Clover coverage report - ActiveIO - 1.0
Coverage timestamp: Fri Apr 22 2005 14:27:22 PDT
file stats: LOC: 144   Methods: 10
NCLOC: 77   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
BatchedWrite.java 45% 63.9% 80% 60.6%
coverage 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   
 package org.activeio.journal.active;
 19   
 
 20   
 import org.activeio.Packet;
 21   
 
 22   
 import EDU.oswego.cs.dl.util.concurrent.Latch;
 23   
 
 24   
 /**
 25   
  * This contains all the data needed to write and force a list of records to a
 26   
  * LogFile. The more records that can be cramed into a single BatchedWrite, the
 27   
  * higher throughput that can be achived by a write and force operation.
 28   
  * 
 29   
  * @version $Revision: 1.1 $
 30   
  */
 31   
 final public class BatchedWrite {
 32   
 
 33   
     private final Packet packet;
 34   
     public Throwable error;
 35   
     private Location mark;
 36   
     private boolean appendDisabled = false;
 37   
     private boolean appendInProgress = false;
 38   
     private Latch writeDoneLatch;
 39   
 
 40   
     /**
 41   
      * @param packet
 42   
      */
 43  20
     public BatchedWrite(Packet packet) {
 44  20
         this.packet = packet;
 45   
     }
 46   
 
 47   
     /**
 48   
      * @throws InterruptedException
 49   
      * 
 50   
      */
 51  20
     synchronized private void disableAppend() throws InterruptedException {
 52  20
         appendDisabled = true;
 53  20
         while (appendInProgress) {
 54  0
             wait();
 55   
         }
 56   
     }
 57   
 
 58   
     /**
 59   
      * @param packet2
 60   
      * @param mark2
 61   
      * @return
 62   
      */
 63  24
     public boolean append(Record record, Location recordMark, boolean force) {
 64   
 
 65  24
         synchronized (this) {
 66  24
             if (appendDisabled)
 67  2
                 return false;
 68  22
             appendInProgress = true;
 69   
         }
 70   
         
 71   
         
 72  22
         if( force && writeDoneLatch==null)
 73  16
             writeDoneLatch = new Latch();
 74   
         
 75  22
         record.read(packet);
 76   
 
 77   
         // if we fit the record in this batch
 78  22
         if ( !record.hasRemaining() ) {
 79  22
             if (recordMark != null)
 80  0
                 mark = recordMark;
 81   
         }
 82   
 
 83  22
         synchronized (this) {
 84  22
             appendInProgress = false;
 85  22
             this.notify();
 86   
 
 87  22
             if (appendDisabled)
 88  0
                 return false;
 89   
             else
 90  22
                 return packet.remaining() > 0;
 91   
         }
 92   
     }
 93   
 
 94  0
     public void waitForForce() throws Throwable {
 95  0
         if( writeDoneLatch!=null ) {
 96  0
             writeDoneLatch.acquire();
 97  0
             synchronized (this) {
 98  0
                 if (error != null)
 99  0
                     throw error;
 100   
             }
 101   
         }
 102   
     }
 103   
 
 104  4
     public void forced() {
 105  4
         if( writeDoneLatch!=null ) {
 106  0
             writeDoneLatch.release();
 107   
         }
 108   
     }
 109   
 
 110  0
     public void writeFailed(Throwable error) {
 111  0
         if( writeDoneLatch!=null ) {
 112  0
             synchronized (this) {
 113  0
                 this.error = error;
 114   
             }
 115  0
             writeDoneLatch.release();
 116   
         }
 117   
     }
 118   
 
 119  24
     public Packet getPacket() {
 120  24
         return packet;
 121   
     }
 122   
 
 123   
     /**
 124   
      * @return
 125   
      */
 126  20
     public Location getMark() {
 127  20
         return mark;
 128   
     }
 129   
 
 130   
     /**
 131   
      * @throws InterruptedException
 132   
      * 
 133   
      */
 134  20
     public void flip() throws InterruptedException {
 135  20
         disableAppend();
 136  20
         packet.flip();
 137   
     }
 138   
 
 139  20
     public boolean getForce() {
 140  20
         return writeDoneLatch!=null;
 141   
     }
 142   
 
 143   
 }
 144