Package com.inductiveautomation.ignition.gateway.opc

Interface OpcSubscriptionNode

  • All Superinterfaces:
    java.io.Serializable
    public interface OpcSubscriptionNode
extends java.io.Serializable
    An object that provides the information needed to subscribe to a node (the NodeSubscriptionDefinition), and receives the QualifiedValue when the subscribed node changes.

    • Method Detail

      • getNodeSubscriptionDefinition

        NodeSubscriptionDefinition getNodeSubscriptionDefinition()
        Retrieves the node subscription definition of what this node wants to subscribe to

      • getServerNodeId

        default ServerNodeId getServerNodeId()
        Returns:
        this Node's ServerNodeId; the name of the OPC server it belongs to and its NodeId.

      • getServerName

        default java.lang.String getServerName()

      • getNodeId

        default java.lang.String getNodeId()

      • getSubscriptionName

        default java.lang.String getSubscriptionName()
        Returns:
        the logical name of the subscription this Node belongs to.

      • setValue

        void setValue​(QualifiedValue value)
        Sets a new value for this subscribable node. This function can be called at any time, regardless of the nodes defined subscription rate. For example, if a driver provides a buffer of data, it can call this function for each value. Other settings in the system will dictate how the values are handled, such as whether each value is processed, or only the latest, after a period of time.

      • setQuality

        void setQuality​(QualityCode quality)
        Sets only the quality. It is expected that the quality and timestamp will be updated, but the value will remain unchanged

      • getLastSubscriptionValue

        QualifiedValue getLastSubscriptionValue()
        Retrieve the last value set by setValue(QualifiedValue) (possibly modified by a call to setQuality(StatusCode). Used by the SubscriptionModel to feed the OPC status pane for diagnostic purposes.