AbstractNodePropertyManager.ChangeTrackingNodeSubscription

java.lang.Object

com.inductiveautomation.ignition.gateway.tags.evaluation.subscriptions.AbstractNodePropertyManager.ChangeTrackingNodeSubscription

All Implemented Interfaces:: QualifiedValueListener, NodeSubscription

Enclosing class:: AbstractNodePropertyManager

protected static class AbstractNodePropertyManager.ChangeTrackingNodeSubscription extends Object implements NodeSubscription

A simple extension that holds the last changed value.

Constructor Summary

Constructors

Constructor

Description

ChangeTrackingNodeSubscription(NodeSubscription internal)

ChangeTrackingNodeSubscription(NodeSubscription internal, boolean includeTimestamp)
Method Summary

Modifier and Type

Method

Description

void

disconnectNode()

Should be called by the Node when it is destroyed in order to let the subscription model know that the node is no longer present.

boolean

isLeased()

Indicates that the node has at least one "heavy weight" listener.

void

valueChanged(QualifiedValue value)

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- ChangeTrackingNodeSubscription
  
  public ChangeTrackingNodeSubscription(NodeSubscription internal)
- ChangeTrackingNodeSubscription
  
  public ChangeTrackingNodeSubscription(NodeSubscription internal, boolean includeTimestamp)
Method Details
- valueChanged
  
  public void valueChanged(QualifiedValue value)
  
  Specified by:
  
  valueChanged in interface QualifiedValueListener
- disconnectNode
  
  public void disconnectNode()
  
  Description copied from interface: NodeSubscription
  
  Should be called by the Node when it is destroyed in order to let the subscription model know that the node is no longer present.
  
  Specified by:
  
  disconnectNode in interface NodeSubscription
- isLeased
  
  public boolean isLeased()
  
  Description copied from interface: NodeSubscription
  
  Indicates that the node has at least one "heavy weight" listener.
  
  Specified by:
  
  isLeased in interface NodeSubscription
  
  Returns:
  
  true if the node should be executing in its "leased" state.