protected override void Read()
{
using (var reader = new StreamReader(_fileName))
{
// Similar to EventMessages.ReadOuterXml(), but send the messages to the handler as we
// read them.
var adaptor = new XmlReadAdaptor(new XmlTextReader(reader), Xml.Namespace);
if (adaptor.IsReadingElement(Xml.EventMessagesElement))
{
var messages = new EventMessages();
while (adaptor.ReadElement(Xml.EventMessageElement))
{
// Check the reader wait handles - should we stop or pause?
if (StopEvent.WaitOne(0, false))
{
return;
}
if (PauseEvent.WaitOne(0, false))
{
// Paused - wait for stop or continue.
var pauseHandles = new[] { StopEvent, ContinueEvent };
switch (WaitHandle.WaitAny(pauseHandles))
{
case 0:
return; // Stop.
case 1:
break; // Continue.
}
}
var message = new EventMessage();
message.ReadXml(adaptor.XmlReader);
adaptor.ReadEndElement();
// Send to the message handler, if we have enough.
messages.Add(message);
if (messages.Count == Constants.MessageComponents.EventFile.MessageReaderBatchSize)
{
HandleEventMessages(messages);
messages = new EventMessages();
}
}
// Send any remaining messages to the message handler.
if (messages.Count > 0)
{
HandleEventMessages(messages);
}
}
}
OnExistingMessagesRead(System.EventArgs.Empty);
}
