class/System/System.Diagnostics/NullEventLog.cs

   1 //
   2 // NullEventLog.cs
   3 //
   4 // Author:
   5 //   Atsushi Enomoto  <atsushi@ximian.com>
   6 //   Gert Driesen  <drieseng@users.sourceforge.net>
   7 //
   8 // (C) 2006 Novell, Inc.
   9 //
  10
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System;
  33 using System.Diagnostics;
  34
  35 namespace System.Diagnostics
  36 {
  37         // Empty implementation that does not need any specific platform
  38         // but should be enough to get applications to run that WRITE to eventlog
  39         internal class NullEventLog : EventLogImpl
  40         {
  41                 public NullEventLog (EventLog coreEventLog)
  42                         : base (coreEventLog)
  43                 {
  44                 }
  45
  46                 public override void BeginInit ()
  47                 {
  48                 }
  49
  50                 public override void Clear ()
  51                 {
  52                 }
  53
  54                 public override void Close ()
  55                 {
  56                 }
  57
  58                 public override void CreateEventSource (EventSourceCreationData sourceData)
  59                 {
  60                 }
  61
  62                 public override void Delete (string logName, string machineName)
  63                 {
  64                 }
  65
  66                 public override void DeleteEventSource (string source, string machineName)
  67                 {
  68                 }
  69
  70                 public override void Dispose (bool disposing)
  71                 {
  72                 }
  73
  74                 public override void DisableNotification ()
  75                 {
  76                 }
  77
  78                 public override void EnableNotification ()
  79                 {
  80                 }
  81
  82                 public override void EndInit ()
  83                 {
  84                 }
  85
  86                 public override bool Exists (string logName, string machineName)
  87                 {
  88                         return true;
  89                 }
  90
  91                 protected override string FormatMessage (string source, uint messageID, string [] replacementStrings)
  92                 {
  93                         return string.Join (", ", replacementStrings);
  94                 }
  95
  96                 protected override int GetEntryCount ()
  97                 {
  98                         return 0;
  99                 }
 100
 101                 protected override EventLogEntry GetEntry (int index)
 102                 {
 103                         return null;
 104                 }
 105
 106                 protected override string GetLogDisplayName ()
 107                 {
 108                         return CoreEventLog.Log;
 109                 }
 110
 111                 protected override string [] GetLogNames (string machineName)
 112                 {
 113                         return new string [0];
 114                 }
 115
 116                 public override string LogNameFromSourceName (string source, string machineName)
 117                 {
 118                         return null;
 119                 }
 120
 121                 public override bool SourceExists (string source, string machineName)
 122                 {
 123                         return false;
 124                 }
 125
 126                 public override void WriteEntry (string [] replacementStrings, EventLogEntryType type, uint instanceID, short category, byte [] rawData)
 127                 {
 128                 }
 129
 130 #if NET_2_0
 131                 public override OverflowAction OverflowAction {
 132                         get { return OverflowAction.DoNotOverwrite; }
 133                 }
 134
 135                 public override int MinimumRetentionDays {
 136                         get { return int.MaxValue; }
 137                 }
 138
 139                 public override long MaximumKilobytes {
 140                         get { return long.MaxValue; }
 141                         set { throw new NotSupportedException ("This EventLog implementation does not support setting max kilobytes policy"); }
 142                 }
 143
 144                 public override void ModifyOverflowPolicy (OverflowAction action, int retentionDays)
 145                 {
 146                         throw new NotSupportedException ("This EventLog implementation does not support modifying overflow policy");
 147                 }
 148
 149                 public override void RegisterDisplayName (string resourceFile, long resourceId)
 150                 {
 151                         throw new NotSupportedException ("This EventLog implementation does not support registering display name");
 152                 }
 153 #endif
 154         }
 155 }