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

Class DataItemInputOutputChained

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

All Implemented Interfaces:

DataItem

Direct Known Subclasses:

ArduinoDataItem, MemoryDeviceDataitem, MemoryItemChained, ProxyDataItem, WriteHandlerItem

public abstract class DataItemInputOutputChained
extends DataItemInputChained

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
DataItemInputOutputChained(DataItemInformation di, Executor executor)
DataItemInputOutputChained(String id, Executor executor)

Method Summary

Modifier and Type	Method and Description
protected abstract NotifyFuture<WriteResult>	startWriteCalculatedValue(Variant value, OperationParameters operationParameters)
NotifyFuture<WriteResult>	startWriteValue(Variant value, OperationParameters operationParameters) The write operation of a data item.

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

DataItemInputOutputChained

public DataItemInputOutputChained(DataItemInformation di,
                                  Executor executor)

DataItemInputOutputChained

public DataItemInputOutputChained(String id,
                                  Executor executor)

Method Detail

startWriteValue

public NotifyFuture<WriteResult> startWriteValue(Variant value,
                                                 OperationParameters operationParameters)

Description copied from interface: DataItem

The write operation of a data item.

Specified by:

startWriteValue in interface DataItem

Overrides:

startWriteValue in class DataItemInputChained

Parameters:

value - The value to write to the subsystem

Returns:

the future to the operation

startWriteCalculatedValue

protected abstract NotifyFuture<WriteResult> startWriteCalculatedValue(Variant value,
                                                                       OperationParameters operationParameters)