asked on

Help understanding the following statement: MSMQ_.PeekCompleted += new PeekCompletedEventHandler(MSMQ__PeekCompleted)

Greetings:

I'm trying to debug some code that uses the class 'MessageQueue'

The program fails on this line:

MSMQ_.PeekCompleted += new PeekCompletedEventHandler(MSMQ__PeekCompleted);

...and the method looks like this:

protected void MSMQ__PeekCompleted(object sender, PeekCompletedEventArgs e)
{
((MessageQueue)sender).EndPeek(e.AsyncResult); // ********* LINE 114 ************
Message m = ((MessageQueue)sender).Receive();
this.Fire(m.Label, m.Body.ToString());
MainLoop();
}

Hoping to get help understanding what is being done so I can understand why the procedure times out. The error message I get is:

System.Messaging.MessageQueueException was unhandled by user code
Message="Timeout for the requested operation has expired."
Source="System.Messaging"
ErrorCode=-2147467259
StackTrace:
at System.Messaging.MessageQueue.AsynchronousRequest.End()
at ProjectObjects.Module1.CCMSMQ.MSMQ__PeekCompleted(Object sender, PeekCompletedEventArgs e) in C:\Projects\ProjectObjects\Module1\CCMSMQ.cs:line 114
at System.Messaging.MessageQueue.AsynchronousRequest.RaiseCompletionEvent(Int32 result, NativeOverlapped* overlappedPointer)

Thanks!

ASKER CERTIFIED SOLUTION

silemone

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silemone

the reason for me placing errMessage is that when debugging, you can see value of exception there also...or you can print to a file called ErrorLog.Text that you can create ...i.e..

if (! errMess.Equals(String.Empty)
{
//create or append to error file
}

John500

ASKER

The message didn't change much but here is the additional info:

System.Messaging.Message End()
System.Collections.ListDictionaryInternal
Exception raised by MyDomain\John500 / from : SYSTEMXYZ / Version : 123

I used the existing notification routine which made it look like this:

catch (System.Messaging.MessageQueueException exe)
{
NotifException.NotifExcep(exe, NotifyObjects.Notify, "MSMQ - Thread");
return;
}

NotifException.NotifExcep(......)
{
....
MailMessage mail = new MailMessage();
mail.To.Add("OrgNotification" + OrgEmail.InternalDomain);
mail.From = new MailAddress("Account Organization<OrgUserAcc" + OrgEmail.InternalDomain + '>');
mail.Subject = "[MSMQ Excep][" + System.Environment.MachineName + "][" + user + "] - " + info;
      if (except != null)
      {
      mail.Body = except.Message + "\r\n\r\n";
            mail.Body += except.Source + " -- " + except.GetType().AssemblyQualifiedName + "\r\n\r\n";
      mail.Body += except.StackTrace + "\r\n\r\n";
      mail.Body += except.TargetSite + "\r\n\r\n";
      mail.Body += except.Data;
      }
mail.Body += "\r\n\r\nException raised by " + user + " / from : " + System.Environment.MachineName + " / Version : " + App.Version;
mail.Body += "\r\n\r\nMore info: [" + info + "]";
mail.IsBodyHtml = false;
OrgEmail.SendMail(mail);

if (EvtWindowsEvent)
      SaveExceptionInEvt(except, user, info);
...
}

Any thoughts now about why this routine is timing out?

Thanks

John500

ASKER

I don't know what it was that corrected itself but I'm not getting this error any longer.

Thanks for input while it lasted.

If you get the chance please check out this question:

https://www.experts-exchange.com/questions/23835057/Understanding-the-Computer-Management-Message-Queuing-interface.html