org.eclipse.scada.da.server.common.chain

Class WriteHandlerItem

java.lang.Object

org.eclipse.scada.da.server.common.DataItemBase

org.eclipse.scada.da.server.common.chain.DataItemBaseChained

org.eclipse.scada.da.server.common.chain.DataItemInputChained

org.eclipse.scada.da.server.common.chain.DataItemInputOutputChained

org.eclipse.scada.da.server.common.chain.WriteHandlerItem

All Implemented Interfaces:

DataItem

public class WriteHandlerItem
extends DataItemInputOutputChained

Field Summary

Fields inherited from class org.eclipse.scada.da.server.common.chain.DataItemInputChained

primaryValue, secondaryValue

Fields inherited from class org.eclipse.scada.da.server.common.chain.DataItemBaseChained

chain, executor, primaryAttributes, secondaryAttributes

Fields inherited from class org.eclipse.scada.da.server.common.DataItemBase

listener

Constructor Summary

Constructors

Constructor and Description
WriteHandlerItem(DataItemInformation di, WriteHandler writeHandler, java.util.concurrent.Executor executor)
WriteHandlerItem(java.lang.String itemId, WriteHandler writeHandler, java.util.concurrent.Executor executor)

Method Summary

Methods

Modifier and Type	Method and Description
void	setWriteHandler(WriteHandler writeHandler) Change the write handler
protected	startWriteCalculatedValue(Variant value, OperationParameters operationParameters)

Methods inherited from class org.eclipse.scada.da.server.common.chain.DataItemInputOutputChained

startWriteValue

Methods inherited from class org.eclipse.scada.da.server.common.chain.DataItemInputChained

getCacheAttributes, getCacheValue, process, readValue, updateData

Methods inherited from class org.eclipse.scada.da.server.common.chain.DataItemBaseChained

addChainElement, addChainElement, getAttributes, getChainCopy, handleUnhandledAttributes, processSetAttributes, removeChainElement, setChain, startSetAttributes

Methods inherited from class org.eclipse.scada.da.server.common.DataItemBase

getInformation, handleListenerChange, notifyData, notifyData, setListener

Methods inherited from class java.lang.Object

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

Constructor Detail

WriteHandlerItem

public WriteHandlerItem(DataItemInformation di,
                WriteHandler writeHandler,
                java.util.concurrent.Executor executor)

WriteHandlerItem

public WriteHandlerItem(java.lang.String itemId,
                WriteHandler writeHandler,
                java.util.concurrent.Executor executor)

Method Detail

setWriteHandler

public void setWriteHandler(WriteHandler writeHandler)

Change the write handler

The write handler will not be called for the last written value only for the next one.

Parameters:

writeHandler - the new write handler

startWriteCalculatedValue

protected  startWriteCalculatedValue(Variant value,
                              OperationParameters operationParameters)

Specified by:

startWriteCalculatedValue in class DataItemInputOutputChained