private void SendProbe(IPAddress address, int port)
{
try
{
var uri = new UriBuilder("http", address.ToString(), port);
var probe = new MTConnectClients.Probe(uri.ToString());
probe.UserObject = new ProbeSender(address, port);
probe.Timeout = Timeout;
probe.Error += Probe_Error;
// Notify that a new Probe request has been sent
ProbeSent?.Invoke(this, address, port);
var document = probe.Execute();
if (document != null)
{
// Get the MAC Address of the sender
var macAddress = GetMacAddress(address);
foreach (var device in document.Devices)
{
// Notify that a Device was found
DeviceFound?.Invoke(this, new MTConnectDevice(address, port, macAddress, device.Name));
}
// Notify that the Probe reqeuest was successful
ProbeSuccessful?.Invoke(this, address, port);
}
}
catch { }
}
private void Worker(object obj)
{
long instanceId = -1;
bool initialize = true;
do
{
var probe = new Probe(BaseUrl, DeviceName);
probe.Timeout = Timeout;
probe.Error += MTConnectErrorRecieved;
probe.ConnectionError += ProcessConnectionError;
var probeDoc = probe.Execute();
if (probeDoc != null)
{
// Raise ProbeReceived Event
ProbeReceived?.Invoke(probeDoc);
do
{
var current = new Current(BaseUrl, DeviceName);
current.Timeout = Timeout;
current.Error += MTConnectErrorRecieved;
current.ConnectionError += ProcessConnectionError;
var currentDoc = current.Execute();
if (currentDoc != null)
{
// Check if FirstSequence is larger than previously Sampled
if (!initialize)
{
initialize = SampleRange.From > 0 && currentDoc.Header.FirstSequence > SampleRange.From;
}
if (initialize)
{
// Raise CurrentReceived Event
CurrentReceived?.Invoke(currentDoc);
// Check Assets
if (currentDoc.DeviceStreams.Count > 0)
{
var deviceStream = currentDoc.DeviceStreams.Find(o => o.Name == DeviceName);
if (deviceStream != null && deviceStream.DataItems != null)
{
CheckAssetChanged(deviceStream.DataItems);
}
}
}
// Check if Agent InstanceID has changed (Agent has been reset)
if (initialize || instanceId != currentDoc.Header.InstanceId)
{
SampleRange.Reset();
instanceId = currentDoc.Header.InstanceId;
// Restart entire request sequence if new Agent Instance Id is read (probe could have changed)
if (!initialize)
{
break;
}
}
long from;
if (initialize)
{
from = currentDoc.Header.NextSequence;
}
else
{
// If recovering from Error then use last Sample Range that was sampled successfully
// Try to get Buffer minus 100 (to account for time between current and sample requests)
from = currentDoc.Header.LastSequence - (currentDoc.Header.BufferSize - 100);
from = Math.Max(from, currentDoc.Header.FirstSequence);
from = Math.Max(SampleRange.From, from);
}
long to;
if (initialize)
{
to = from;
}
else
{
// Get up to the MaximumSampleCount
to = currentDoc.Header.NextSequence;
to = Math.Min(to, from + MaximumSampleCount);
}
// Set the SampleRange for subsequent samples
SampleRange.From = from;
SampleRange.To = to;
initialize = false;
// Create the Url to use for the Sample Stream
string url = CreateSampleUrl(BaseUrl, DeviceName, Interval, from, MaximumSampleCount);
// Create and Start the Sample Stream
if (sampleStream != null)
{
sampleStream.Stop();
}
sampleStream = new Stream(url, "MTConnectStreams");
sampleStream.ConnectionTimeout = Timeout;
sampleStream.XmlReceived += ProcessSampleResponse;
sampleStream.XmlError += SampleStream_XmlError;
sampleStream.ConnectionError += ProcessConnectionError;
sampleStream.Run();
}
} while (!stop.WaitOne(RetryInterval, true));
}
} while (!stop.WaitOne(RetryInterval, true));
Stopped?.Invoke();
}