public string BeginPolling(ICallback callback,
string CorrelationID,
string Class,
bool UsesTestGateway,
string GovTalkUrl,
int PollingIntervalWholeSeconds)
{
string RetVal;
// HACK: Temp just call back the response if the correlation ID is "-999"
if (CorrelationID == "-999")
{
callback.Response("This is a test call back from the FBI COM Object 8.8.1.2");
return("Test call back was performed");
}
else
{
try
{
RetVal = _broker.BeginPolling(callback,
CorrelationID,
Class,
UsesTestGateway,
GovTalkUrl, PollingIntervalWholeSeconds);
}
catch (Exception ex)
{
throw (ex);
}
return(RetVal);
}
}
/// <summary>
/// Provides the meat of the polling mechanism.
/// </summary>
internal static void RunPollingThread(object Parameters)
{
try
{
// Prepare the thread for execution
ICallback callback = ((ThreadParam)Parameters).callback;
GatewayDocument gwDoc = ((ThreadParam)Parameters).document;
if (callback == null)
{
// MAG Removing Event Log Stuff _eventLog.WriteEntry(string.Format("Callback is null"));
return;
}
int interval = ((ThreadParam)Parameters).IntervalSeconds;
// Make sure the thread is always running, occasionally sleeping
XmlDocument returnDoc;
bool threadRunning = true;
do
{
// Check for redirection information
foreach (PollingParameters param in _messages)
{
if (param.Guid == ((ThreadParam)Parameters).Guid)
{
// rather than using the Parameters paramerter, should we be using the param for the test,
// so the thread actually stops?
if (param.Url == "" && param.IntervalSeconds < 0)
{
threadRunning = false;
_messages.Remove(param);
return;
}
// Will redirect to the first message in the queue, then delete it
((ThreadParam)Parameters).document.Url = param.Url;
interval = ((ThreadParam)Parameters).IntervalSeconds;
_messages.Remove(param);
break;
}
}
// Poll...
returnDoc = GatewayServer.Poll(gwDoc);
if (returnDoc == null)
{
}
else
{
// A response has been received, so check the message for any redirection or poll interval changes, and
// implement those changes
XmlNodeList ResponseParams = returnDoc.GetElementsByTagName("ResponseEndPoint");
try
{
// Get the polling interval and set out internal timer, and the interval in the thread parameters
interval = Convert.ToInt32(ResponseParams[0].Attributes["PollInterval"].InnerText);
}
catch (Exception)
{
interval = 60; // the default
}
try
{
// Now redirect as well
((ThreadParam)Parameters).document.Url = ResponseParams[0].InnerText;
}
catch (Exception)
{
// Nothing to do leave it as it is
}
// Invoke the callback
callback.Response(returnDoc.InnerXml);
}
// Pause until the next polling period
Thread.Sleep(interval * 1000);
} while (threadRunning);
}
catch (Exception ex)
{
throw (ex);
}
}
