00001 /******************************************************************************* 00002 00003 @file RollingFileAppender.d 00004 00005 Copyright (c) 2004 Kris Bell 00006 00007 This software is provided 'as-is', without any express or implied 00008 warranty. In no event will the authors be held liable for damages 00009 of any kind arising from the use of this software. 00010 00011 Permission is hereby granted to anyone to use this software for any 00012 purpose, including commercial applications, and to alter it and/or 00013 redistribute it freely, subject to the following restrictions: 00014 00015 1. The origin of this software must not be misrepresented; you must 00016 not claim that you wrote the original software. If you use this 00017 software in a product, an acknowledgment within documentation of 00018 said product would be appreciated but is not required. 00019 00020 2. Altered source versions must be plainly marked as such, and must 00021 not be misrepresented as being the original software. 00022 00023 3. This notice may not be removed or altered from any distribution 00024 of the source. 00025 00026 4. Derivative works are permitted, but they must carry this notice 00027 in full and credit the original source. 00028 00029 00030 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 00031 00032 00033 @version Initial version, May 2004 00034 @author Kris 00035 00036 00037 *******************************************************************************/ 00038 00039 module mango.log.RollingFileAppender; 00040 00041 version (Isolated){} 00042 else 00043 { 00044 private import mango.log.Appender, 00045 mango.log.FileAppender; 00046 00047 private import mango.io.FilePath, 00048 mango.io.FileConst, 00049 mango.io.FileConduit, 00050 mango.io.DisplayWriter; 00051 00052 /******************************************************************************* 00053 00054 Append log messages to a file set. 00055 00056 *******************************************************************************/ 00057 00058 public class RollingFileAppender : FileAppender 00059 { 00060 private static uint mask; 00061 private FilePath[] paths; 00062 private int index; 00063 private IBuffer buffer; 00064 private ulong maxSize, 00065 fileSize; 00066 00067 /*********************************************************************** 00068 00069 Get a unique fingerprint for this class 00070 00071 ***********************************************************************/ 00072 00073 static this() 00074 { 00075 mask = nextMask(); 00076 } 00077 00078 /*********************************************************************** 00079 00080 Create a basic RollingFileAppender to a file-set with the 00081 specified path. 00082 00083 ***********************************************************************/ 00084 00085 this (FilePath p, int count, ulong maxSize) 00086 in { 00087 assert (count > 1 && count < 10); 00088 assert (p); 00089 } 00090 body 00091 { 00092 char[1] x; 00093 for (int i=0; i < count; ++i) 00094 { 00095 x[0] = '0' + i; 00096 00097 MutableFilePath clone = new MutableFilePath (p); 00098 clone.setName (clone.getName ~ x); 00099 paths ~= clone; 00100 } 00101 00102 this.maxSize = maxSize; 00103 index = -1; 00104 nextFile (); 00105 } 00106 00107 /*********************************************************************** 00108 00109 Create a basic RollingFileAppender to a file-set with the 00110 specified path, and with the given Layout 00111 00112 ***********************************************************************/ 00113 00114 this (FilePath p, int count, ulong maxSize, Layout layout) 00115 { 00116 this (p, count, maxSize); 00117 setLayout (layout); 00118 } 00119 00120 /*********************************************************************** 00121 00122 Return the fingerprint for this class 00123 00124 ***********************************************************************/ 00125 00126 uint getMask () 00127 { 00128 return mask; 00129 } 00130 00131 /*********************************************************************** 00132 00133 Return the name of this class 00134 00135 ***********************************************************************/ 00136 00137 char[] getName () 00138 { 00139 return this.classinfo.name; 00140 } 00141 00142 /*********************************************************************** 00143 00144 Append an event to the output. 00145 00146 ***********************************************************************/ 00147 00148 synchronized void append (Event event) 00149 { 00150 char[] msg; 00151 00152 // file already full? 00153 if (fileSize >= maxSize) 00154 nextFile (); 00155 00156 // bump file size 00157 fileSize += FileConst.NewlineString.length; 00158 00159 // writer log message and flush it 00160 Layout layout = getLayout; 00161 msg = layout.header (event); 00162 fileSize += msg.length; 00163 buffer.append (msg); 00164 00165 msg = layout.content (event); 00166 fileSize += msg.length; 00167 buffer.append (msg); 00168 00169 msg = layout.footer (event); 00170 fileSize += msg.length; 00171 buffer.append (msg); 00172 00173 buffer.append(FileConst.NewlineString).flush(); 00174 } 00175 00176 /*********************************************************************** 00177 00178 Switch to the next file within the set 00179 00180 ***********************************************************************/ 00181 00182 private void nextFile () 00183 { 00184 // select next file in the set 00185 if (++index >= paths.length) 00186 index = 0; 00187 00188 // reset file size 00189 fileSize = 0; 00190 00191 // close any existing conduit 00192 close (); 00193 00194 // open file; get writer 00195 buffer = setConduit (new FileConduit (paths[index], FileStyle.WriteAppending)); 00196 } 00197 } 00198 }