private void OnEndSendCommand(IAsyncResult result)
{
var dimse = result.AsyncState as Dimse;
try {
dimse.Walker.EndWalk(result);
dimse.Stream.IsCommand = false;
var writer = new DicomWriter(dimse.PresentationContext.AcceptedTransferSyntax, DicomWriteOptions.Default, new StreamByteTarget(dimse.Stream));
dimse.Walker = new DicomDatasetWalker(dimse.Message.Dataset);
dimse.Walker.BeginWalk(writer, OnEndSendMessage, dimse);
} catch (Exception e) {
Logger.Error("Exception sending DIMSE: {0}", e.ToString());
} finally {
if (!dimse.Message.HasDataset)
{
lock (_lock)
_sending = false;
SendNextMessage();
}
}
}
private void SendNextMessage()
{
DicomMessage msg;
lock (_lock) {
if (_msgQueue.Count == 0)
{
if (_pending.Count == 0)
{
OnSendQueueEmpty();
}
return;
}
if (_sending)
{
return;
}
if (Association.MaxAsyncOpsInvoked > 0 && _pending.Count >= Association.MaxAsyncOpsInvoked)
{
return;
}
_sending = true;
msg = _msgQueue.Dequeue();
}
if (msg is DicomRequest)
{
_pending.Add(msg as DicomRequest);
}
DicomPresentationContext pc = null;
if (msg is DicomCStoreRequest)
{
pc = Association.PresentationContexts.FirstOrDefault(x => x.Result == DicomPresentationContextResult.Accept && x.AbstractSyntax == msg.SOPClassUID && x.AcceptedTransferSyntax == (msg as DicomCStoreRequest).TransferSyntax);
if (pc == null)
{
pc = Association.PresentationContexts.FirstOrDefault(x => x.Result == DicomPresentationContextResult.Accept && x.AbstractSyntax == msg.SOPClassUID);
}
}
else
{
pc = Association.PresentationContexts.FirstOrDefault(x => x.Result == DicomPresentationContextResult.Accept && x.AbstractSyntax == msg.SOPClassUID);
}
if (pc == null)
{
pc = msg.PresentationContext;
}
if (pc == null)
{
_pending.Remove(msg as DicomRequest);
try {
if (msg is DicomCStoreRequest)
{
(msg as DicomCStoreRequest).PostResponse(this, new DicomCStoreResponse(msg as DicomCStoreRequest, DicomStatus.SOPClassNotSupported));
}
else if (msg is DicomCEchoRequest)
{
(msg as DicomCEchoRequest).PostResponse(this, new DicomCEchoResponse(msg as DicomCEchoRequest, DicomStatus.SOPClassNotSupported));
}
else if (msg is DicomCFindRequest)
{
(msg as DicomCFindRequest).PostResponse(this, new DicomCFindResponse(msg as DicomCFindRequest, DicomStatus.SOPClassNotSupported));
}
else if (msg is DicomCMoveRequest)
{
(msg as DicomCMoveRequest).PostResponse(this, new DicomCMoveResponse(msg as DicomCMoveRequest, DicomStatus.SOPClassNotSupported));
}
//TODO: add N services
} catch {
}
Logger.Error("No accepted presentation context found for abstract syntax: {0}", msg.SOPClassUID);
lock (_lock)
_sending = false;
SendNextMessage();
return;
}
var dimse = new Dimse();
dimse.Message = msg;
dimse.PresentationContext = pc;
// force calculation of command group length as required by standard
msg.Command.RecalculateGroupLengths();
if (msg.HasDataset)
{
// remove group lengths as recommended in PS 3.5 7.2
//
// 2. It is recommended that Group Length elements be removed during storage or transfer
// in order to avoid the risk of inconsistencies arising during coercion of data
// element values and changes in transfer syntax.
msg.Dataset.RemoveGroupLengths();
if (msg.Dataset.InternalTransferSyntax != dimse.PresentationContext.AcceptedTransferSyntax)
{
msg.Dataset = msg.Dataset.ChangeTransferSyntax(dimse.PresentationContext.AcceptedTransferSyntax);
}
}
Logger.Info("{0} -> {1}", LogID, msg.ToString(Options.LogDimseDatasets));
dimse.Stream = new PDataTFStream(this, pc.ID, Association.MaximumPDULength);
var writer = new DicomWriter(DicomTransferSyntax.ImplicitVRLittleEndian, DicomWriteOptions.Default, new StreamByteTarget(dimse.Stream));
dimse.Walker = new DicomDatasetWalker(msg.Command);
if (dimse.Message.HasDataset)
{
dimse.Walker.BeginWalk(writer, OnEndSendCommand, dimse);
}
else
{
dimse.Walker.BeginWalk(writer, OnEndSendMessage, dimse);
}
}
private void SendNextMessage()
{
DicomMessage msg;
lock (_lock) {
if (_msgQueue.Count == 0)
{
if (_pending.Count == 0)
{
OnSendQueueEmpty();
}
return;
}
if (_sending)
{
return;
}
if (Association.MaxAsyncOpsInvoked > 0 && _pending.Count >= Association.MaxAsyncOpsInvoked)
{
return;
}
_sending = true;
msg = _msgQueue.Dequeue();
}
Logger.Log(LogLevel.Info, "{0} -> {1}", LogID, msg);
if (msg is DicomRequest)
{
_pending.Add(msg as DicomRequest);
}
DicomPresentationContext pc = null;
if (msg is DicomCStoreRequest)
{
pc = Association.PresentationContexts.FirstOrDefault(x => x.Result == DicomPresentationContextResult.Accept && x.AbstractSyntax == msg.AffectedSOPClassUID && x.AcceptedTransferSyntax == (msg as DicomCStoreRequest).TransferSyntax);
if (pc == null)
{
pc = Association.PresentationContexts.FirstOrDefault(x => x.Result == DicomPresentationContextResult.Accept && x.AbstractSyntax == msg.AffectedSOPClassUID);
}
}
else
{
pc = Association.PresentationContexts.FirstOrDefault(x => x.Result == DicomPresentationContextResult.Accept && x.AbstractSyntax == msg.AffectedSOPClassUID);
}
if (pc == null)
{
throw new DicomNetworkException("No accepted presentation context found for abstract syntax: {0}", msg.AffectedSOPClassUID);
}
var dimse = new Dimse();
dimse.Message = msg;
dimse.PresentationContext = pc;
dimse.Stream = new PDataTFStream(this, pc.ID, (int)Association.MaximumPDULength);
var writer = new DicomWriter(DicomTransferSyntax.ImplicitVRLittleEndian, DicomWriteOptions.Default, new StreamByteTarget(dimse.Stream));
dimse.Walker = new DicomDatasetWalker(msg.Command);
dimse.Walker.BeginWalk(writer, OnEndSendCommand, dimse);
}
