/// <summary>
/// Asynchronous thread which waits for the completion of the specified initiated input message interceptor.
/// </summary>
/// <param name="messageInterceptor">The message interceptor to wait for.</param>
private void WaitForInitiateInputMessage(object messageInterceptor)
{
try
{
using (var interceptor = messageInterceptor as MessageInterceptor)
{
interceptor.Wait();
_messageDispatcher.RemoveInterceptor(interceptor);
var inputMessage = (InitiateInputMessage)interceptor.Message;
if (inputMessage != null)
{
lock (_syncLock)
{
if (inputMessage.Article != null)
{
_inputArticles = inputMessage.Article;
}
if (Enum.TryParse <InitiateInputRequestState>(inputMessage.Details.Status, out _currentState) == false)
{
_currentState = InitiateInputRequestState.Unknown;
}
}
}
else
{
this.Error("Waiting for the message 'InitiateInputMessage' failed.");
lock (_syncLock)
{
_currentState = InitiateInputRequestState.Unknown;
}
}
if (this.Finished != null)
{
this.Trace("Raising event 'Finished'.");
this.Finished(this, new EventArgs());
}
}
}
catch (Exception ex)
{
this.Error("Receiving and processing 'InitiateInputMessage' failed!", ex);
}
}
/// <summary>
/// Initiates the input process by sending the according request to the storage system.
/// </summary>
void IInitiateInputRequest.Start()
{
lock (_syncLock)
{
if (_currentState != InitiateInputRequestState.Created)
{
return;
}
}
var request = new InitiateInputRequestEnvelope()
{
InitiateInputRequest = this
};
var initiateInputMessageInterceptor = new MessageInterceptor(this.Id, typeof(InitiateInputMessage));
_messageDispatcher.AddInterceptor(initiateInputMessageInterceptor);
var response = (InitiateInputResponse)_messageDispatcher.SendAndWaitForResponse(request,
this.Id,
typeof(InitiateInputResponse));
if (response == null)
{
_messageDispatcher.RemoveInterceptor(initiateInputMessageInterceptor);
initiateInputMessageInterceptor.Dispose();
throw new ArgumentException("Waiting for the message 'InitiateInputResponse' failed.");
}
if ((response.Details == null) ||
(Enum.TryParse <InitiateInputRequestState>(response.Details.Status, out _currentState) == false))
{
_currentState = InitiateInputRequestState.Unknown;
}
if (_currentState != InitiateInputRequestState.Accepted)
{
if (this.Finished != null)
{
this.Trace("Raising event 'Finished'.");
this.Finished(this, new EventArgs());
}
}
else
{
this.Details.InputPoint = (response.Details != null) ? response.Details.InputPoint : "0";
if (response.Article != null)
{
lock (_syncLock)
{
_inputArticles.AddRange(response.Article);
}
}
// wait for completion
if (ThreadPool.QueueUserWorkItem(new WaitCallback(WaitForInitiateInputMessage),
initiateInputMessageInterceptor) == false)
{
throw new ApplicationException("Starting observation thread failed.");
}
}
}