Mercurial > hg > blitz_stable

annotate src/org/dancres/blitz/disk/WriteDaemon.java @ 35:6f68e94c1fb8 default tip

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Add CondensedStats monitoring utility, equivalent to vmstat
author Dominic Cleal <dominic-cleal@cdo2.com>
date Thu, 05 Aug 2010 11:07:25 +0100
parents 3dc0c5604566
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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1 package org.dancres.blitz.disk;
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2
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3 import java.util.logging.*;
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4
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5 import net.jini.config.ConfigurationException;
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6
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7 import EDU.oswego.cs.dl.util.concurrent.LinkedQueue;
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8 import EDU.oswego.cs.dl.util.concurrent.PooledExecutor;
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9
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10 import org.dancres.blitz.Logging;
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11
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12 import org.dancres.blitz.ActiveObject;
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13 import org.dancres.blitz.ActiveObjectRegistry;
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14
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15 import org.dancres.blitz.config.ConfigurationFactory;
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16
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17 import org.dancres.blitz.task.Tasks;
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18 import org.dancres.blitz.task.Task;
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19
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20 import org.dancres.blitz.stats.StatGenerator;
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21 import org.dancres.blitz.stats.Stat;
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22 import org.dancres.blitz.stats.StatsBoard;
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23 import org.dancres.blitz.stats.IOStat;
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24
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25 /**
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26 <p> Certain elements of Blitz (such as ArcCache) require all writes to be
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27 asynchronous to avoid deadlock situations and reduce time spent waiting for
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28 I/O completion by a client thread. WriteDaemon provides the asynchronous
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29 I/O infrastructure to satisfy such requirements. </p>
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30
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31 <p> We stop when Disk is stop'd which allows for proper sync'ing </p>
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32
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33 <p>We can only have one thread for writing at this moment because:
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34 <ol>
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35 <li>WriteBuffer assumes serialized updating of images. If two threads
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36 start performing jobs on the same UID, then there's currently scope for
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37 a collision. The problem is compounded by the fact that we can't simply
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38 requeue the job because that will break checkpointing/sync'ing</li>
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39 <li>Sync'ing assumes that there's only one thread which will execute the
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40 appropriate callback placed in the queue once all prior Jobs have been
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41 dispatched. This ordering dependency is what complicates the WriteBuffer
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42 issue above.</li>
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43 <li>There's an ordering issue - we must write before we decide to then
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44 delete something that is on disk.</li>
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45 </ol>
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46 </p>
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47
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48 @see org.dancres.blitz.arc.ArcCache
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49 */
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50 public class WriteDaemon implements StatGenerator {
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51 static Logger theLogger =
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52 Logging.newLogger("org.dancres.blitz.disk.WriteDaemon");
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53
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54 private static int MAX_WRITE_THREADS;
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55 private static int THREAD_KEEPALIVE;
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56 private static int DESIRED_PENDING_WRITES;
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57 private static int THROTTLE_PENDING_WRITES;
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58 private static long THROTTLE_PAUSE;
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59
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60 static {
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61 try {
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62 MAX_WRITE_THREADS = ((Integer)
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63 ConfigurationFactory.getEntry("maxWriteThreads",
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64 int.class,
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65 new Integer(5))).intValue();
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66 THREAD_KEEPALIVE = ((Integer)
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67 ConfigurationFactory.getEntry("threadKeepalive",
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68 int.class,
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69 new Integer(60000))).intValue();
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70 DESIRED_PENDING_WRITES = ((Integer)
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71 ConfigurationFactory.getEntry("desiredPendingWrites",
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72 int.class,
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73 new Integer(20))).intValue();
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74
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75 THROTTLE_PENDING_WRITES = ((Integer)
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76 ConfigurationFactory.getEntry("throttlePendingWrites",
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77 int.class,
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78 new Integer(Integer.MAX_VALUE))).intValue();
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79 THROTTLE_PAUSE = ((Long)
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80 ConfigurationFactory.getEntry("throttlePause",
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81 long.class,
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82 new Long(50))).longValue();
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83 } catch (ConfigurationException aCE) {
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84 }
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85 }
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86
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87 private static WriteDaemon theDaemon = new WriteDaemon();
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88
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89 private int thePendingCount;
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90 private LinkedQueue thePendingUpdates = new LinkedQueue();
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91
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92 private LinkedQueue theAsyncUpdates;
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93 private PooledExecutor theWriters;
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94
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95 private LinkedQueue theCompletions;
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96 private PooledExecutor theCompleters;
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97
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98 private IOStats theIOStats = new IOStats();
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99
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100 private long theStatId = StatGenerator.UNSET_ID;
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101 private int theThrottleCount = 0;
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102
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103 private WriteDaemon() {
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104 theAsyncUpdates = new LinkedQueue();
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105 theCompletions = new LinkedQueue();
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106
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107 theWriters = new PooledExecutor(theAsyncUpdates, MAX_WRITE_THREADS);
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108 theCompleters = new PooledExecutor(theCompletions, 1);
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109
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110 theLogger.log(Level.INFO, "Async keepalive: " + THREAD_KEEPALIVE);
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111 theLogger.log(Level.INFO, "Pending write size: " +
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112 DESIRED_PENDING_WRITES);
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113 theLogger.log(Level.INFO, "Throttle write size: " +
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114 THROTTLE_PENDING_WRITES);
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115 theLogger.log(Level.INFO, "Throttle pause: " +
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116 THROTTLE_PAUSE);
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117
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118 theWriters.setKeepAliveTime(THREAD_KEEPALIVE);
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119 theCompleters.setKeepAliveTime(THREAD_KEEPALIVE);
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120
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121 StatsBoard.get().add(this);
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122 }
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123
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124 public static WriteDaemon get() {
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125 return theDaemon;
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126 }
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127
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128 /**
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129 Queue a task for execution by the WriteDaemon thread.
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130 */
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diff changeset
131 public void queue(Runnable anUpdate) {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
132
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Dan Creswell <dan.creswell@gmail.com>
parents:
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133 // If the write queue is getting too large, start stalling
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parents:
diff changeset
134 if (theIOStats.getQueueSize() > THROTTLE_PENDING_WRITES) {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
135 ++theThrottleCount;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
136
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
137 theLogger.log(Level.WARNING,
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
138 "Write queue overflowing - THROTTLING");
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
139
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
140 try {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
141 Thread.sleep(THROTTLE_PAUSE);
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
142 } catch (InterruptedException anIE) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
143 theLogger.log(Level.SEVERE, "Throttle broken!");
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Dan Creswell <dan.creswell@gmail.com>
parents:
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144 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
145 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
146
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
147 synchronized(this) {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
148 try {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
149 thePendingUpdates.put(new OutputTracker(anUpdate));
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
150 ++thePendingCount;
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
151
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
152 if (thePendingCount >= DESIRED_PENDING_WRITES) {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
153 pushImpl();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
154 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
155 } catch (InterruptedException anIE) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
156 theLogger.log(Level.SEVERE, "Failed to queue update", anIE);
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Dan Creswell <dan.creswell@gmail.com>
parents:
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157 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
158 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
159
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
160 theIOStats.incAsyncInCount();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
161 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
162
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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163 /**
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
164 Should only be called from within a sync block.
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
165 */
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
166 private void pushImpl() {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
167 Object myTask;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
168
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
169 try {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
170 while ((myTask = thePendingUpdates.poll(0)) != null) {
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Dan Creswell <dan.creswell@gmail.com>
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171 theWriters.execute((Runnable) myTask);
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
172 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
173 } catch (InterruptedException anIE) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
174 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
175
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
176 thePendingCount = 0;
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
177 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
178
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
179 /**
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
180 Force the queue to be processed
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
181 */
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
182 void push() {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
183 synchronized(this) {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
184 pushImpl();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
185 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
186 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
187
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
188 /**
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
189 <p>Force the updates in the queue to disk. On completion, invoke the
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
190 passed task. Note this task is processed asynchronously outside
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
191 of the WriteDaemon thread. This allows the WriteDaemon to continue
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
192 processing updates whilst the completion task runs.</p>
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
193
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
194 <p>If you want a task to be performed synchronously by the WriteDaemon
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
195 after other requests, <code>queue</code> the task and invoke
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
196 <code>push</code>.</p>
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
197 */
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
198 void push(Task aCompletionTask) {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
199 if (aCompletionTask == null)
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
200 throw new IllegalArgumentException();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
201 else {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
202 synchronized(this) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
203 /*
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
204 We ensure the passed task doesn't execute until the
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
205 queue has been emptied by putting a barrier task at the end
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
206 of the queue. Thus, when we force the queue, this barrier
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
207 will only execute once all preceeding updates have been
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
208 performed.
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
209 */
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
210 queue(new Scheduler(aCompletionTask));
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
211 pushImpl();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
212 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
213 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
214 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
215
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
216 void halt() {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
217 theLogger.log(Level.INFO, "WriteDaemon doing halt");
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
218 theWriters.shutdownAfterProcessingCurrentlyQueuedTasks();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
219 theCompleters.shutdownAfterProcessingCurrentlyQueuedTasks();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
220 theLogger.log(Level.INFO, "WriteDaemon done halt");
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
221 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
222
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
223 /**
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
224 We do not run the completion task in-line. This is potentially time
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
225 consuming and we have more important things to do (write updates) so
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
226 we palm the completion task off to a separate thread pool when we've
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
227 done the necessary work.
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
228 */
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
229 private class Scheduler implements Runnable {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
230 private Task theTask;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
231
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
232 Scheduler(Task aCompletionTask) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
233 theTask = aCompletionTask;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
234 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
235
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
236 public void run() {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
237 try {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
238 theCompleters.execute(theTask);
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
239 } catch (InterruptedException anIE) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
240 theLogger.log(Level.SEVERE, "Failed to scheduler sync completion task", anIE);
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
241 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
242 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
243 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
244
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
245 private class OutputTracker implements Runnable {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
246 private Runnable theWrite;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
247
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
248 OutputTracker(Runnable aRunnable) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
249 theWrite = aRunnable;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
250 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
251
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
252 public void run() {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
253 theWrite.run();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
254
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
255 theIOStats.incAsyncOutCount();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
256 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
257 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
258
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
259 /**
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
260 @return the id of the StatGenerator that produced the stat
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
261 AdministrableStat.UNSET_ID if the id has never been set
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
262 */
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
263 public long getId() {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
264 return theStatId;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
265 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
266
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
267 public void setId(long anId) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
268 theStatId = anId;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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269 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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270
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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271 public Stat generate() {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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272 return new IOStat(theStatId, theIOStats.getTimePerIn(),
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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273 theIOStats.getTimePerOut(), theIOStats.getInOutRatio(),
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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274 theIOStats.getQueueSize(), theThrottleCount);
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parents:
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275 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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276 }