Interface ICompactBackend

Readonlynamespaces

browse

• browse(
      context: ISessionContext | null,
      description: BrowseDescription,
  ): Promise<BrowseResult>

  Parameters

  • context: ISessionContext | null
  • description: BrowseDescription

  Returns Promise<BrowseResult>

Optionalcall

• call?(
      context: ISessionContext | null,
      request: CallMethodRequest,
  ): Promise<CallMethodResultOptions>

  a call of a Method of these namespaces

  Parameters

  • context: ISessionContext | null
  • request: CallMethodRequest

  Returns Promise<CallMethodResultOptions>

OptionalfindNode

• findNode?(nodeId: NodeIdLike): FoundNode | null

  the node a monitored item watches; undefined where monitored items are not served yet

  Parameters

  • nodeId: NodeIdLike

  Returns FoundNode | null

OptionalhistoryRead

• historyRead?(
      context: ISessionContext,
      nodeToRead: HistoryReadValueId,
      historyReadDetails: HistoryReadDetails,
      continuationData: ContinuationData,
  ): Promise<HistoryReadResult>

  a HistoryRead of a Variable of these namespaces

  Parameters

  • context: ISessionContext
  • nodeToRead: HistoryReadValueId
  • historyReadDetails: HistoryReadDetails
  • continuationData: ContinuationData

  Returns Promise<HistoryReadResult>

read

• read(
      context: ISessionContext | null,
      nodeToRead: ReadValueIdOptions,
      maxAge: number,
      timestampsToReturn?: TimestampsToReturn,
  ): DataValue

  one item of a Read, synchronously

  Parameters

  • context: ISessionContext | null
  • nodeToRead: ReadValueIdOptions
  • maxAge: number
  • OptionaltimestampsToReturn: TimestampsToReturn

  Returns DataValue

references

• references(
      context: ISessionContext | null,
      nodeId: NodeId,
      description: BrowseDescription,
  ): Promise<ReferenceDescription[]>

  the references these namespaces add to a node of another namespace (a folder of the base namespace)

  Parameters

  • context: ISessionContext | null
  • nodeId: NodeId
  • description: BrowseDescription

  Returns Promise<ReferenceDescription[]>

translate

• translate(browsePath: BrowsePath): Promise<BrowsePathResult | null>

  a path followed in these namespaces from its start; null when it leads nowhere here

  Parameters

  • browsePath: BrowsePath

  Returns Promise<BrowsePathResult | null>

write

• write(
      context: ISessionContext | null,
      nodesToWrite: WriteValue[],
  ): Promise<StatusCode[]>

  the items of a Write that fall in these namespaces, in their order

  Parameters

  • context: ISessionContext | null
  • nodesToWrite: WriteValue[]

  Returns Promise<StatusCode[]>