org.eclipse.scada.da.datasource.script

Class ScriptDataSource

java.lang.Object

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

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

org.eclipse.scada.da.datasource.script.ScriptDataSource

All Implemented Interfaces:

DataSource

public class ScriptDataSource
extends AbstractMultiSourceDataSource

Field Summary

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

DATA_SOURCE_ID

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
protected WriteAttributeResults	convertAttributeResult(Map<String,Variant> attributes, Object result)
protected WriteResult	convertValueResult(Object result)
void	dispose()
protected void	executeScript(ScriptExecutor command)
protected Executor	getExecutor() Return the executor to use for sending out events
protected void	handleChange(Map<String,DataSourceHandler> sources) Handle data change
protected void	handleTimer()
protected Object	performScript(ScriptExecutor command, ScriptContext scriptContext)
protected Object	performWrite(ScriptExecutor command, Variant value, Map<String,Variant> attributes, OperationParameters operationParameters)
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, 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

ScriptDataSource

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

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

performWrite

protected Object performWrite(ScriptExecutor command,
                              Variant value,
                              Map<String,Variant> attributes,
                              OperationParameters operationParameters)
                       throws Exception

Throws:

Exception

startWriteAttributes

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

convertAttributeResult

protected WriteAttributeResults convertAttributeResult(Map<String,Variant> attributes,
                                                       Object result)

convertValueResult

protected WriteResult convertValueResult(Object result)

startWriteValue

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

update

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

Throws:

Exception

dispose

public void dispose()

Overrides:

dispose in class AbstractMultiSourceDataSource

handleTimer

protected void handleTimer()

handleChange

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

Handle data change

Specified by:

handleChange in class AbstractMultiSourceDataSource

performScript

protected Object performScript(ScriptExecutor command,
                               ScriptContext scriptContext)
                        throws Exception

Throws:

Exception

executeScript

protected void executeScript(ScriptExecutor command)