Mercurial > hg > blitz_stable
annotate src/com/go/trove/log/LogEventParsingOutputStream.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 * 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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133 } |
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134 |
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135 if (mMessageBuffer.size() > 10000) { |
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136 mMessageBuffer = new ByteArrayOutputStream(); |
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137 } |
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138 else { |
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139 mMessageBuffer.reset(); |
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140 } |
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141 |
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142 LogEvent e; |
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143 |
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144 if (mTimestamp == null) { |
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145 e = new LogEvent(mSource, mType, message, mMessageThread); |
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146 } |
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147 else { |
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148 e = new LogEvent(mSource, mType, message, mMessageThread, |
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149 mTimestamp); |
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150 mTimestamp = null; |
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151 } |
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152 |
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153 synchronized (mListeners) { |
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154 Enumeration group = mListeners.elements(); |
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155 while (group.hasMoreElements()) { |
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156 ((LogListener)group.nextElement()).logMessage(e); |
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157 } |
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158 } |
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159 } |
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160 |
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161 public synchronized void write(int b) throws IOException { |
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162 mOneByte[0] = (byte)b; |
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163 write(mOneByte, 0, 1); |
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164 } |
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165 |
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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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168 |
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169 if (!isEnabled()) { |
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170 if (mMessageBuffer.size() > 0) { |
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171 flushLogEvent(); |
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172 } |
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173 return; |
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174 } |
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175 |
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176 Thread current = Thread.currentThread(); |
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177 if (current != mMessageThread) { |
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178 if (mMessageBuffer.size() > 0) { |
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179 flushLogEvent(); |
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180 } |
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181 mMessageThread = current; |
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182 } |
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183 |
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184 int writtenLength = 0; |
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185 |
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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]; |
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189 if (b == (byte)'\r') { |
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190 mTrackLF = true; |
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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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193 writtenLength = i + 1; |
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194 flushLogEvent(); |
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195 } |
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196 else if (b == (byte)'\n') { |
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197 if (mTrackLF) { |
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198 // Consume the LF of CRLF. |
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199 mTrackLF = false; |
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200 writtenLength++; |
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201 } |
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202 else { |
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203 writeToBuffer(array, writtenLength + off, |
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204 i - writtenLength); |
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205 // Add one more than i to skip the LF. |
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206 writtenLength = i + 1; |
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207 flushLogEvent(); |
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208 } |
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209 } |
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210 else { |
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211 mTrackLF = false; |
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212 } |
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213 } |
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214 |
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215 writeToBuffer(array, writtenLength + off, i - writtenLength); |
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216 } |
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217 |
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218 public synchronized void close() throws IOException { |
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219 mMessageBuffer.close(); |
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220 } |
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221 |
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222 /** |
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223 * Returning false discards written data, and events are not generated. |
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224 * Default implementation always returns true. |
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225 */ |
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226 public boolean isEnabled() { |
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227 return true; |
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228 } |
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229 |
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230 private void writeToBuffer(byte[] array, int off, int len) { |
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231 if (mMessageBuffer.size() == 0) { |
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232 mTimestamp = new Date(); |
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233 } |
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234 mMessageBuffer.write(array, off, len); |
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235 } |
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236 } |