OnReceiveCStoreRequest Method

Summary

Notifies a connection that a C-STORE-REQ command was received.

Syntax

Objective-C

C++/CLI

protected virtual void OnReceiveCStoreRequest( 
   byte presentationID, 
   int messageID, 
   string affectedClass, 
   string instance, 
   DicomCommandPriorityType priority, 
   string moveAE, 
   int moveMessageID, 
   DicomDataSet dataSet 
)

- (void)onReceiveCStoreRequest:(uint8_t)presentationID messageID:(uint16_t)messageID affectedClass:(NSString *)affectedClass instance:(NSString *)instance priority:(LTDicomCommandPriorityType)priority moveAE:(NSString *)moveAE moveMessageID:(uint16_t)moveMessageID dataSet:(null_unspecified LTDicomDataSet *)dataSet;

protected: 
virtual void OnReceiveCStoreRequest(  
   byte presentationID, 
   int messageID, 
   String^ affectedClass, 
   String^ instance, 
   DicomCommandPriorityType priority, 
   String^ moveAE, 
   int moveMessageID, 
   DicomDataSet^ dataSet 
)

Parameters

presentationID
The Presentation Context ID. The ID provides information about both the class type of the data and the Transfer Syntax to use when transferring the data.

messageID
The Message ID. Each message sent by a member of a connection should have a unique ID. Since a member of a connection may send several messages, this ID allows that member to identify when a specific request has been completed.

affectedClass
The class affected by the request. This will be a SOP Class or a Meta SOP Class.

instance
The instance of the class. A server may, for example, have three instances of the Nuclear Medicine Class. This value identifies the data with a specific instance.

priority
The priority level of the message. The Service Class Provider may or may not support priority. Therefore, setting this parameter may or may not have any effect.

moveAE
The name of the Application Entity that originally requested the move. For a simple storage request from a client to a server, this will be an empty string. When the request is a sub-operation of a C-MOVE, this will contain the name of the AE that requested the move.

moveMessageID
The ID of the original move request message. For a simple storage request from a client to a server, this will be 0. When the request is a sub-operation of a C-MOVE, this will contain the original message ID of the C-MOVE request.

dataSet
A DicomDataSet object that contains the Data Set to be stored.

Remarks

A call to this method is generated on a peer member of a connection when SendCStoreRequest is called. To customize this method, you must derive a class from DicomNet and override this method.

When an SCU requests a Move (C-MOVE-REQ), the SCP may have to call SendCStoreRequest to request one or more C-STORE-REQ sub-operations to complete the storage. The series of calls and information transfer in a C-MOVE-REQ is complicated. For more information, refer to Moving Composite Data.

Example

using Leadtools.Dicom; 
 
using Leadtools.Dicom.Common.DataTypes.Status; 
using Leadtools.Dicom.Common.Extensions; 
 
[StructLayout(LayoutKind.Sequential)] 
public struct MSG 
{ 
   public IntPtr hwnd; 
   public uint message; 
   public IntPtr wParam; 
   public IntPtr lParam; 
   public uint time; 
   public System.Drawing.Point p; 
} 
 
public enum WaitReturn 
{ 
   Complete, 
   Timeout, 
} 
 
class Utils 
{ 
   [DllImport("user32.dll")] 
   [return: MarshalAs(UnmanagedType.Bool)] 
   static extern bool PeekMessage(out MSG lpMsg, IntPtr hWnd, 
                                  uint wMsgFilterMin, uint wMsgFilterMax, 
                                  uint wRemoveMsg); 
 
   [DllImport("user32.dll")] 
   static extern bool TranslateMessage([In] ref MSG lpMsg); 
   [DllImport("user32.dll")] 
   static extern IntPtr DispatchMessage([In] ref MSG lpmsg); 
 
   const uint PM_REMOVE = 1; 
 
   public static WaitReturn WaitForComplete(double mill, WaitHandle wh) 
   { 
      TimeSpan goal = new TimeSpan(DateTime.Now.AddMilliseconds(mill).Ticks); 
 
      do 
      { 
         MSG msg = new MSG(); 
 
         if (PeekMessage(out msg, IntPtr.Zero, 0, 0, PM_REMOVE)) 
         { 
            TranslateMessage(ref msg); 
            DispatchMessage(ref msg); 
         } 
 
         if (wh.WaitOne(new TimeSpan(0, 0, 0), false)) 
         { 
            return WaitReturn.Complete; 
         } 
 
         if (goal.CompareTo(new TimeSpan(DateTime.Now.Ticks)) < 0) 
         { 
            return WaitReturn.Timeout; 
         } 
 
      } while (true); 
   } 
} 
 
class Client : DicomNet 
{ 
   DicomExceptionCode _LastError = DicomExceptionCode.Success; 
   AutoResetEvent waitEvent = new AutoResetEvent(false); 
 
   public Client() 
       : base(null, DicomNetSecurityMode.None) 
   { 
   } 
 
   public DicomExceptionCode LastError 
   { 
      get 
      { 
         return _LastError; 
      } 
   } 
 
   public bool Wait() 
   { 
      WaitReturn ret; 
 
      _LastError = DicomExceptionCode.Success; 
      ret = Utils.WaitForComplete((5 * 60) * 1000, waitEvent); 
 
      return (ret == WaitReturn.Complete); 
   } 
 
   protected override void OnConnect(DicomExceptionCode error) 
   { 
      _LastError = error; 
      waitEvent.Set(); 
   } 
 
   protected override void OnReceiveAssociateAccept(DicomAssociate association) 
   { 
      waitEvent.Set(); 
   } 
 
   protected override void OnReceiveCStoreResponse(byte presentationID, int messageID, string affectedClass, string instance, DicomCommandStatusType status) 
   { 
      Debug.Assert(status == DicomCommandStatusType.Success, "Status should be success"); 
 
      DicomDataSet cs = this.GetCommandSet(); 
      string statusAllString = string.Empty; 
 
      if (cs != null) 
      { 
         StatusAll statusAll = cs.Get<StatusAll>(); 
         if (statusAll != null) 
         { 
            StatusFormatFlags flags = StatusFormatFlags.None; 
            statusAllString = statusAll.ToString(flags, "\n\t", "\t"); 
 
            // Print the friendly-string showing status-related elements 
            Debug.WriteLine(statusAllString); 
         } 
      } 
 
      waitEvent.Set(); 
   } 
 
   protected override void OnReceive(DicomExceptionCode error, DicomPduType pduType, IntPtr buffer, int bytes) 
   { 
      base.OnReceive(error, pduType, buffer, bytes); 
   } 
 
   protected override void OnSend(DicomExceptionCode error, DicomPduType type, int length) 
   { 
      base.OnSend(error, type, length); 
   } 
} 
 
class ServerConnection : DicomNet 
{ 
   public ServerConnection() 
       : base(null, DicomNetSecurityMode.None) 
   { 
   } 
 
   protected override void OnReceiveAssociateRequest(DicomAssociate association) 
   { 
      DicomAssociate retAssociation = new DicomAssociate(false); 
 
      Debug.Assert(association.Called == "ServerTest", "Called AETitle should be ServerTest"); 
      Debug.Assert(association.Calling == "ClientTest", "Calling AETitle should be ClientTest"); 
      Debug.Assert(association.ImplementClass == "1.2.840.114257.1", "Implementation class should be 1.2.840.114257.1"); 
      Debug.Assert(association.ImplementationVersionName == "1", "Implementation version should be 1"); 
      Debug.Assert(association.MaxLength == 0x100000, "Max length should be 0x100000"); 
      Debug.Assert(association.GetAbstract(1) == DicomUidType.VerificationClass, "Presentation index 1 should be " + DicomUidType.VerificationClass); 
      Debug.Assert(association.GetTransfer(1, 0) == DicomUidType.ImplicitVRLittleEndian, "Abstract Syntax (1,0) should be " + DicomUidType.ImplicitVRLittleEndian); 
 
      // 
      // Build our Association Accept 
      // 
      retAssociation.Called = association.Called; 
      retAssociation.Calling = association.Calling; 
      retAssociation.ImplementClass = association.ImplementClass; 
      retAssociation.ImplementationVersionName = association.ImplementationVersionName; 
      for (int x = 0; x < association.PresentationContextCount; x++) 
      { 
         byte id = association.GetPresentationContextID(x); 
         string abSyntax = association.GetAbstract(id); 
         string trSyntax = DicomUidType.ImplicitVRLittleEndian; 
 
         retAssociation.AddPresentationContext(id, 0, abSyntax); 
         if (association.GetTransferCount(id) > 0) 
         { 
            trSyntax = association.GetTransfer(id, 0); 
         } 
 
         retAssociation.AddTransfer(id, trSyntax); 
      } 
      SendAssociateAccept(retAssociation); 
   } 
 
   protected override void OnReceiveCStoreRequest(byte presentationID, int messageID, string affectedClass, string instance, DicomCommandPriorityType priority, string moveAE, int moveMessageID, DicomDataSet dataSet) 
   { 
      byte id = Association.FindAbstract(affectedClass); 
 
      Debug.Assert(id == presentationID, "PresentationID is invalid"); 
      Debug.Assert(messageID == 2, "Invalid message id.  Should be 2"); 
      Debug.Assert(dataSet != null, "Dataset should not be null"); 
      Debug.Assert(moveAE == "NONE", "Move AE should be NONE"); 
      Debug.Assert(moveMessageID == 1, "Move message id should be 1"); 
      Debug.Assert(priority == DicomCommandPriorityType.Medium, "Priority should be medium"); 
 
      SendCStoreResponse(presentationID, messageID, affectedClass, instance, DicomCommandStatusType.Success); 
   } 
} 
 
class Server : DicomNet 
{ 
   ServerConnection client; 
 
   public Server() 
       : base(null, DicomNetSecurityMode.None) 
   { 
   } 
 
   protected override void OnAccept(DicomExceptionCode error) 
   { 
      client = new ServerConnection(); 
 
      Accept(client); 
   } 
} 
 
public void SendCStoreRequestSample() 
{ 
   DicomEngine.Startup(); 
   DicomNet.Startup(); 
 
   using (Server server = new Server()) 
   { 
      using (Client client = new Client()) 
      { 
         string storageClass = ""; 
         string storageInstance = "998.998.1.1.19950214.94000.1.102"; 
         DicomDataSet ds = new DicomDataSet(); 
         DicomElement element; 
         string transferSyntax = DicomUidType.JPEGLosslessNonhier14; 
         string dicomFileName = Path.Combine(LEAD_VARS.ImagesDir, "DICOM","image3.dcm"); 
 
         // 
         // Connect to server 
         // 
         server.Listen("127.0.0.1", 104, 1); // start server 
         client.Connect(null, 1000, "127.0.0.1", 104); // connect to server 
         if (!client.Wait()) // wait for connection to finish 
         { 
            Debug.Fail("Connection timed out"); 
         } 
         Debug.Assert(client.LastError == DicomExceptionCode.Success, "Connection failed"); 
         Debug.Assert(client.IsConnected(), "Client not connected"); 
 
         ds.Load(dicomFileName, DicomDataSetLoadFlags.LoadAndClose); 
         element = ds.FindFirstElement(null, DicomTag.MediaStorageSOPClassUID, true); 
         if (element != null) 
         { 
            storageClass = ds.GetStringValue(element, 0); 
         } 
 
         if (storageClass.Length == 0) 
         { 
            element = ds.FindFirstElement(null, DicomTag.SOPInstanceUID, true); 
            if (element != null) 
            { 
               storageClass = ds.GetStringValue(element, 0); 
            } 
         } 
 
         if (storageClass.Length == 0) 
            storageClass = "1.1.1.1"; 
 
         // 
         // Get Image transfer syntax 
         // 
         element = ds.FindFirstElement(null, DicomTag.TransferSyntaxUID, true); 
         if (element != null) 
         { 
            transferSyntax = ds.GetStringValue(element, 0); 
         } 
 
         element = ds.FindFirstElement(null, DicomTag.SOPInstanceUID, true); 
         if (element != null) 
         { 
            storageInstance = ds.GetStringValue(element, 0); 
         } 
 
         // 
         // Send associate request 
         // 
         DicomAssociate associate = new DicomAssociate(true); 
 
         associate.Called = "ServerTest"; 
         associate.Calling = "ClientTest"; 
         associate.ImplementClass = "1.2.840.114257.1"; 
         associate.ImplementationVersionName = "1"; 
         associate.MaxLength = 0x100000; 
         associate.AddPresentationContext(1, 0, DicomUidType.VerificationClass); 
         associate.AddTransfer(1, DicomUidType.ImplicitVRLittleEndian); 
         associate.AddPresentationContext(3, 0, storageClass); 
         associate.AddTransfer(3, transferSyntax); 
         client.SendAssociateRequest(associate); 
         if (!client.Wait()) // wait for connection to finish 
         { 
            Debug.Fail("SendAssociateRequest timed out"); 
         } 
 
         // 
         // Send Echo Request 
         // 
         byte pid = client.Association.FindAbstract(storageClass); 
 
         client.SendCStoreRequest(pid, 2, storageClass, storageInstance, 
                                  DicomCommandPriorityType.Medium, "NONE", 1, ds); 
         if (!client.Wait()) // wait for connection to finish 
         { 
            Debug.Fail("SendCStoreRequest timed out"); 
         } 
 
         client.CloseForced(true); 
      } 
      server.CloseForced(true); 
   } 
 
   DicomEngine.Shutdown(); 
   DicomNet.Shutdown(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}