Why does Enterprise Library ExceptionPolicy.HandleException return true/false? RSS

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  vmhatup

  Member

  292 Points

  516 Posts

  Why does Enterprise Library ExceptionPolicy.HandleException return true/false?

  Dec 09, 2011 12:40 PM|LINK

  I've been googling this topic, and I have seen several examples, but I'm not sure how it works.

  Anyways, this is a portion of code:

  try
  {
     throw new Exception
        ("This is a test exception");
  }
  catch (Exception ex)
  {                
     bool rethrow = ExceptionPolicy.HandleException (ex, "BusinessLogicPolicy");                       
     if (rethrow)
     {
        throw;
     }
  }

  I understand the general concept, but I don't understand what's being checked that returns true or false...
  
  Why would this following line return true/false?  bool rethrow = ExceptionPolicy.HandleException (ex, "BusinessLogicPolicy"); 
  
  With two exception policies below, why would an ex return true for one but false for another one?
  
  

  <add name="BusinessLogicPolicy">
              <exceptionTypes>
                 <add name="All Exceptions" type="System.Exception, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
                    postHandlingAction="ThrowNewException">
                    <exceptionHandlers>
                       <add name="BusinessLogicLoggingHandler" type="Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.Logging.LoggingExceptionHandler, Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                          logCategory="General" eventId="100" severity="Error" title="Enterprise Library Exception Handling"
                          formatterType="Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.TextExceptionFormatter, Microsoft.Practices.EnterpriseLibrary.ExceptionHandling"
                          priority="0" />
                       <add name="BusinessLogicReplaceHandler" type="Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.ReplaceHandler, Microsoft.Practices.EnterpriseLibrary.ExceptionHandling, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                          exceptionMessage="An unknown error has occurred in Business Logic Layer while processing your request. Please contract Help Desk Support at X-XXX-XXX-XXXX with Error Token ID {handlingInstanceID}."
                          replaceExceptionType="Common.Helpers.ExceptionHandling.BusinessLogicException, Helpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
                    </exceptionHandlers>
                 </add>
              </exceptionTypes>
           </add>

          <add name="DataAccessPolicy">
              <exceptionTypes>
                 <add name="All Exceptions" type="System.Exception, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
                    postHandlingAction="ThrowNewException">
                    <exceptionHandlers>
                       <add name="DataAccessLoggingHandler" type="Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.Logging.LoggingExceptionHandler, Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                          logCategory="General" eventId="100" severity="Error" title="Enterprise Library Exception Handling"
                          formatterType="Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.TextExceptionFormatter, Microsoft.Practices.EnterpriseLibrary.ExceptionHandling"
                          priority="0" />
                       <add name="DataAccessReplaceHandler" type="Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.ReplaceHandler, Microsoft.Practices.EnterpriseLibrary.ExceptionHandling, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                          exceptionMessage="An unknown error has occurred in Data Access Layer while processing your request. Please contract Help Desk Support at X-XXX-XXX-XXXX with Error Token ID {handlingInstanceID}."
                          replaceExceptionType="Common.Helpers.ExceptionHandling.DataAccessException, Helpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
                    </exceptionHandlers>
                 </add>
              </exceptionTypes>
           </add>
  

  enterprise handlers library csharp exception

  • Moved by mbanavige on Dec 09, 2011 02:08 PM
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  auschucky

  Member

  526 Points

  137 Posts

  Re: Why does Enterprise Library ExceptionPolicy.HandleException return true/false?

  Feb 22, 2012 12:48 AM|LINK

  As far as I know it would be the postHandlingAction="ThrowNewException" which determines if true or false is returned

  
  Other options are "None" or "NotifyRethrow"