |  |
168 | 16 |
         public AsynchChannel getRightAsynchChannel() {
169 | 16 |
             return rightChannel;
170 |  |
         }
171 |  |
     }
172 |  |