/// <summary>
/// Reads the data at the specified time for an item.
/// </summary>
protected override void HistoryReadAtTime(
UaServerContext context,
ReadAtTimeDetails details,
TimestampsToReturn timestampsToReturn,
IList <HistoryReadValueId> nodesToRead,
IList <HistoryReadResult> results,
IList <ServiceResult> errors,
List <UaNodeHandle> nodesToProcess,
IDictionary <NodeId, NodeState> cache)
{
throw new NotImplementedException();
}
/// <summary>
/// Fetches the recent history.
/// </summary>
private void ReadAtTime()
{
ReadAtTimeDetails details = new ReadAtTimeDetails();
// generate times
DateTime startTime = StartTimeDP.Value.ToUniversalTime();
for (int ii = 0; ii < MaxReturnValuesNP.Value; ii++)
{
details.ReqTimes.Add(startTime.AddMilliseconds((double)(ii * TimeStepNP.Value)));
}
HistoryReadValueIdCollection nodesToRead = new HistoryReadValueIdCollection();
HistoryReadValueId nodeToRead = new HistoryReadValueId();
nodeToRead.NodeId = m_nodeId;
nodesToRead.Add(nodeToRead);
HistoryReadResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_session.HistoryRead(
null,
new ExtensionObject(details),
TimestampsToReturn.Both,
false,
nodesToRead,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToRead);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToRead);
if (StatusCode.IsBad(results[0].StatusCode))
{
throw new ServiceResultException(results[0].StatusCode);
}
HistoryData values = ExtensionObject.ToEncodeable(results[0].HistoryData) as HistoryData;
DisplayResults(values);
// save any continuation point.
SaveContinuationPoint(details, nodeToRead, results[0].ContinuationPoint);
}
/// <summary>
/// Reads the history for the variable value.
/// </summary>
protected virtual ServiceResult HistoryReadAtTime(
ISystemContext context,
BaseVariableState source,
ReadAtTimeDetails details,
TimestampsToReturn timestampsToReturn,
bool releaseContinuationPoints,
HistoryReadValueId nodeToRead,
HistoryReadResult result)
{
return StatusCodes.BadHistoryOperationUnsupported;
}
/// <summary>
/// Initializes a new instance of the <see cref="HdaHistoryReadRawModifiedRequest"/> class.
/// </summary>
/// <param name="itemId">The item id.</param>
/// <param name="details">The details.</param>
/// <param name="nodeToRead">The node to read.</param>
public HdaHistoryReadAtTimeRequest(string itemId, ReadAtTimeDetails details, HistoryReadValueId nodeToRead)
:
base(itemId, details, nodeToRead)
{
ReqTimes = details.ReqTimes;
}
/// <summary>
/// Reads the history of an HDA item.
/// </summary>
private ServiceResult HistoryReadAtTime(
ServerSystemContext context,
ComHdaClient client,
ReadAtTimeDetails details,
TimestampsToReturn timestampsToReturn,
HistoryReadValueId nodeToRead,
HdaParsedNodeId parsedNodeId,
HistoryReadResult result)
{
// create the request or load it from a continuation point.
HdaHistoryReadAtTimeRequest request = null;
if (nodeToRead.ContinuationPoint == null)
{
request = new HdaHistoryReadAtTimeRequest(parsedNodeId.RootId, details, nodeToRead);
}
else
{
request = LoadContinuationPoint(context, nodeToRead.ContinuationPoint) as HdaHistoryReadAtTimeRequest;
if (request == null)
{
return StatusCodes.BadContinuationPointInvalid;
}
}
// fetch the data.
result.StatusCode = client.ReadHistory(request);
// fill in the results.
if (request.Results != null)
{
HistoryData data = new HistoryData();
data.DataValues = request.Results;
result.HistoryData = new ExtensionObject(data);
}
// create a new continuation point.
if (!request.Completed)
{
result.ContinuationPoint = SaveContinuationPoint(context, request);
}
return result.StatusCode;
}
/// <summary>
/// Reads processed history data.
/// </summary>
protected override void HistoryReadAtTime(
ServerSystemContext context,
ReadAtTimeDetails details,
TimestampsToReturn timestampsToReturn,
IList<HistoryReadValueId> nodesToRead,
IList<HistoryReadResult> results,
IList<ServiceResult> errors,
List<NodeHandle> nodesToProcess,
IDictionary<NodeId, NodeState> cache)
{
ComHdaClientManager system = (ComHdaClientManager)this.SystemContext.SystemHandle;
ComHdaClient client = (ComHdaClient)system.SelectClient((ServerSystemContext)SystemContext, false);
for (int ii = 0; ii < nodesToProcess.Count; ii++)
{
NodeHandle handle = nodesToProcess[ii];
HistoryReadValueId nodeToRead = nodesToRead[handle.Index];
HistoryReadResult result = results[handle.Index];
// check if the node id has been parsed.
HdaParsedNodeId parsedNodeId = handle.ParsedNodeId as HdaParsedNodeId;
if (parsedNodeId == null)
{
errors[handle.Index] = StatusCodes.BadNodeIdInvalid;
continue;
}
// read the history of an item.
if (parsedNodeId.RootType == HdaModelUtils.HdaItem)
{
errors[handle.Index] = HistoryReadAtTime(
context,
client,
details,
timestampsToReturn,
nodeToRead,
parsedNodeId,
result);
continue;
}
errors[handle.Index] = StatusCodes.BadHistoryOperationUnsupported;
}
}
/// <summary>
/// Reads the history of values for a set of variables at given time.
/// </summary>
static void HistoryReadAtTime(Session session)
{
// translate browse paths.
IList<NodeOfInterest> nodeIds = GetNodeIds(session, Opc.Ua.Objects.ObjectsFolder,
VariableBrowsePaths.ToArray());
DiagnosticInfoCollection diagnosticInfos;
ReadAtTimeDetails readDetails = new ReadAtTimeDetails();
readDetails.ReqTimes = new DateTimeCollection();
for (int jj = 0; jj < 10; jj++)
{
readDetails.ReqTimes.Add(new DateTime(2008, 01, 01, 12, 0, jj));
readDetails.ReqTimes.Add(new DateTime(2008, 01, 01, 12, 0, jj, (int) 500));
}
ExtensionObject eo = new ExtensionObject(readDetails.TypeId, readDetails);
HistoryReadValueIdCollection idCollection = new HistoryReadValueIdCollection();
for (int ii = 0; ii < nodeIds.Count; ii++)
{
HistoryReadValueId readValueId = new HistoryReadValueId();
readValueId.NodeId = nodeIds[ii].NodeId;
readValueId.Processed = false;
idCollection.Add(readValueId);
}
HistoryReadResultCollection historyReadResults;
ResponseHeader responseHeader =
session.HistoryRead(null, eo, TimestampsToReturn.Both, true,
idCollection, out historyReadResults, out diagnosticInfos);
// process results.
for (int ii = 0; ii < historyReadResults.Count; ii++)
{
HistoryReadResult historyReadResult = historyReadResults[ii];
HistoryData historyData = null;
DataValueCollection dataValues = null;
if (historyReadResult.HistoryData != null)
{
historyData = ExtensionObject.ToEncodeable(historyReadResult.HistoryData) as HistoryData;
dataValues = historyData.DataValues;
}
ServiceResult result = Session.GetResult(historyReadResult.StatusCode, ii, diagnosticInfos, responseHeader);
Console.WriteLine("HistoryRead result code for {0}: {1}", VariableBrowsePaths[ii], result.StatusCode.ToString());
if (StatusCode.IsBad(historyReadResult.StatusCode))
{
continue;
}
if (dataValues == null)
{
Console.WriteLine("dataValues == null");
continue;
}
for (int jj = 0; jj < dataValues.Count; jj++)
{
DataValue dataValue = dataValues[jj];
// write value.
Console.WriteLine("{0}: V={1}, Q={2}, SrvT={3}, SrcT={4}", jj,
dataValue.Value == null ? "null" : dataValue.Value.ToString(),
dataValue.StatusCode.ToString(),
dataValue.ServerTimestamp, dataValue.SourceTimestamp);
}
}
}
/// <summary>
/// Reads history data at specified times.
/// </summary>
protected virtual void HistoryReadAtTime(
ServerSystemContext context,
ReadAtTimeDetails details,
TimestampsToReturn timestampsToReturn,
IList<HistoryReadValueId> nodesToRead,
IList<HistoryReadResult> results,
IList<ServiceResult> errors,
List<NodeHandle> nodesToProcess,
IDictionary<NodeId, NodeState> cache)
{
for (int ii = 0; ii < nodesToProcess.Count; ii++)
{
NodeHandle handle = nodesToProcess[ii];
// validate node.
NodeState source = ValidateNode(context, handle, cache);
if (source == null)
{
continue;
}
errors[handle.Index] = StatusCodes.BadHistoryOperationUnsupported;
}
}
/// <summary>
/// Reads the history of values for a set of variables at given time.
/// </summary>
static void HistoryReadAtTime(Session session)
{
// translate browse paths.
IList <NodeOfInterest> nodeIds = GetNodeIds(session, Opc.Ua.Objects.ObjectsFolder,
VariableBrowsePaths.ToArray());
DiagnosticInfoCollection diagnosticInfos;
ReadAtTimeDetails readDetails = new ReadAtTimeDetails();
readDetails.ReqTimes = new DateTimeCollection();
for (int jj = 0; jj < 10; jj++)
{
readDetails.ReqTimes.Add(new DateTime(2008, 01, 01, 12, 0, jj));
readDetails.ReqTimes.Add(new DateTime(2008, 01, 01, 12, 0, jj, (int)500));
}
ExtensionObject eo = new ExtensionObject(readDetails.TypeId, readDetails);
HistoryReadValueIdCollection idCollection = new HistoryReadValueIdCollection();
for (int ii = 0; ii < nodeIds.Count; ii++)
{
HistoryReadValueId readValueId = new HistoryReadValueId();
readValueId.NodeId = nodeIds[ii].NodeId;
readValueId.Processed = false;
idCollection.Add(readValueId);
}
HistoryReadResultCollection historyReadResults;
ResponseHeader responseHeader =
session.HistoryRead(null, eo, TimestampsToReturn.Both, true,
idCollection, out historyReadResults, out diagnosticInfos);
// process results.
for (int ii = 0; ii < historyReadResults.Count; ii++)
{
HistoryReadResult historyReadResult = historyReadResults[ii];
HistoryData historyData = null;
DataValueCollection dataValues = null;
if (historyReadResult.HistoryData != null)
{
historyData = ExtensionObject.ToEncodeable(historyReadResult.HistoryData) as HistoryData;
dataValues = historyData.DataValues;
}
ServiceResult result = Session.GetResult(historyReadResult.StatusCode, ii, diagnosticInfos, responseHeader);
Console.WriteLine("HistoryRead result code for {0}: {1}", VariableBrowsePaths[ii], result.StatusCode.ToString());
if (StatusCode.IsBad(historyReadResult.StatusCode))
{
continue;
}
if (dataValues == null)
{
Console.WriteLine("dataValues == null");
continue;
}
for (int jj = 0; jj < dataValues.Count; jj++)
{
DataValue dataValue = dataValues[jj];
// write value.
Console.WriteLine("{0}: V={1}, Q={2}, SrvT={3}, SrcT={4}", jj,
dataValue.Value == null ? "null" : dataValue.Value.ToString(),
dataValue.StatusCode.ToString(),
dataValue.ServerTimestamp, dataValue.SourceTimestamp);
}
}
}
/// <summary>
/// Creates the read requests.
/// </summary>
private List<HdaReadRequest> CreateReadRequests(
Session session,
DateTime[] timestamps,
int[] serverHandles,
ReadAtTimeDetails details)
{
if (m_configuration.MaxReturnValues > 0 && timestamps.Length > m_configuration.MaxReturnValues)
{
throw ComUtils.CreateComException(ResultIds.E_MAXEXCEEDED);
}
details.ReqTimes.AddRange(timestamps);
// build the list of requests.
List<HdaReadRequest> requests = new List<HdaReadRequest>();
for (int ii = 0; ii < serverHandles.Length; ii++)
{
HdaReadRequest request = new HdaReadRequest();
requests.Add(request);
// look up server handle.
request.Handle = m_itemManager.LookupHandle(serverHandles[ii]);
if (request.Handle == null)
{
request.Error = ResultIds.E_INVALIDHANDLE;
continue;
}
// set node id to use.
request.NodeId = request.Handle.NodeId;
request.ClientHandle = request.Handle.ClientHandle;
}
return requests;
}
/// <summary>
/// Reads the data at the specified times.
/// </summary>
public int[] ReadAtTime(
int transactionId,
DateTime[] timestamps,
int[] serverHandles,
out int cancelId)
{
Session session = ThrowIfNotConnected();
// create the read requests.
ReadAtTimeDetails details = new ReadAtTimeDetails();
List<HdaReadRequest> requests = CreateReadRequests(
session,
timestamps,
serverHandles,
details);
// queue the transaction.
int[] errors = CreateTransaction(
TransationType.Read,
transactionId,
new ExtensionObject(details),
requests,
false,
out cancelId);
// return the initial results.
return errors;
}
/// <summary>
/// Reads the data at the specified times.
/// </summary>
public List<HdaReadRequest> ReadAtTime(
DateTime[] timestamps,
int[] serverHandles)
{
Session session = ThrowIfNotConnected();
// create the read requests.
ReadAtTimeDetails details = new ReadAtTimeDetails();
List<HdaReadRequest> requests = CreateReadRequests(
session,
timestamps,
serverHandles,
details);
ExtensionObject extension = new ExtensionObject(details);
// fetch all of the values.
if (ReadNext(session, extension, requests, false))
{
ReadNext(session, extension, requests, true);
}
return requests;
}
/// <summary>
/// Fetches the recent history.
/// </summary>
private void ReadAtTime()
{
ReadAtTimeDetails details = new ReadAtTimeDetails();
// generate times
DateTime startTime = StartTimeDP.Value.ToUniversalTime();
for (int ii = 0; ii < MaxReturnValuesNP.Value; ii++)
{
details.ReqTimes.Add(startTime.AddMilliseconds((double)(ii*TimeStepNP.Value)));
}
HistoryReadValueIdCollection nodesToRead = new HistoryReadValueIdCollection();
HistoryReadValueId nodeToRead = new HistoryReadValueId();
nodeToRead.NodeId = m_nodeId;
nodesToRead.Add(nodeToRead);
HistoryReadResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
m_session.HistoryRead(
null,
new ExtensionObject(details),
TimestampsToReturn.Both,
false,
nodesToRead,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToRead);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToRead);
if (StatusCode.IsBad(results[0].StatusCode))
{
throw new ServiceResultException(results[0].StatusCode);
}
HistoryData values = ExtensionObject.ToEncodeable(results[0].HistoryData) as HistoryData;
DisplayResults(values);
// save any continuation point.
SaveContinuationPoint(details, nodeToRead, results[0].ContinuationPoint);
}
/// <summary>
/// Reads the data at the specified time for an item.
/// </summary>
protected override void HistoryReadAtTime(
ServerSystemContext context,
ReadAtTimeDetails details,
TimestampsToReturn timestampsToReturn,
IList<HistoryReadValueId> nodesToRead,
IList<HistoryReadResult> results,
IList<ServiceResult> errors,
List<NodeHandle> nodesToProcess,
IDictionary<NodeId, NodeState> cache)
{
for (int ii = 0; ii < nodesToRead.Count; ii++)
{
NodeHandle handle = nodesToProcess[ii];
HistoryReadValueId nodeToRead = nodesToRead[handle.Index];
HistoryReadResult result = results[handle.Index];
HistoryReadRequest request = null;
try
{
// validate node.
NodeState source = ValidateNode(context, handle, cache);
if (source == null)
{
continue;
}
// load an exising request.
if (nodeToRead.ContinuationPoint != null)
{
request = LoadContinuationPoint(context, nodeToRead.ContinuationPoint);
if (request == null)
{
errors[handle.Index] = StatusCodes.BadContinuationPointInvalid;
continue;
}
}
// create a new request.
else
{
request = CreateHistoryReadRequest(
context,
details,
handle,
nodeToRead);
}
// process values until the max is reached.
HistoryData data = new HistoryData();
while (request.NumValuesPerNode == 0 || data.DataValues.Count < request.NumValuesPerNode)
{
if (request.Values.Count == 0)
{
break;
}
DataValue value = request.Values.First.Value;
request.Values.RemoveFirst();
data.DataValues.Add(value);
}
errors[handle.Index] = ServiceResult.Good;
// check if a continuation point is requred.
if (request.Values.Count > 0)
{
result.ContinuationPoint = SaveContinuationPoint(context, request);
}
// check if no data returned.
else
{
errors[handle.Index] = StatusCodes.GoodNoData;
}
// return the data.
result.HistoryData = new ExtensionObject(data);
}
catch (Exception e)
{
errors[handle.Index] = ServiceResult.Create(e, StatusCodes.BadUnexpectedError, "Unexpected error processing request.");
}
}
}
/// <summary>
/// Creates a new history request.
/// </summary>
private HistoryReadRequest CreateHistoryReadRequest(
ServerSystemContext context,
ReadAtTimeDetails details,
NodeHandle handle,
HistoryReadValueId nodeToRead)
{
bool applyIndexRangeOrEncoding = (nodeToRead.ParsedIndexRange != NumericRange.Empty || !QualifiedName.IsNull(nodeToRead.DataEncoding));
ArchiveItemState item = handle.Node as ArchiveItemState;
if (item == null)
{
throw new ServiceResultException(StatusCodes.BadNotSupported);
}
item.ReloadFromSource(context);
// find the start and end times.
DateTime startTime = DateTime.MaxValue;
DateTime endTime = DateTime.MinValue;
for (int ii = 0; ii < details.ReqTimes.Count; ii++)
{
if (startTime > details.ReqTimes[ii])
{
startTime = details.ReqTimes[ii];
}
if (endTime < details.ReqTimes[ii])
{
endTime = details.ReqTimes[ii];
}
}
DataView view = item.ReadHistory(startTime, endTime, false);
LinkedList<DataValue> values = new LinkedList<DataValue>();
for (int ii = 0; ii < details.ReqTimes.Count; ii++)
{
bool dataBeforeIgnored = false;
bool dataAfterIgnored = false;
// find the value at the time.
int index = item.FindValueAtOrBefore(view, details.ReqTimes[ii], !details.UseSimpleBounds, out dataBeforeIgnored);
if (index < 0)
{
values.AddLast(new DataValue(StatusCodes.BadNoData, details.ReqTimes[ii]));
continue;
}
// nothing more to do if a raw value exists.
if ((DateTime)view[index].Row[0] == details.ReqTimes[ii])
{
values.AddLast((DataValue)view[index].Row[2]);
continue;
}
DataValue before = (DataValue)view[index].Row[2];
DataValue value;
// find the value after the time.
int afterIndex = item.FindValueAfter(view, index, !details.UseSimpleBounds, out dataAfterIgnored);
if (afterIndex < 0)
{
// use stepped interpolation if no end bound exists.
value = AggregateCalculator.SteppedInterpolate(details.ReqTimes[ii], before);
if (StatusCode.IsNotBad(value.StatusCode) && dataBeforeIgnored)
{
value.StatusCode = value.StatusCode.SetCodeBits(StatusCodes.UncertainDataSubNormal);
}
values.AddLast(value);
continue;
}
// use stepped or slopped interpolation depending on the value.
if (item.ArchiveItem.Stepped)
{
value = AggregateCalculator.SteppedInterpolate(details.ReqTimes[ii], before);
if (StatusCode.IsNotBad(value.StatusCode) && dataBeforeIgnored)
{
value.StatusCode = value.StatusCode.SetCodeBits(StatusCodes.UncertainDataSubNormal);
}
}
else
{
value = AggregateCalculator.SlopedInterpolate(details.ReqTimes[ii], before, (DataValue)view[afterIndex].Row[2]);
if (StatusCode.IsNotBad(value.StatusCode) && (dataBeforeIgnored || dataAfterIgnored))
{
value.StatusCode = value.StatusCode.SetCodeBits(StatusCodes.UncertainDataSubNormal);
}
}
values.AddLast(value);
}
HistoryReadRequest request = new HistoryReadRequest();
request.Values = values;
request.NumValuesPerNode = 0;
request.Filter = null;
return request;
}
