private bool CanProcess(MultiPartMessage msg)
{
VocollectSession session = SessionManager.Instance[msg.Properties.ReadAsString("SerialNumber")];
/* Safe guard to ensure reset of session after new logon */
if ((session != null) && (msg.Properties.ReadAsString("MessageType") == "PrTaskLUTCoreConfiguration"))
{
SessionManager.Instance.DestroySession(msg.Properties.ReadAsString("SerialNumber"));
session.Dispose();
session = null;
}
TcpAdapterEndPoint endPoint = MessageEngine.Instance.AdapterProxy.ResolveUriToEndPoint((Uri)msg.Metadata.Read("ReceiveUri")) as TcpAdapterEndPoint;
if ((session != null) && (endPoint != null))
{
try
{
if (!session.AcquireLock(Configuration.ReadAsInt("PendingOperationsTimeout")))
{
/* Thread timed out or aborted due to a newer request */
if ((MessageEngine.Instance.Tracing.Switch.Level & SourceLevels.Warning) == SourceLevels.Warning)
{
MessageEngine.Instance.Tracing.TraceEvent(TraceEventType.Warning, 0, "Thread timed out waiting for a pending operation to complete.");
}
return(false);
}
}
catch (ObjectDisposedException)
{
return(false);
}
lock (endPointDictionary)
{
endPointDictionary.Add(endPoint, session);
}
if (IsDuplicate(msg, session, endPoint))
{
/* Message is duplicate, retransmit last response */
if ((MessageEngine.Instance.Tracing.Switch.Level & SourceLevels.Warning) == SourceLevels.Warning)
{
MessageEngine.Instance.Tracing.TraceEvent(TraceEventType.Warning, 0, "Message timeout detected, retransmitting last response.");
}
MultiPartMessage retransmitMsg = session.LastResponseMessage;
retransmitMsg.Metadata.Write("Loopback", false);
retransmitMsg.Metadata.Write("SendUri", msg.Metadata.Read("ReceiveUri"));
MessageEngine.Instance.TransmitMessage(retransmitMsg);
return(false);
}
else
{
/* Message is valid, continue processing */
session.LastRequestMessage = msg;
session.LastResponseMessage = null;
}
}
return(true);
}
