Clover coverage report - ActiveIO - 1.0
Coverage timestamp: Fri Apr 22 2005 14:27:22 PDT
Overview   Package   File
    FRAMES   NO FRAMES  
file stats: LOC: 130   Methods: 11
NCLOC: 83   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
SynchornizedSynchChannel.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    
 package org.activeio.filter;
 18    
 
 19    
 import java.io.IOException;
 20    
 import java.io.InterruptedIOException;
 21    
 
 22    
 import org.activeio.FilterSynchChannel;
 23    
 import org.activeio.Packet;
 24    
 import org.activeio.SynchChannel;
 25    
 import org.activeio.SynchChannelServer;
 26    
 
 27    
 import EDU.oswego.cs.dl.util.concurrent.Mutex;
 28    
 import EDU.oswego.cs.dl.util.concurrent.Sync;
 29    
 
 30    
 /**
 31    
  * Used to synchronize concurrent access to a SynchChannel.
 32    
  *
 33    
  * Uses two different {@see EDU.oswego.cs.dl.util.concurrent.Sync} objects
 34    
  * for write and read operations.  All other operations such as {@see #stop(long)}
 35    
  * and {@see #stop} just do a normal java synchronization against the SynchornizedSynchChannel
 36    
  * object instance.
 37    
  *
 38    
  */
 39    
 public class SynchornizedSynchChannel extends FilterSynchChannel {
 40    
 
 41    
     private final Sync readLock;
 42    
     private final Sync writeLock;
 43    
 
 44  0 
     public SynchornizedSynchChannel(SynchChannel next) {
 45  0 
         this(next, new Mutex(), new Mutex());
 46    
     }
 47    
 
 48  0 
     public SynchornizedSynchChannel(SynchChannel next, Sync readLock, Sync writeLock) {
 49  0 
         super(next);
 50  0 
         this.readLock = readLock;
 51  0 
         this.writeLock = writeLock;
 52    
     }
 53    
 
 54  0 
     public Packet read(long timeout) throws IOException {
 55  0 
         try {
 56    
 
 57  0 
             if( timeout==SynchChannelServer.WAIT_FOREVER_TIMEOUT ) {
 58  0 
                 readLock.acquire();
 59    
             } else {
 60  0 
                 long start = System.currentTimeMillis();
 61  0 
                 if( !readLock.attempt(0) ) {
 62  0 
                     return null;
 63    
                 }
 64    
                 // Adjust the resulting timeout down to account for time taken to
 65    
                 // get the readLock.
 66  0 
                 timeout = Math.max(0, timeout-(System.currentTimeMillis()-start));
 67    
             }
 68    
 
 69    
         } catch (InterruptedException e) {
 70  0 
             throw new InterruptedIOException(e.getMessage());
 71    
         }
 72    
 
 73  0 
         try {
 74  0 
             return getNext().read(timeout);
 75    
         } finally {
 76  0 
             readLock.release();
 77    
         }
 78    
     }
 79    
 
 80  0 
     public void write(Packet packet) throws IOException {
 81  0 
         try {
 82  0 
             writeLock.acquire();
 83    
         } catch (InterruptedException e) {
 84  0 
             throw new InterruptedIOException(e.getMessage());
 85    
         }
 86  0 
         try {
 87  0 
             getNext().write(packet);
 88    
         } finally {
 89  0 
             writeLock.release();
 90    
         }
 91    
     }
 92    
 
 93  0 
     public void flush() throws IOException {
 94  0 
         try {
 95  0 
             writeLock.acquire();
 96    
         } catch (InterruptedException e) {
 97  0 
             throw new InterruptedIOException(e.getMessage());
 98    
         }
 99  0 
         try {
 100  0 
             getNext().flush();
 101    
         } finally {
 102  0 
             writeLock.release();
 103    
         }
 104    
     }
 105    
 
 106  0 
     synchronized public void dispose() {
 107  0 
         super.dispose();
 108    
     }
 109    
 
 110  0 
     synchronized public Object narrow(Class target) {
 111  0 
         return super.narrow(target);
 112    
     }
 113    
 
 114  0 
     synchronized public void start() throws IOException {
 115  0 
         super.start();
 116    
     }
 117    
 
 118  0 
     synchronized public void stop(long timeout) throws IOException {
 119  0 
         super.stop(timeout);
 120    
     }
 121    
 
 122  0 
     public Sync getReadLock() {
 123  0 
         return readLock;
 124    
     }
 125    
 
 126  0 
     public Sync getWriteLock() {
 127  0 
         return writeLock;
 128    
     }
 129    
 }
 130    
 
 
CloverReport generated by Clover v1.2.3
Fri Apr 22 2005 14:27:23 PDT.		   30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it.