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

Field Summary

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

DATA_SOURCE_ID

Constructor Summary

Constructors

Constructor and Description
FormulaDataSource(BundleContext context, poolTracker, java.util.concurrent.ScheduledExecutorService executor)

Method Summary

Methods

Modifier and Type	Method and Description
protected java.lang.Object	executeScript(java.lang.String command, javax.script.CompiledScript compiledScript)
protected void	executeScript(java.lang.String command, javax.script.CompiledScript compiledScript, java.util.Map<java.lang.String,java.lang.Integer> flags)
protected java.util.concurrent.Executor	getExecutor() Return the executor to use for sending out events
protected void	handleChange(java.util.Map<java.lang.String,DataSourceHandler> sources) Handle data change
protected	processWrite(Variant writeValue, OperationParameters operationParameters)
protected void	setOutputDataSource(DataSource dataSource)
protected void	setOutputDataSource(java.lang.String dataSourceId)
	startWriteAttributes(java.util.Map<java.lang.String,Variant> attributes, OperationParameters operationParameters)
	startWriteValue(Variant value, OperationParameters operationParameters)
void	update(java.util.Map<java.lang.String,java.lang.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(BundleContext context,
                  poolTracker,
                 java.util.concurrent.ScheduledExecutorService executor)

Method Detail

setOutputDataSource

protected void setOutputDataSource(DataSource dataSource)

getExecutor

protected java.util.concurrent.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  startWriteAttributes(java.util.Map<java.lang.String,Variant> attributes,
                         OperationParameters operationParameters)

startWriteValue

public  startWriteValue(Variant value,
                    OperationParameters operationParameters)

processWrite

protected  processWrite(Variant writeValue,
                 OperationParameters operationParameters)
                      throws java.lang.Exception

Throws:

java.lang.Exception

update

public void update(java.util.Map<java.lang.String,java.lang.String> parameters)
            throws java.lang.Exception

Throws:

java.lang.Exception

handleChange

protected void handleChange(java.util.Map<java.lang.String,DataSourceHandler> sources)

Handle data change

Specified by:

handleChange in class AbstractMultiSourceDataSource

executeScript

protected java.lang.Object executeScript(java.lang.String command,
                             javax.script.CompiledScript compiledScript)
                                  throws javax.script.ScriptException

Throws:

javax.script.ScriptException

executeScript

protected void executeScript(java.lang.String command,
                 javax.script.CompiledScript compiledScript,
                 java.util.Map<java.lang.String,java.lang.Integer> flags)
                      throws java.lang.Exception

Throws:

java.lang.Exception

setOutputDataSource

protected void setOutputDataSource(java.lang.String dataSourceId)
                            throws InvalidSyntaxException

Throws:

InvalidSyntaxException