00001 /******************************************************************************* 00002 00003 @file Layout.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 00027 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 00028 00029 00030 @version Initial version, May 2004 00031 @author Kris 00032 00033 00034 *******************************************************************************/ 00035 00036 module mango.log.Layout; 00037 00038 private import mango.log.Event; 00039 00040 /******************************************************************************* 00041 00042 Base class for all Layout instances 00043 00044 *******************************************************************************/ 00045 00046 public class Layout 00047 { 00048 private import mango.log.Logger; 00049 00050 /*********************************************************************** 00051 00052 Subclasses should implement this method to perform the 00053 actual message formatting. 00054 00055 ***********************************************************************/ 00056 00057 abstract char[] format (Event event); 00058 00059 /*********************************************************************** 00060 00061 Return a text string representing the event level. 00062 00063 ***********************************************************************/ 00064 00065 protected final char[] levelString (Event event) 00066 { 00067 return Logger.LevelNames[event.getLevel]; 00068 } 00069 } 00070 00071 00072 /******************************************************************************* 00073 00074 A simple layout comprised only of level, name, and message 00075 00076 *******************************************************************************/ 00077 00078 public class SimpleLayout : Layout 00079 { 00080 static protected SimpleLayout simpleLayout; 00081 00082 /*********************************************************************** 00083 00084 Make one of these available for use as the default layout 00085 00086 ***********************************************************************/ 00087 00088 static this () 00089 { 00090 simpleLayout = new SimpleLayout(); 00091 } 00092 00093 /*********************************************************************** 00094 00095 Format outgoing message 00096 00097 ***********************************************************************/ 00098 00099 char[] format (Event event) 00100 { 00101 return levelString (event) ~ event.getName() ~ " - " ~ event.toString(); 00102 } 00103 } 00104 00105 /******************************************************************************* 00106 00107 A simple layout comprised only of time(ms), level, name, and message 00108 00109 *******************************************************************************/ 00110 00111 public class SimpleTimerLayout : Layout 00112 { 00113 /*********************************************************************** 00114 00115 Convert a time value (in milliseconds) to ascii 00116 00117 ***********************************************************************/ 00118 00119 final char[] ultoa (char[] s, ulong l) 00120 in { 00121 assert (s.length > 0); 00122 } 00123 body 00124 { 00125 int len = s.length; 00126 do { 00127 s[--len] = l % 10 + '0'; 00128 l /= 10; 00129 } while (l && len); 00130 return s[len..s.length]; 00131 } 00132 00133 /*********************************************************************** 00134 00135 Format outgoing message 00136 00137 ***********************************************************************/ 00138 00139 char[] format (Event event) 00140 { 00141 char[20] time; 00142 00143 return ultoa(time, event.getTime) ~ " " ~ levelString (event) ~ event.getName() ~ " - " ~ event.toString(); 00144 } 00145 }