The NodeOPCUA API The NodeOPCUA API

  • API Docs for Version: 0.2.0

    • APIs

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    NodeCrawler Class

    Defined in: packages\node-opcua-client-crawler\src\node_crawler.js:54
    Module: opcua.client

    Constructor

    NodeCrawler

    (
    • session
    )

    Defined in packages\node-opcua-client-crawler\src\node_crawler.js:54

    Parameters:

    • session Object

    Methods

    _defer_browse_node

    (
    • cacheNode
    • referenceTypeId
    • actionOnBrowse
    )
    private

    Defined in packages\node-opcua-client-crawler\src\node_crawler.js:350

    perform a deferred browse instead of calling session.browse directly, this function add the request to a list so that request can be grouped and send in one single browse command to the server.

    Parameters:

    • cacheNode CacheNode
    • referenceTypeId String | ReferenceType
    • actionOnBrowse Function
      • err Error | Null
      • object CacheNode

    _defer_readNode

    (
    • nodeId
    • attributeId
    • callback
    )
    private

    Defined in packages\node-opcua-client-crawler\src\node_crawler.js:190

    request a read operation for a Node+Attribute in the future, provides a callback

    Parameters:

    • nodeId NodeId
    • attributeId AttributeId
    • callback Function
      • err Error | Null
      • dataValue String

    _emit_on_crawled

    (
    • cacheNode
    • userData
    )
    private

    Defined in packages\node-opcua-client-crawler\src\node_crawler.js:616

    Parameters:

    • cacheNode Object
    • userData Object
      • [onBrowsed=null] Function optional

    _process_single_browseResult

    (
    • _objectToBrowse
    • browseResult
    )
    private

    Defined in packages\node-opcua-client-crawler\src\node_crawler.js:402

    Parameters:

    _push_task add a task at the bottom of the queue (low priority)

    (
    • name
    • task
    )
    private

    Defined in packages\node-opcua-client-crawler\src\node_crawler.js:594

    Parameters:

    • name String
    • task Object

    _resolve_deferred_readNode

    (
    • callback
    )
    private

    Defined in packages\node-opcua-client-crawler\src\node_crawler.js:229

    perform pending read Node operation

    Parameters:

    • callback Function

    _unshift_task add a task on top of the queue (high priority)

    (
    • name
    • task
    )
    private

    Defined in packages\node-opcua-client-crawler\src\node_crawler.js:579

    Parameters:

    • name String
    • task Object

    crawl

    (
    • nodeId
    • userData
    • end_callback
    )

    Defined in packages\node-opcua-client-crawler\src\node_crawler.js:777

    Parameters:

    • nodeId NodeId
    • userData Object
      • onBrowse Function
    • end_callback Function

    withSessionAsync

    (
    • endpointUrl
    • func
    )
    Promise<>

    Defined in packages\node-opcua-client\src\opcua_client_es2017_extensions.js:6

    Parameters:

    • endpointUrl Object
    • func Function

      Async function

    Returns:

    Promise<>:

    Note: only present on node >= 8