org.eclipse.scada.da.server.common

Interface SuspendableDataItem

All Known Implementing Classes:

DataItemOutputChained, PlainFileDataItem, ScheduledDataItem, SuspendItem, TimeDataItem

public interface SuspendableDataItem

An interface for items that are interested if currently a listener is set or not.
Note that this interface must be fed by someone. It is not automatically fed by the Hive anymore since the item should take care itself of this state. See DataItemBase for a class supporting this interface.

Author:

Jens Reimann <jens.reimann@th4-systems.com>

See Also:

DataItemBase

Method Summary

Methods

Modifier and Type	Method and Description
void	suspend() Called when the listener is set from a valid listener to null
void	wakeup() Called when the listener is set from null to a valid listener

Method Detail

suspend

void suspend()

Called when the listener is set from a valid listener to null

wakeup

void wakeup()

Called when the listener is set from null to a valid listener