org.eclipse.scada.da.server.proxy.item

Class ProxyItemUpdateListener

java.lang.Object

org.eclipse.scada.da.server.proxy.item.ProxyItemUpdateListener

All Implemented Interfaces:

ItemUpdateListener

public class ProxyItemUpdateListener
extends java.lang.Object
implements ItemUpdateListener

Constructor Summary

Constructors

Constructor and Description
ProxyItemUpdateListener(java.util.concurrent.Executor executor, ProxyDataItem item, ProxySubConnection subConnection)

Method Summary

Methods

Modifier and Type	Method and Description
void	notifyDataChange(Variant value, java.util.Map<java.lang.String,Variant> attributes, boolean cache) A change on the data item occurred.
void	notifySubscriptionChange(SubscriptionState subscriptionState, java.lang.Throwable subscriptionError) Notify a change in the subscription change

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ProxyItemUpdateListener

public ProxyItemUpdateListener(java.util.concurrent.Executor executor,
                       ProxyDataItem item,
                       ProxySubConnection subConnection)

Method Detail

notifyDataChange

public void notifyDataChange(Variant value,
                    java.util.Map<java.lang.String,Variant> attributes,
                    boolean cache)

Description copied from interface: ItemUpdateListener

A change on the data item occurred.

Specified by:

notifyDataChange in interface ItemUpdateListener

Parameters:

value - The new value, or null if the value did not change

attributes - The attributes that changed, may be null if no attribute change at all. The must be unmodifiable by the receiver

cache - Indicating that the change came from the cache, this means that the change was not triggered by a device and that all attribute where sent, not only the changed ones

notifySubscriptionChange

public void notifySubscriptionChange(SubscriptionState subscriptionState,
                            java.lang.Throwable subscriptionError)

Description copied from interface: ItemUpdateListener

Notify a change in the subscription change

Specified by:

notifySubscriptionChange in interface ItemUpdateListener

Parameters:

subscriptionState - the new subscription change

subscriptionError - the new subscription error or null if everything is ok