Mercurial > hg > blitz_stable
annotate src/com/go/trove/log/LogEventParsingWriter.java @ 8:fa7203ea1622
Remove some dead code (Dave Brosius)
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 23 May 2009 11:27:41 +0100 |
parents | 3dc0c5604566 |
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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 * LogEventParsingWriter 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 LogEventParsingWriter extends Writer { |
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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 CharArrayWriter mMessageBuffer; |
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74 private Thread mMessageThread; |
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75 |
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76 private Date mTimestamp; |
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77 |
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78 // Set to true upon reading a CR so that if the next character is a LF, |
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79 // it is consumed. This is how CRLF patterns are discovered. |
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80 private boolean mTrackLF; |
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81 |
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82 /** |
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83 * @param source Source object to create events with. |
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84 * @param type Type of events to create. |
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85 */ |
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86 public LogEventParsingWriter(Log source, int type) { |
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87 mListeners = new Vector(2); |
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88 mSource = source; |
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89 mType = type; |
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90 |
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91 mMessageBuffer = new CharArrayWriter(); |
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92 } |
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93 |
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94 /** |
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95 * @param source Source object to create events with. |
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96 * @param type Type of events to create. |
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97 * @param lock Synchronization lock. |
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98 */ |
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99 public LogEventParsingWriter(Log source, int type, Object lock) { |
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100 super(lock); |
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101 mListeners = new Vector(2); |
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102 mSource = source; |
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103 mType = type; |
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104 |
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105 mMessageBuffer = new CharArrayWriter(); |
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106 } |
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107 |
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108 public void addLogListener(LogListener listener) { |
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109 mListeners.addElement(listener); |
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110 } |
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111 |
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112 public void removeLogListener(LogListener listener) { |
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113 mListeners.removeElement(listener); |
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114 } |
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115 |
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116 private void flushLogEvent() { |
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117 synchronized (lock) { |
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118 if (mMessageThread == null) { |
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119 return; |
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120 } |
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121 |
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122 String message = mMessageBuffer.toString(); |
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123 |
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124 if (mMessageBuffer.size() > 10000) { |
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125 mMessageBuffer = new CharArrayWriter(); |
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126 } |
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127 else { |
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128 mMessageBuffer.reset(); |
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129 } |
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130 |
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131 LogEvent e; |
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132 if (mTimestamp == null) { |
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133 e = new LogEvent(mSource, mType, message, mMessageThread); |
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134 } |
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135 else { |
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136 e = new LogEvent(mSource, mType, message, mMessageThread, |
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137 mTimestamp); |
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138 mTimestamp = null; |
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139 } |
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140 |
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141 synchronized (mListeners) { |
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142 Enumeration group = mListeners.elements(); |
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143 while (group.hasMoreElements()) { |
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144 ((LogListener)group.nextElement()).logMessage(e); |
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145 } |
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146 } |
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147 } |
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148 } |
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149 |
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150 public void write(char[] array, int off, int len) throws IOException { |
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151 synchronized (lock) { |
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152 if (!isEnabled()) { |
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153 if (mMessageBuffer.size() > 0) { |
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154 flushLogEvent(); |
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155 } |
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156 return; |
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157 } |
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158 |
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159 Thread current = Thread.currentThread(); |
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160 if (current != mMessageThread) { |
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161 if (mMessageBuffer.size() > 0) { |
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162 flushLogEvent(); |
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163 } |
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164 mMessageThread = current; |
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165 } |
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166 |
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167 int writtenLength = 0; |
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168 |
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169 int i = 0; |
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170 for (i=0; i<len; i++) { |
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171 char c = array[i + off]; |
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172 if (c == '\r') { |
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173 mTrackLF = true; |
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174 writeToBuffer(array, writtenLength + off, |
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175 i - writtenLength); |
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176 // Add one more than i to skip the CR. |
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177 writtenLength = i + 1; |
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178 flushLogEvent(); |
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179 } |
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180 else if (c == '\n') { |
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181 if (mTrackLF) { |
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182 // Consume the LF of CRLF. |
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183 mTrackLF = false; |
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184 writtenLength++; |
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185 } |
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186 else { |
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187 writeToBuffer(array, writtenLength + off, |
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188 i - writtenLength); |
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189 // Add one more than i to skip the LF. |
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190 writtenLength = i + 1; |
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191 flushLogEvent(); |
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192 } |
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193 } |
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194 else { |
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195 mTrackLF = false; |
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196 } |
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197 } |
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198 |
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199 writeToBuffer(array, writtenLength + off, i - writtenLength); |
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200 } |
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201 } |
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202 |
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203 public void flush() throws IOException { |
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204 } |
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205 |
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206 public void close() throws IOException { |
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207 synchronized (lock) { |
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208 mMessageBuffer.close(); |
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209 } |
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210 } |
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211 |
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212 /** |
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213 * Returning false discards written data, and events are not generated. |
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214 * Default implementation always returns true. |
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215 */ |
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216 public boolean isEnabled() { |
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217 return true; |
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218 } |
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219 |
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220 private void writeToBuffer(char[] array, int off, int len) { |
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221 if (mMessageBuffer.size() == 0) { |
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222 mTimestamp = new Date(); |
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223 } |
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224 mMessageBuffer.write(array, off, len); |
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225 } |
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226 } |