Mercurial > hg > blitz_stable

annotate src/com/go/trove/log/LogEventParsingOutputStream.java @ 27:511648fa4d64 Version 2.1

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Version to 2.1
author Dan Creswell <dan.creswell@gmail.com>
date Mon, 04 Jan 2010 13:00:40 +0000
parents 3dc0c5604566
children
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1 /* ====================================================================
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2 * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group
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3 * ====================================================================
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4 * The Tea Software License, Version 1.1
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5 *
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6 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
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7 *
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions
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10 * are met:
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11 *
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12 * 1. Redistributions of source code must retain the above copyright
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13 * notice, this list of conditions and the following disclaimer.
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14 *
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15 * 2. Redistributions in binary form must reproduce the above copyright
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16 * notice, this list of conditions and the following disclaimer in
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17 * the documentation and/or other materials provided with the
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18 * distribution.
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19 *
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20 * 3. The end-user documentation included with the redistribution,
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21 * if any, must include the following acknowledgment:
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22 * "This product includes software developed by the
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23 * Walt Disney Internet Group (http://opensource.go.com/)."
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24 * Alternately, this acknowledgment may appear in the software itself,
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25 * if and wherever such third-party acknowledgments normally appear.
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26 *
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27 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
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28 * not be used to endorse or promote products derived from this
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29 * software without prior written permission. For written
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30 * permission, please contact opensource@dig.com.
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31 *
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32 * 5. Products derived from this software may not be called "Tea",
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33 * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
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34 * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
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35 * written permission of the Walt Disney Internet Group.
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36 *
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37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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40 * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS
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41 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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44 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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45 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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48 * ====================================================================
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49 *
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50 * For more information about Tea, please see http://opensource.go.com/.
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51 */
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52
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53 package com.go.trove.log;
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54
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55 import java.io.*;
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56 import java.util.*;
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57
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58 /******************************************************************************
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59 * LogEventParsingOutputStream parses the data written to it and converts it
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60 * to LogEvent objects. Add a LogListener to intercept LogEvents. Events are
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61 * parsed based on newline characters (LF, CRLF or CR) or a switch to a
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62 * different thread.
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63 *
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64 * @author Brian S O'Neill
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65 * @version
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66 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 9/07/00 <!-- $-->
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67 */
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68 public class LogEventParsingOutputStream extends OutputStream {
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69 private Vector mListeners;
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70 private Log mSource;
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71 private int mType;
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72
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73 private byte[] mOneByte = new byte[1];
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74
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75 private ByteArrayOutputStream mMessageBuffer;
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76 private String mEncoding;
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77 private Thread mMessageThread;
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78
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79 private Date mTimestamp;
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80
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81 // Set to true upon reading a CR so that if the next character is a LF,
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82 // it is consumed. This is how CRLF patterns are discovered.
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83 private boolean mTrackLF;
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84
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85 /**
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86 * @param source Source object to create events with.
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87 * @param type Type of events to create.
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88 */
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89 public LogEventParsingOutputStream(Log source, int type) {
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90 mListeners = new Vector(2);
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91 mSource = source;
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92 mType = type;
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93
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94 mMessageBuffer = new ByteArrayOutputStream();
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95 }
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96
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97 /**
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98 * @param source Source object to create events with.
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99 * @param type Type of events to create.
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100 * @param encoding Character encoding of bytes.
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101 */
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102 public LogEventParsingOutputStream(Log source, int type,
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103 String encoding) {
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104 mListeners = new Vector(2);
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105 mSource = source;
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106 mType = type;
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107
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108 mMessageBuffer = new ByteArrayOutputStream();
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109 mEncoding = encoding;
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110 }
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111
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112 public void addLogListener(LogListener listener) {
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113 mListeners.addElement(listener);
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114 }
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115
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116 public void removeLogListener(LogListener listener) {
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117 mListeners.removeElement(listener);
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118 }
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119
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120 private synchronized void flushLogEvent()
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121 throws UnsupportedEncodingException {
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122
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123 if (mMessageThread == null) {
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124 return;
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125 }
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126
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127 String message;
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128 if (mEncoding == null) {
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129 message = mMessageBuffer.toString();
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130 }
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131 else {
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132 message = mMessageBuffer.toString(mEncoding);
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Dan Creswell <dan.creswell@gmail.com>
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133 }
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Dan Creswell <dan.creswell@gmail.com>
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134
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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135 if (mMessageBuffer.size() > 10000) {
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136 mMessageBuffer = new ByteArrayOutputStream();
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Dan Creswell <dan.creswell@gmail.com>
parents:
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137 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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138 else {
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Dan Creswell <dan.creswell@gmail.com>
parents:
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139 mMessageBuffer.reset();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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140 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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141
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Dan Creswell <dan.creswell@gmail.com>
parents:
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142 LogEvent e;
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Dan Creswell <dan.creswell@gmail.com>
parents:
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143
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Dan Creswell <dan.creswell@gmail.com>
parents:
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144 if (mTimestamp == null) {
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Dan Creswell <dan.creswell@gmail.com>
parents:
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145 e = new LogEvent(mSource, mType, message, mMessageThread);
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Dan Creswell <dan.creswell@gmail.com>
parents:
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146 }
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Dan Creswell <dan.creswell@gmail.com>
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147 else {
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148 e = new LogEvent(mSource, mType, message, mMessageThread,
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Dan Creswell <dan.creswell@gmail.com>
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149 mTimestamp);
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Dan Creswell <dan.creswell@gmail.com>
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150 mTimestamp = null;
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Dan Creswell <dan.creswell@gmail.com>
parents:
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151 }
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Dan Creswell <dan.creswell@gmail.com>
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152
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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153 synchronized (mListeners) {
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Dan Creswell <dan.creswell@gmail.com>
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154 Enumeration group = mListeners.elements();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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155 while (group.hasMoreElements()) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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156 ((LogListener)group.nextElement()).logMessage(e);
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Dan Creswell <dan.creswell@gmail.com>
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157 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
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158 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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159 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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160
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Dan Creswell <dan.creswell@gmail.com>
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161 public synchronized void write(int b) throws IOException {
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Dan Creswell <dan.creswell@gmail.com>
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162 mOneByte[0] = (byte)b;
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163 write(mOneByte, 0, 1);
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Dan Creswell <dan.creswell@gmail.com>
parents:
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164 }
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Dan Creswell <dan.creswell@gmail.com>
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165
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Dan Creswell <dan.creswell@gmail.com>
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166 public synchronized void write(byte[] array, int off, int len)
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167 throws IOException {
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Dan Creswell <dan.creswell@gmail.com>
parents:
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168
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Dan Creswell <dan.creswell@gmail.com>
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169 if (!isEnabled()) {
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170 if (mMessageBuffer.size() > 0) {
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Dan Creswell <dan.creswell@gmail.com>
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171 flushLogEvent();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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172 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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173 return;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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174 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
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175
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Dan Creswell <dan.creswell@gmail.com>
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176 Thread current = Thread.currentThread();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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177 if (current != mMessageThread) {
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178 if (mMessageBuffer.size() > 0) {
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179 flushLogEvent();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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180 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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181 mMessageThread = current;
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Dan Creswell <dan.creswell@gmail.com>
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182 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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183
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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184 int writtenLength = 0;
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Dan Creswell <dan.creswell@gmail.com>
parents:
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185
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Dan Creswell <dan.creswell@gmail.com>
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186 int i = 0;
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187 for (i=0; i<len; i++) {
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188 byte b = array[i + off];
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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189 if (b == (byte)'\r') {
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Dan Creswell <dan.creswell@gmail.com>
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190 mTrackLF = true;
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Dan Creswell <dan.creswell@gmail.com>
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191 writeToBuffer(array, writtenLength + off, i - writtenLength);
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192 // Add one more than i to skip the CR.
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Dan Creswell <dan.creswell@gmail.com>
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193 writtenLength = i + 1;
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Dan Creswell <dan.creswell@gmail.com>
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194 flushLogEvent();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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195 }
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196 else if (b == (byte)'\n') {
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197 if (mTrackLF) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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198 // Consume the LF of CRLF.
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199 mTrackLF = false;
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200 writtenLength++;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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201 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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202 else {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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203 writeToBuffer(array, writtenLength + off,
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
204 i - writtenLength);
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
205 // Add one more than i to skip the LF.
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
206 writtenLength = i + 1;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
207 flushLogEvent();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
208 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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209 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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210 else {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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211 mTrackLF = false;
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Dan Creswell <dan.creswell@gmail.com>
parents:
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212 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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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 writeToBuffer(array, writtenLength + off, i - writtenLength);
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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216 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
217
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
218 public synchronized void close() throws IOException {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
219 mMessageBuffer.close();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
220 }
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 * Returning false discards written data, and events are not generated.
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
224 * Default implementation always returns true.
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
225 */
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
226 public boolean isEnabled() {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
227 return true;
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
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
230 private void writeToBuffer(byte[] array, int off, int len) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
231 if (mMessageBuffer.size() == 0) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
232 mTimestamp = new Date();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
233 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
234 mMessageBuffer.write(array, off, len);
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 }