Util/ExceptionHandlingThread.cs

   1 //
   2 // ExceptionHandlingThread.cs
   3 //
   4 // Copyright (C) 2005 Novell, Inc.
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a
   9 // copy of this software and associated documentation files (the "Software"),
  10 // to deal in the Software without restriction, including without limitation
  11 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12 // and/or sell copies of the Software, and to permit persons to whom the
  13 // Software is furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24 // DEALINGS IN THE SOFTWARE.
  25 //
  26
  27 using System;
  28 using System.Collections;
  29 using System.Threading;
  30
  31 namespace Beagle.Util {
  32
  33         public class ExceptionHandlingThread {
  34
  35                 private static Hashtable live_threads = new Hashtable ();
  36                 private Thread thread;
  37                 private ThreadStart method;
  38
  39                 private ExceptionHandlingThread (ThreadStart method)
  40                 {
  41                         this.method = method;
  42                 }
  43
  44                 private void ThreadStarted ()
  45                 {
  46                         try {
  47                                 this.method ();
  48                         } catch (Exception e) {
  49                                 Logger.Log.Warn ("Exception caught while executing {0}:{1}",
  50                                                  this.method.Target, this.method.Method);
  51                                 Logger.Log.Warn (e);
  52                         }
  53
  54                         lock (live_threads)
  55                                 live_threads.Remove (this.thread);
  56                 }
  57
  58                 public static void Start (ThreadStart method)
  59                 {
  60                         ExceptionHandlingThread eht = new ExceptionHandlingThread (method);
  61
  62                         eht.thread = new Thread (new ThreadStart (eht.ThreadStarted));
  63
  64                         eht.thread.Name = String.Format ("ExceptionHandlingThread: {0}:{1}",
  65                                                          method.Target, method.Method);
  66
  67                         lock (live_threads)
  68                                 live_threads [eht.thread] = eht.thread.Name;
  69
  70                         eht.thread.Start ();
  71                 }
  72
  73                 public static void SpewLiveThreads ()
  74                 {
  75                         bool have_live_thread = false;
  76
  77                         lock (live_threads) {
  78                                 foreach (string str in live_threads.Values) {
  79                                         Logger.Log.Debug ("Live ExceptionHandlingThread: {0}", str);
  80                                         have_live_thread = true;
  81                                 }
  82                         }
  83
  84                         if (! have_live_thread)
  85                                 Logger.Log.Debug ("No live ExceptionHandlingThreads!");
  86                 }
  87         }
  88 }