org.eclipse.scada.da.datasource.delta

Class DeltaDataSource

java.lang.Object

org.eclipse.scada.da.datasource.base.AbstractDataSource

org.eclipse.scada.da.datasource.base.AbstractDataSourceHandler

org.eclipse.scada.da.datasource.delta.DeltaDataSource

All Implemented Interfaces:

DataSource

public class DeltaDataSource
extends AbstractDataSourceHandler

Field Summary

Fields inherited from interface org.eclipse.scada.da.datasource.DataSource

DATA_SOURCE_ID

Constructor Summary

Constructors

Constructor and Description
DeltaDataSource(Executor executor, ObjectPoolTracker<DataSource> tracker)

Method Summary

Methods

Modifier and Type	Method and Description
protected Executor	getExecutor() Return the executor to use for sending out events
NotifyFuture<WriteAttributeResults>	startWriteAttributes(Map<String,Variant> attributes, OperationParameters operationParameters)
NotifyFuture<WriteResult>	startWriteValue(Variant value, OperationParameters operationParameters)
protected void	stateChanged(DataItemValue value)
void	update(Map<String,String> parameters)

Methods inherited from class org.eclipse.scada.da.datasource.base.AbstractDataSourceHandler

dispose, getDataSource, setDataSource, setDataSource

Methods inherited from class org.eclipse.scada.da.datasource.base.AbstractDataSource

addListener, removeListener, updateData

Methods inherited from class java.lang.Object

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

Constructor Detail

DeltaDataSource

public DeltaDataSource(Executor executor,
               ObjectPoolTracker<DataSource> tracker)

Method Detail

getExecutor

protected Executor getExecutor()

Description copied from class: AbstractDataSource

Return the executor to use for sending out events

Specified by:

getExecutor in class AbstractDataSource

Returns:

the executor to use, must never be null

startWriteAttributes

public NotifyFuture<WriteAttributeResults> startWriteAttributes(Map<String,Variant> attributes,
                                                       OperationParameters operationParameters)

startWriteValue

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

update

public void update(Map<String,String> parameters)
            throws Exception

Throws:

Exception

stateChanged

protected void stateChanged(DataItemValue value)

Specified by:

stateChanged in class AbstractDataSourceHandler