annotate src/org/eclipse/jetty/server/AsyncNCSARequestLog.java @ 803:166b16bda630

remove org.eclipse.jetty.util.preventers
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 07 Sep 2016 21:21:32 -0600
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children 8e9db0bbf4f9
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1 //
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2 // ========================================================================
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
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4 // ------------------------------------------------------------------------
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5 // All rights reserved. This program and the accompanying materials
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6 // are made available under the terms of the Eclipse Public License v1.0
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7 // and Apache License v2.0 which accompanies this distribution.
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8 //
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9 // The Eclipse Public License is available at
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10 // http://www.eclipse.org/legal/epl-v10.html
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11 //
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12 // The Apache License v2.0 is available at
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13 // http://www.opensource.org/licenses/apache2.0.php
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14 //
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15 // You may elect to redistribute this code under either of these licenses.
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16 // ========================================================================
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17 //
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18
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19 package org.eclipse.jetty.server;
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20
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21 import org.eclipse.jetty.util.BlockingArrayQueue;
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22 import org.eclipse.jetty.util.log.Log;
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23 import org.eclipse.jetty.util.log.Logger;
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24
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25 import java.io.IOException;
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26 import java.util.concurrent.BlockingQueue;
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27 import java.util.concurrent.LinkedBlockingQueue;
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28 import java.util.concurrent.TimeUnit;
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29
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30
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31 /* ------------------------------------------------------------ */
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32 /**
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33 * An asynchronously writing NCSA Request Log
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34 */
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35 public class AsyncNCSARequestLog extends NCSARequestLog
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36 {
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37 private static final Logger LOG = Log.getLogger(AsyncNCSARequestLog.class);
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38 private final BlockingQueue<String> _queue;
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39 private transient WriterThread _thread;
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40 private boolean _warnedFull;
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41
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42 public AsyncNCSARequestLog()
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43 {
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44 this(null,null);
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45 }
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46
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47 public AsyncNCSARequestLog(BlockingQueue<String> queue)
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48 {
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49 this(null,queue);
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50 }
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51
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52 public AsyncNCSARequestLog(String filename)
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53 {
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54 this(filename,null);
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55 }
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56
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57 public AsyncNCSARequestLog(String filename,BlockingQueue<String> queue)
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58 {
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59 super(filename);
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60 if (queue==null)
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61 queue=new BlockingArrayQueue<String>(1024);
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62 _queue=queue;
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63 }
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64
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65 private class WriterThread extends Thread
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66 {
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67 WriterThread()
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68 {
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69 setName("AsyncNCSARequestLog@"+Integer.toString(AsyncNCSARequestLog.this.hashCode(),16));
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70 }
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71
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72 @Override
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73 public void run()
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74 {
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75 while (isRunning())
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76 {
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77 try
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78 {
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79 String log = _queue.poll(10,TimeUnit.SECONDS);
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80 if (log!=null)
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81 AsyncNCSARequestLog.super.write(log);
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82
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83 while(!_queue.isEmpty())
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84 {
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85 log=_queue.poll();
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86 if (log!=null)
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87 AsyncNCSARequestLog.super.write(log);
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88 }
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89 }
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90 catch (IOException e)
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91 {
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92 LOG.warn(e);
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93 }
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94 catch (InterruptedException e)
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95 {
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96 LOG.ignore(e);
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97 }
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98 }
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99 }
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100 }
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101
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102 @Override
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103 protected synchronized void doStart() throws Exception
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104 {
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105 super.doStart();
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106 _thread = new WriterThread();
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107 _thread.start();
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108 }
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109
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110 @Override
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111 protected void doStop() throws Exception
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112 {
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113 _thread.interrupt();
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114 _thread.join();
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115 super.doStop();
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116 _thread=null;
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117 }
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118
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119 @Override
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120 protected void write(String log) throws IOException
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121 {
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122 if (!_queue.offer(log))
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123 {
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124 if (_warnedFull)
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125 LOG.warn("Log Queue overflow");
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126 _warnedFull=true;
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127 }
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128 }
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129
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130 }