/// <summary>
/// Gets the parameters.
/// FO-dicom server initialization does not appear to be thread safe so we use this code to give it ample time to init.
/// Please access the parameters by calling GetParameters() in an association request.
/// </summary>
/// <param name="timeoutSeconds">The time we will wait until the parameters are not null.</param>
/// <returns>The parameters.</returns>
private DicomFileStoreParameters GetParameters(uint timeoutSeconds = 5)
{
_parameters = UserState as DicomFileStoreParameters;
if (_parameters == null && timeoutSeconds > 0)
{
SpinWait.SpinUntil(() => _parameters != null, TimeSpan.FromSeconds(timeoutSeconds));
}
if (_parameters == null)
{
Trace.TraceError("No FileStoreParameters object provided at DicomServer initialization. Incoming DICOM requests will not be handled correctly.");
}
else if (_parameters?.DicomSaver == null)
{
Trace.TraceWarning("File Store service is created, but no image saver class provided. Incoming images will not be saved.");
}
return(_parameters);
}
/// <inheritdoc />
/// <exception cref="DicomNetworkException">If the service is already listening.</exception>
/// <exception cref="System.Net.Sockets.SocketException">If another service is already listening on this socket.</exception>
public bool StartServer(int port, Func <IReadOnlyDictionary <DicomUID, DicomTransferSyntax[]> > getAcceptedTransferSyntaxes, TimeSpan timeout)
{
if (!ApplicationEntityValidationHelpers.ValidatePort(port))
{
throw new ArgumentException("The port is not valid.", nameof(port));
}
// Check if we are already listening
if (IsListening)
{
throw new DicomNetworkException("We are already listening. Please call stop server before starting.");
}
// Looks like StartServer has been called before but failed to start listening.
// Lets dispose of the current instance and try again.
if (_dicomServer != null)
{
DisposeDicomServer();
}
var fileStoreParameters = new DicomFileStoreParameters(DicomDataReceiverUpdate, getAcceptedTransferSyntaxes, _dicomSaver);
// Preload dictionary to prevent timeouts
DicomDictionary.EnsureDefaultDictionariesLoaded();
// Constructing the listener dicom server will attempt to start the service.
_dicomServer = DicomServer.Create <ListenerDicomService>(ipAddress: "localhost", port: port, userState: fileStoreParameters);
// Wait until listening or we have an exception.
SpinWait.SpinUntil(() => _dicomServer.IsListening || _dicomServer.Exception != null, timeout);
if (_dicomServer.Exception != null)
{
// Throw any exceptions
throw _dicomServer.Exception;
}
return(_dicomServer?.IsListening ?? false);
}
