Enterprise Library Test Guide - Willy .Net

Testing the Application Block 29
Code test case Implemented? Feature that is implemented
Verify that the application
block uses WMI and the
event log to monitor errors
during caching operations
when WMI and the event log
are enabled.
Yes
For example, if an exception occurs when the
application block refreshes the cache, the
RefreshActionInvoker.InvokeRefreshAction
method handles the exception. This method
uses an instance of the CachingInstrumentationProvider
to notify WMI and the event log.
This is shown in the following code example.
public static void InvokeRefreshAction(…)
{
try
{
…
refreshActionData.InvokeOnThread-
PoolThread();
}
catch (Exception e)
{
instrumentationProvider.FireCache-
Failed(…);
}
}
The CachingInstrumentationProvider class
raises the cacheFailed event. The CacheFailed
method consumes the event and notifies WMI
and logs the exception to the event log. This is
shown in the following code example.
[InstrumentationConsumer("CacheFailed"
)]
public void CacheFailed(…)
{
if (WmiEnabled)
{
System.Management.Instrumentation.
Instrumentation.Fire(new CacheFailur
eEvent(instanceName, e.ErrorMessage,
e.Exception.ToString()));
}
if (EventLoggingEnabled)
{
…
EventLog.WriteEntry(GetEventSourceName(
), entryText, EventLogEntryType.Error);
}
}
continued