protected override object PreProcess(object message, out object data)
{
const string method = "PreProcess";
Debug.Assert(_messageHandler != null, "_messageHandler != null");
if (message == null)
{
throw new NullParameterException(GetType(), method, "message");
}
// The message should be a Stream containing an EventMessage - deserialize it.
var stream = message as Stream;
if (stream == null)
{
throw new InvalidParameterTypeException(GetType(), method, "message", typeof(Stream), message);
}
var eventMessage = new EventMessage();
eventMessage.Read(new BinaryReader(stream));
// Send it to the message handler.
_messageHandler.HandleEventMessage(eventMessage);
data = null;
return(message);
}
private static int GetEventMessages(EventMessages eventMessages, System.Messaging.Message message)
{
Debug.Assert(message != null, "message != null");
var reader = new BinaryReader(message.BodyStream);
switch (message.Label)
{
case Constants.MessageComponents.Msmq.MessageLabel:
// A single message.
var newEventMessage = new EventMessage();
newEventMessage.Read(reader);
eventMessages.Add(newEventMessage);
return(1);
case Constants.MessageComponents.Msmq.MessagesLabel:
// Multiple messages.
var newEventMessages = new EventMessages();
newEventMessages.Read(reader);
foreach (EventMessage eventMessage in newEventMessages)
{
eventMessages.Add(eventMessage);
}
return(newEventMessages.Count);
default:
Debug.WriteLine("Unexpected MSMQ message label '" + message.Label
+ "' - not recognised as a LinkMe Instrumentation message.");
return(0);
}
}
