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Layout.d

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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 }

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