Clover coverage report - ActiveIO - 1.0 Coverage timestamp: Fri Apr 22 2005 14:27:22 PDT FRAMES NO FRAMES |
file stats: | LOC: | 93 |  | Methods: | 4
| NCLOC: | 44 |  | Classes: | 1
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Source file | Conditionals | Statements | Methods | TOTAL
PacketAggregatingSynchChannel.java | 60% | 80% | 100% | 76.5% |

1 |  |
     /**
2 |  |
      *
3 |  |
      * Copyright 2004 Hiram Chirino
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      *
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      *  Licensed under the Apache License, Version 2.0 (the "License");
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      *  you may not use this file except in compliance with the License.
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      *  You may obtain a copy of the License at
8 |  |
      *
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      *     http://www.apache.org/licenses/LICENSE-2.0
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      *
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      *  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 |  |
     package org.activeio.filter;
18 |  |
19 |  |
     import java.io.IOException;
20 |  |
     import java.util.LinkedList;
21 |  |
22 |  |
     import org.activeio.FilterSynchChannel;
23 |  |
     import org.activeio.Packet;
24 |  |
     import org.activeio.SynchChannel;
25 |  |
26 |  |
     /**
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      * This PacketAggregatingSynchChannel can be used when the client is sending a
28 |  |
      * 'record' style packet down the channel stack and needs receiving end to
29 |  |
      * receive the same 'record' packets.
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      *
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      * This is very usefull since in general, a channel does not garantee that a
32 |  |
      * Packet that is sent down will not be fragmented or combined with other Packet
33 |  |
      * objects.
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      *
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      * This {@see org.activeio.SynchChannel} adds a 4 byte header
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      * to each packet that is sent down.
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      *
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      * @version $Revision$
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      */
40 |  |
     final public class PacketAggregatingSynchChannel extends FilterSynchChannel {
41 |  |
42 |  |
         private final LinkedList assembledPackets = new LinkedList();
43 |  |
         private final PacketAggregator aggregator = new PacketAggregator() {
44 | 10 |
             protected void packetAssembled(Packet packet) {
45 | 10 |
                 assembledPackets.addLast(packet);
46 |  |
             }
47 |  |
         };
48 |  |
49 |  |
         /**
50 |  |
          * @param next
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          */
52 | 2 |
         public PacketAggregatingSynchChannel(SynchChannel next) {
53 | 2 |
             super(next);
54 |  |
         }
55 |  |
56 | 10 |
         public Packet read(long timeout) throws IOException {
57 | 10 |
             long start = System.currentTimeMillis();
58 | 10 |
             if( assembledPackets.isEmpty() ) {
59 | 10 |
                 while( true ) {
60 |  |
61 | 15 |
                     Packet packet = getNext().read(timeout);
62 | 15 |
                     if( packet==null ) {
63 | 0 |
                         return null;
64 |  |
                     }
65 |  |
66 | 15 |
                     aggregator.addRawPacket(packet);
67 |  |
68 |  |
                     // Should we try to get more packets?
69 | 15 |
                     if( assembledPackets.isEmpty() ) {
70 | 5 |
                         if( timeout == WAIT_FOREVER_TIMEOUT )
71 | 0 |
                             continue;
72 |  |
73 | 5 |
                         timeout = Math.max(0, timeout-(System.currentTimeMillis()-start));
74 | 5 |
                         if( timeout != 0 )
75 | 5 |
                             continue;
76 |  |
77 | 0 |
                         return null;
78 |  |
                     } else {
79 | 10 |
                         return (Packet) assembledPackets.removeFirst();
80 |  |
                     }
81 |  |
                 }
82 |  |
83 |  |
             } else {
84 | 0 |
                 return (Packet) assembledPackets.removeFirst();
85 |  |
             }
86 |  |
87 |  |
         }
88 |  |
89 | 10 |
         public void write(Packet packet) throws IOException {
90 | 10 |
             getNext().write(aggregator.getHeader(packet));
91 | 10 |
             getNext().write(packet);
92 |  |
         }
93 |  |
     }