org.eclipse.scada.da.datasource.formula

Class FormulaDataSource

java.lang.Object

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

org.eclipse.scada.da.datasource.base.AbstractMultiSourceDataSource

org.eclipse.scada.da.datasource.formula.FormulaDataSource

All Implemented Interfaces:

DataSource

public class FormulaDataSource
extends AbstractMultiSourceDataSource

A datasource that calculates based on input and/or output formula

Author:

Jens Reimann

Field Summary

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

DATA_SOURCE_ID

Constructor Summary

Constructors

Constructor and Description
FormulaDataSource(org.osgi.framework.BundleContext context, ObjectPoolTracker<DataSource> poolTracker, ScheduledExecutorService executor)

Method Summary

Modifier and Type	Method and Description
protected Object	executeScript(String command, CompiledScript compiledScript)
protected void	executeScript(String command, CompiledScript compiledScript, Map<String,Integer> flags)
protected Executor	getExecutor() Return the executor to use for sending out events
protected void	handleChange(Map<String,DataSourceHandler> sources) Handle data change
protected NotifyFuture<WriteResult>	processWrite(Variant writeValue, OperationParameters operationParameters)
protected void	setOutputDataSource(DataSource dataSource)
protected void	setOutputDataSource(String dataSourceId)
NotifyFuture<WriteAttributeResults>	startWriteAttributes(Map<String,Variant> attributes, OperationParameters operationParameters)
NotifyFuture<WriteResult>	startWriteValue(Variant value, OperationParameters operationParameters)
void	update(Map<String,String> parameters)

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

addDataSource, clearSources, dispose, getSourcesCopy, getType, setDataSources

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

FormulaDataSource

public FormulaDataSource(org.osgi.framework.BundleContext context,
                         ObjectPoolTracker<DataSource> poolTracker,
                         ScheduledExecutorService executor)

Method Detail

setOutputDataSource

protected void setOutputDataSource(DataSource dataSource)

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)

processWrite

protected NotifyFuture<WriteResult> processWrite(Variant writeValue,
                                                 OperationParameters operationParameters)
                                          throws Exception

Throws:

Exception

update

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

Throws:

Exception

handleChange

protected void handleChange(Map<String,DataSourceHandler> sources)

Handle data change

Specified by:

handleChange in class AbstractMultiSourceDataSource

executeScript

protected Object executeScript(String command,
                               CompiledScript compiledScript)
                        throws ScriptException

Throws:

ScriptException

executeScript

protected void executeScript(String command,
                             CompiledScript compiledScript,
                             Map<String,Integer> flags)
                      throws Exception

Throws:

Exception

setOutputDataSource

protected void setOutputDataSource(String dataSourceId)
                            throws org.osgi.framework.InvalidSyntaxException

Throws:

org.osgi.framework.InvalidSyntaxException