public void Initialize(Message rootMessage)
{
RootMessage = _messageFactory.MakeMessageViewModel(rootMessage);
RootMessage.LoadSender();
AllMessages.Add(RootMessage);
SelfIsSender = _sessionService.LoggedInUser.Id == rootMessage.SenderId;
}
/// <remarks>Used for fatal exception messages caugth by the LongPollingHandler</remarks>
internal LongPollingConnection(RootMessage message, HttpContext httpContext, AsyncCallback asyncCallback, object asyncState)
{
ASSERT( message != null, "Missing parameter 'message'" );
ASSERT( httpContext != null, "Missing parameter 'httpContext'" );
AsyncState = asyncState;
HttpContext = httpContext;
AsyncCallback = asyncCallback;
SendResponseMessageSynchroneously( message );
}
/// <remarks>Can only be called from LongPollingHandler</remarks>
internal void SendResponseMessageSynchroneously(RootMessage responseMessage)
{
CompletedSynchronously = true;
SendResponseMessage( responseMessage );
}
/// <remarks>
/// WARNING: Every calls to this method should be performed outside any lock()s because the call to "AsyncCallback(this)" will try to create a new thread.<br/>
/// Example dead-lock scenario:<br/>
/// Under heavy load, all worker threads are busy and they are all waiting for a lock() to liberate.<br/>
/// One of the worker thread is calling this method from inside of this lock().<br/>
/// This thread will try to create a new thread from the "AsyncCallback(this)".<br/>
/// The problem is that "AsyncCallback(this)" will then hang, waiting for a worker slot thread to liberate...
/// </remarks>
public void SendResponseMessage(RootMessage responseMessage)
{
ASSERT( responseMessage != null, "Missing parameter 'responseMessage'" );
LOG( "SendResponseMessage(" + responseMessage + ") - Start" );
try
{
ResponseMessage = responseMessage;
// Declare message as completed
int oldIsCompleted = Interlocked.Exchange( ref isCompleted, 1 );
if( oldIsCompleted != 0 )
throw new InvalidOperationException( GetType().FullName + "::" + System.Reflection.MethodInfo.GetCurrentMethod().Name + "() can only be called once" );
// Invoke callback that will invoke LongPollingHandler.EndProcessRequest()
LOG( "SendResponseMessage(" + responseMessage + ") - AsyncCallback is " + (AsyncCallback != null ? "not null" : "null") );
if( AsyncCallback != null )
AsyncCallback( this );
LOG( "SendResponseMessage(" + responseMessage + ") - Exit" );
}
catch( System.Exception ex )
{
LOG( "*** Error while terminating the HTTP request - Could not invoke the request's callback (" + ex.GetType().FullName + "): " + ex.Message );
}
}
