/// <summary> /// Completes a single request and removes it from the transaction /// </summary> /// <returns> /// S_OK - Everything was OK /// S_FALSE - Everything was OK /// The Result should be checked with ResultCode.SUCCEEDED /// or with ResultCode.FAILED /// </returns> /// <include /// file='TBNS.doc.xml' /// path='//class[@name="DaTransaction"]/ /// method[@name="CompleteRequest"]/doc/*' /// /> public int CompleteRequest(DaRequest aRequest) { int result = (int) EnumResultCode.E_FAIL; OTValueData[] values = new OTValueData[1]; OTSRequestData[] requests = new OTSRequestData[1]; int[] results = new int[1]; try { DaRequest request = aRequest as DaRequest; if (request != null) { request.RequestState = EnumRequestState.COMPLETED; // remove the request from the list RemoveRequest(request); requests[0].m_sessionHandle = request.SessionHandle; requests[0].m_propertyID = request.PropertyId; requests[0].m_requestHandle = request.RequestHandle; if (request.AddressSpaceElement != null) { requests[0].m_object.m_userData = (uint) request.AddressSpaceElement.UserData; requests[0].m_object.m_objectHandle = request.AddressSpaceElement.ObjectHandle; } else { requests[0].m_object.m_userData = 0; requests[0].m_object.m_objectHandle = 0; } // end if ... else values[0] = new OTValueData(); if (request.Value != null) { values[0].m_timestamp = new OTDateTime(request.Value.TimeStamp); values[0].m_quality = (ushort) request.Value.Quality; values[0].m_value = Marshal.AllocCoTaskMem(ValueQT.VARIANT_SIZE); Marshal.GetNativeVariantForObject(request.Value.Data, values[0].m_value); results[0] = (int) request.Result; } else { values[0].m_quality = (ushort) EnumQuality.BAD; values[0].m_value = Marshal.AllocCoTaskMem(ValueQT.VARIANT_SIZE); Marshal.GetNativeVariantForObject(null, values[0].m_value); results[0] = (int) EnumResultCode.E_UNEXPECTED; } // end if ... else } else { requests[0].m_sessionHandle = 0; requests[0].m_propertyID = 0; requests[0].m_requestHandle = 0; requests[0].m_object.m_userData = 0; requests[0].m_object.m_objectHandle = 0; values[0] = new OTValueData(); values[0].m_quality = (ushort) EnumQuality.BAD; values[0].m_value = Marshal.AllocCoTaskMem(ValueQT.VARIANT_SIZE); Marshal.GetNativeVariantForObject(null, values[0].m_value); results[0] = (int) EnumResultCode.E_UNEXPECTED; } // end if ... else result = OTBFunctions.OTSCompleteRequests(1, requests, results, values); } catch (Exception e) { Application.Instance.Trace( EnumTraceLevel.ERR, EnumTraceGroup.OPCSERVER, "DaTransaction.CompleteRequest", "Exception caught: " + e.ToString()); result = (int) EnumResultCode.E_FAIL; } finally { if (this.IsEmpty) { Application.Instance.ReleaseTransaction(m_key); } OTBFunctions.OTVariantClear(values[0].m_value); Marshal.FreeCoTaskMem(values[0].m_value); } // end try ... catch ... finally return result; } // end CompleteRequest
} // end Session //- #endregion #region // Public Methods //------------------------ /// <summary> /// Completes all requests must be called while or after "handling" requests /// </summary> /// <returns> /// S_OK - Everything was OK /// S_FALSE - Everything was OK /// The Result should be checked with ResultCode.SUCCEEDED /// or with ResultCode.FAILED /// </returns> /// <include /// file='TBNS.doc.xml' /// path='//class[@name="DaTransaction"]/ /// method[@name="CompleteRequests"]/doc/*' /// /> public int CompleteRequests() { int result = (int) EnumResultCode.E_FAIL; int count = 0; OTValueData[] values = null; OTSRequestData[] requests = null; int[] results = null; try { lock (m_requestListJanitor) { count = m_requestList.Count; if (count == 0) { return (int) EnumResultCode.S_FALSE; } // end if values = new OTValueData[count]; requests = new OTSRequestData[count]; results = new int[count]; for (int i = 0; i < count; i++) { DaRequest request = m_requestList[i] as DaRequest; if (request != null) { requests[i].m_sessionHandle = request.SessionHandle; requests[i].m_propertyID = request.PropertyId; requests[i].m_requestHandle = request.RequestHandle; if (request.AddressSpaceElement != null) { requests[i].m_object.m_userData = (uint) request.AddressSpaceElement.UserData; requests[i].m_object.m_objectHandle = request.AddressSpaceElement.ObjectHandle; } else { requests[i].m_object.m_userData = 0; requests[i].m_object.m_objectHandle = 0; } // end if ... else values[i] = new OTValueData(); if (request.Value != null) { values[i].m_timestamp = new OTDateTime(request.Value.TimeStamp); values[i].m_quality = (ushort) request.Value.Quality; values[i].m_value = Marshal.AllocCoTaskMem(ValueQT.VARIANT_SIZE); Marshal.GetNativeVariantForObject(request.Value.Data, values[i].m_value); results[i] = (int) request.Result; } else { values[i].m_quality = (ushort) EnumQuality.BAD; values[i].m_value = Marshal.AllocCoTaskMem(ValueQT.VARIANT_SIZE); Marshal.GetNativeVariantForObject(null, values[i].m_value); results[i] = (int) EnumResultCode.E_UNEXPECTED; } // end if ... else } else { requests[i].m_sessionHandle = 0; requests[i].m_propertyID = 0; requests[i].m_requestHandle = 0; requests[i].m_object.m_userData = 0; requests[i].m_object.m_objectHandle = 0; values[i] = new OTValueData(); values[i].m_quality = (ushort) EnumQuality.BAD; values[i].m_value = Marshal.AllocCoTaskMem(ValueQT.VARIANT_SIZE); Marshal.GetNativeVariantForObject(null, values[i].m_value); results[i] = (int) EnumResultCode.E_UNEXPECTED; } // end if ... else request.RequestState = EnumRequestState.COMPLETED; } // end for m_requestList.Clear(); } // end lock result = OTBFunctions.OTSCompleteRequests(count, requests, results, values); } catch (Exception e) { Application.Instance.Trace( EnumTraceLevel.ERR, EnumTraceGroup.OPCSERVER, "DaTransaction.CompleteRequests", "Exception caught: " + e.ToString()); result = (int) EnumResultCode.E_FAIL; } finally { Application.Instance.ReleaseTransaction(m_key); for (int i = 0; i < count; i++) { OTBFunctions.OTVariantClear(values[i].m_value); Marshal.FreeCoTaskMem(values[i].m_value); } // end for } // end try ... catch ... finally return result; } // end CompleteRequests