MonoRail/Castle.MonoRail.Framework/Extensions/ExceptionChaining/EmailHandler.cs

   1 // Copyright 2004-2007 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.MonoRail.Framework.Extensions.ExceptionChaining
  16 {
  17         using System;
  18         using System.Configuration;
  19         using System.Xml;
  20
  21         using Castle.Components.Common.EmailSender;
  22
  23         /// <summary>
  24         /// A handle that sends the exception by email
  25         /// </summary>
  26         public class EmailHandler : AbstractExceptionHandler, IConfigurableHandler
  27         {
  28                 private String mailTo;
  29                 private String mailFrom = "donotreply@castleproject.org";
  30
  31                 /// <summary>
  32                 /// Implementors should check for known attributes and child nodes
  33                 /// within the <c>exceptionHandlerNode</c>
  34                 /// </summary>
  35                 /// <param name="exceptionHandlerNode">The Xml node
  36                 /// that represents this handler on the configuration file</param>
  37                 public void Configure(XmlNode exceptionHandlerNode)
  38                 {
  39                         XmlAttribute mailToAtt = exceptionHandlerNode.Attributes["mailTo"];
  40
  41                         if (mailToAtt == null || mailToAtt.Value == String.Empty)
  42                         {
  43                                 String message="'mailTo' is a required attribute " +
  44                                         "for EmailHandler (part of ExceptionChaining extension)";
  45                                 throw new ConfigurationErrorsException(message);
  46                         }
  47
  48                         mailTo = mailToAtt.Value;
  49
  50                         XmlAttribute mailFromAtt = exceptionHandlerNode.Attributes["mailFrom"];
  51
  52                         if (mailFromAtt != null && mailFromAtt.Value != String.Empty)
  53                         {
  54                                 mailFrom = mailFromAtt.Value;
  55                         }
  56                 }
  57
  58                 /// <summary>
  59                 /// Implementors should perform the action
  60                 /// on the exception. Note that the exception
  61                 /// is available in <see cref="IRailsEngineContext.LastException"/>
  62                 /// </summary>
  63                 /// <param name="context"></param>
  64                 public override void Process(IRailsEngineContext context)
  65                 {
  66                         IEmailSender emailSender = (IEmailSender) context.GetService( typeof(IEmailSender) );
  67
  68                         String message = BuildStandardMessage(context);
  69
  70                         try
  71                         {
  72                                 emailSender.Send( mailFrom, mailTo,
  73                                         "MonoRail Exception: " + context.LastException.GetType().Name, message );
  74                         }
  75                         catch(Exception)
  76                         {
  77                                 // We ignore errors during send
  78                         }
  79
  80                         InvokeNext(context);
  81                 }
  82         }
  83 }