/// <summary>
/// Creates a new set of monitored items for a set of variables.
/// </summary>
/// <remarks>
/// This method only handles data change subscriptions. Event subscriptions are created by the SDK.
/// </remarks>
public virtual void CreateMonitoredItems(
OperationContext context,
uint subscriptionId,
double publishingInterval,
TimestampsToReturn timestampsToReturn,
IList<MonitoredItemCreateRequest> itemsToCreate,
IList<ServiceResult> errors,
IList<MonitoringFilterResult> filterErrors,
IList<IMonitoredItem> monitoredItems,
ref long globalIdCounter)
{
ServerSystemContext systemContext = m_systemContext.Copy(context);
IDictionary<NodeId,NodeState> operationCache = new NodeIdDictionary<NodeState>();
List<ReadWriteOperationState> nodesToValidate = new List<ReadWriteOperationState>();
lock (Lock)
{
for (int ii = 0; ii < itemsToCreate.Count; ii++)
{
MonitoredItemCreateRequest itemToCreate = itemsToCreate[ii];
// skip items that have already been processed.
if (itemToCreate.Processed)
{
continue;
}
ReadValueId itemToMonitor = itemToCreate.ItemToMonitor;
// check for valid handle.
NodeState source = GetManagerHandle(systemContext, itemToMonitor.NodeId, operationCache) as NodeState;
if (source == null)
{
continue;
}
// owned by this node manager.
itemToCreate.Processed = true;
// check if the node is ready for reading.
if (source.ValidationRequired)
{
errors[ii] = StatusCodes.BadNodeIdUnknown;
// must validate node in a seperate operation.
ReadWriteOperationState operation = new ReadWriteOperationState();
operation.Source = source;
operation.Index = ii;
nodesToValidate.Add(operation);
continue;
}
MonitoringFilterResult filterError = null;
IMonitoredItem monitoredItem = null;
errors[ii] = CreateMonitoredItem(
systemContext,
source,
subscriptionId,
publishingInterval,
context.DiagnosticsMask,
timestampsToReturn,
itemToCreate,
ref globalIdCounter,
out filterError,
out monitoredItem);
// save any filter error details.
filterErrors[ii] = filterError;
if (ServiceResult.IsBad(errors[ii]))
{
continue;
}
// save the monitored item.
monitoredItems[ii] = monitoredItem;
}
// check for nothing to do.
if (nodesToValidate.Count == 0)
{
return;
}
// validates the nodes (reads values from the underlying data source if required).
for (int ii = 0; ii < nodesToValidate.Count; ii++)
{
ReadWriteOperationState operation = nodesToValidate[ii];
// validate the object.
if (!ValidateNode(systemContext, operation.Source))
{
continue;
}
MonitoredItemCreateRequest itemToCreate = itemsToCreate[operation.Index];
MonitoringFilterResult filterError = null;
IMonitoredItem monitoredItem = null;
errors[operation.Index] = CreateMonitoredItem(
systemContext,
operation.Source,
subscriptionId,
publishingInterval,
context.DiagnosticsMask,
timestampsToReturn,
itemToCreate,
ref globalIdCounter,
out filterError,
out monitoredItem);
// save any filter error details.
filterErrors[operation.Index] = filterError;
if (ServiceResult.IsBad(errors[operation.Index]))
{
continue;
}
// save the monitored item.
monitoredItems[operation.Index] = monitoredItem;
}
}
}
/// <summary>
/// Updates the history for the specified nodes.
/// </summary>
public virtual void HistoryUpdate(
OperationContext context,
Type detailsType,
IList<HistoryUpdateDetails> nodesToUpdate,
IList<HistoryUpdateResult> results,
IList<ServiceResult> errors)
{
ServerSystemContext systemContext = m_systemContext.Copy(context);
IDictionary<NodeId,NodeState> operationCache = new NodeIdDictionary<NodeState>();
List<ReadWriteOperationState> nodesToValidate = new List<ReadWriteOperationState>();
lock (Lock)
{
for (int ii = 0; ii < nodesToUpdate.Count; ii++)
{
HistoryUpdateDetails nodeToUpdate = nodesToUpdate[ii];
// skip items that have already been processed.
if (nodeToUpdate.Processed)
{
continue;
}
// check for valid handle.
NodeState source = GetManagerHandle(systemContext, nodeToUpdate.NodeId, operationCache) as NodeState;
if (source == null)
{
continue;
}
// owned by this node manager.
nodeToUpdate.Processed = true;
// check if the node is ready for reading.
if (source.ValidationRequired)
{
errors[ii] = StatusCodes.BadNodeIdUnknown;
// must validate node in a seperate operation.
ReadWriteOperationState operation = new ReadWriteOperationState();
operation.Source = source;
operation.Index = ii;
nodesToValidate.Add(operation);
continue;
}
// historical data not available.
errors[ii] = StatusCodes.BadHistoryOperationUnsupported;
}
// check for nothing to do.
if (nodesToValidate.Count == 0)
{
return;
}
// validates the nodes (reads values from the underlying data source if required).
for (int ii = 0; ii < nodesToValidate.Count; ii++)
{
ReadWriteOperationState operation = nodesToValidate[ii];
if (!ValidateNode(systemContext, operation.Source))
{
continue;
}
// historical data not available.
errors[ii] = StatusCodes.BadHistoryOperationUnsupported;
}
}
}
/// <summary>
/// Reads the history for the specified nodes.
/// </summary>
public virtual void HistoryRead(
OperationContext context,
HistoryReadDetails details,
TimestampsToReturn timestampsToReturn,
bool releaseContinuationPoints,
IList<HistoryReadValueId> nodesToRead,
IList<HistoryReadResult> results,
IList<ServiceResult> errors)
{
ServerSystemContext systemContext = m_systemContext.Copy(context);
IDictionary<NodeId,NodeState> operationCache = new NodeIdDictionary<NodeState>();
List<ReadWriteOperationState> nodesToValidate = new List<ReadWriteOperationState>();
List<ReadWriteOperationState> readsToComplete = new List<ReadWriteOperationState>();
lock (Lock)
{
for (int ii = 0; ii < nodesToRead.Count; ii++)
{
HistoryReadValueId nodeToRead = nodesToRead[ii];
// skip items that have already been processed.
if (nodeToRead.Processed)
{
continue;
}
// check for valid handle.
NodeState source = GetManagerHandle(systemContext, nodeToRead.NodeId, operationCache) as NodeState;
if (source == null)
{
continue;
}
// owned by this node manager.
nodeToRead.Processed = true;
// only variables supported.
BaseVariableState variable = source as BaseVariableState;
if (variable == null)
{
errors[ii] = StatusCodes.BadHistoryOperationUnsupported;
continue;
}
results[ii] = new HistoryReadResult();
ReadWriteOperationState operation = new ReadWriteOperationState();
operation.Source = source;
operation.Index = ii;
// check if the node is ready for reading.
if (source.ValidationRequired)
{
// must validate node in a seperate operation.
errors[ii] = StatusCodes.BadNodeIdUnknown;
nodesToValidate.Add(operation);
continue;
}
// read the data.
readsToComplete.Add(operation);
}
// validates the nodes (reads values from the underlying data source if required).
for (int ii = 0; ii < nodesToValidate.Count; ii++)
{
ReadWriteOperationState operation = nodesToValidate[ii];
if (!ValidateNode(systemContext, operation.Source))
{
continue;
}
readsToComplete.Add(operation);
}
}
// reads the data without holding onto the lock.
for (int ii = 0; ii < readsToComplete.Count; ii++)
{
ReadWriteOperationState operation = readsToComplete[ii];
errors[operation.Index] = HistoryRead(
systemContext,
operation.Source,
details,
timestampsToReturn,
releaseContinuationPoints,
nodesToRead[operation.Index],
results[operation.Index]);
}
}
/// <summary>
/// Writes the value for the specified attributes.
/// </summary>
public virtual void Write(
OperationContext context,
IList<WriteValue> nodesToWrite,
IList<ServiceResult> errors)
{
ServerSystemContext systemContext = m_systemContext.Copy(context);
IDictionary<NodeId,NodeState> operationCache = new NodeIdDictionary<NodeState>();
List<ReadWriteOperationState> nodesToValidate = new List<ReadWriteOperationState>();
lock (Lock)
{
for (int ii = 0; ii < nodesToWrite.Count; ii++)
{
WriteValue nodeToWrite = nodesToWrite[ii];
// skip items that have already been processed.
if (nodeToWrite.Processed)
{
continue;
}
// check for valid handle.
NodeState source = GetManagerHandle(systemContext, nodeToWrite.NodeId, operationCache) as NodeState;
if (source == null)
{
continue;
}
// owned by this node manager.
nodeToWrite.Processed = true;
// index range is not supported.
if (!String.IsNullOrEmpty(nodeToWrite.IndexRange))
{
errors[ii] = StatusCodes.BadIndexRangeInvalid;
continue;
}
// check if the node is ready for reading.
if (source.ValidationRequired)
{
errors[ii] = StatusCodes.BadNodeIdUnknown;
// must validate node in a seperate operation.
ReadWriteOperationState operation = new ReadWriteOperationState();
operation.Source = source;
operation.Index = ii;
nodesToValidate.Add(operation);
continue;
}
// write the attribute value.
errors[ii] = source.WriteAttribute(
systemContext,
nodeToWrite.AttributeId,
nodeToWrite.ParsedIndexRange,
nodeToWrite.Value);
// updates to source finished - report changes to monitored items.
source.ClearChangeMasks(systemContext, false);
}
// check for nothing to do.
if (nodesToValidate.Count == 0)
{
return;
}
// validates the nodes (reads values from the underlying data source if required).
for (int ii = 0; ii < nodesToValidate.Count; ii++)
{
ReadWriteOperationState operation = nodesToValidate[ii];
if (!ValidateNode(systemContext, operation.Source))
{
continue;
}
WriteValue nodeToWrite = nodesToWrite[operation.Index];
// write the attribute value.
errors[operation.Index] = operation.Source.WriteAttribute(
systemContext,
nodeToWrite.AttributeId,
nodeToWrite.ParsedIndexRange,
nodeToWrite.Value);
// updates to source finished - report changes to monitored items.
operation.Source.ClearChangeMasks(systemContext, false);
}
}
}
/// <summary>
/// Reads the value for the specified attribute.
/// </summary>
public virtual void Read(
OperationContext context,
double maxAge,
IList<ReadValueId> nodesToRead,
IList<DataValue> values,
IList<ServiceResult> errors)
{
ServerSystemContext systemContext = m_systemContext.Copy(context);
IDictionary<NodeId,NodeState> operationCache = new NodeIdDictionary<NodeState>();
List<ReadWriteOperationState> nodesToValidate = new List<ReadWriteOperationState>();
lock (Lock)
{
for (int ii = 0; ii < nodesToRead.Count; ii++)
{
ReadValueId nodeToRead = nodesToRead[ii];
// skip items that have already been processed.
if (nodeToRead.Processed)
{
continue;
}
// check for valid handle.
NodeState source = GetManagerHandle(systemContext, nodeToRead.NodeId, operationCache) as NodeState;
if (source == null)
{
continue;
}
// owned by this node manager.
nodeToRead.Processed = true;
// create an initial value.
DataValue value = values[ii] = new DataValue();
value.Value = null;
value.ServerTimestamp = DateTime.UtcNow;
value.SourceTimestamp = DateTime.MinValue;
value.StatusCode = StatusCodes.Good;
// check if the node is ready for reading.
if (source.ValidationRequired)
{
errors[ii] = StatusCodes.BadNodeIdUnknown;
// must validate node in a seperate operation.
ReadWriteOperationState operation = new ReadWriteOperationState();
operation.Source = source;
operation.Index = ii;
nodesToValidate.Add(operation);
continue;
}
// read the attribute value.
errors[ii] = source.ReadAttribute(
systemContext,
nodeToRead.AttributeId,
nodeToRead.ParsedIndexRange,
nodeToRead.DataEncoding,
value);
}
// check for nothing to do.
if (nodesToValidate.Count == 0)
{
return;
}
// validates the nodes (reads values from the underlying data source if required).
for (int ii = 0; ii < nodesToValidate.Count; ii++)
{
ReadWriteOperationState operation = nodesToValidate[ii];
if (!ValidateNode(systemContext, operation.Source))
{
continue;
}
ReadValueId nodeToRead = nodesToRead[operation.Index];
DataValue value = values[operation.Index];
// update the attribute value.
errors[operation.Index] = operation.Source.ReadAttribute(
systemContext,
nodeToRead.AttributeId,
nodeToRead.ParsedIndexRange,
nodeToRead.DataEncoding,
value);
}
}
}
