org.eclipse.scada.hd.server.storage.common

Class QueryImpl

java.lang.Object

org.eclipse.scada.hd.server.storage.common.QueryImpl

All Implemented Interfaces:

Query

public class QueryImpl
extends Object
implements Query

Constructor Summary

Constructors

Constructor and Description
QueryImpl(ValueSourceManager storage, ScheduledExecutorService executor, ScheduledExecutorService eventExecutor, QueryParameters parameters, QueryListener listener, boolean updateData, Date fixedStartDate, Date fixedEndDate) Create a new common query

Method Summary

Modifier and Type	Method and Description
void	changeParameters(QueryParameters parameters) Request a change of parameters
void	changeParameters(QueryParameters parameters, boolean force)
void	close() Close the query
void	dataChanged(Date start, Date end)
boolean	isUpdateData()
protected void	performLoad()
void	reload()
protected boolean	shouldContinue(QueryParameters queryParameters) Should the current loading continue
void	updateData(double value, Date timestamp, boolean error, boolean manual)

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryImpl

public QueryImpl(ValueSourceManager storage,
                 ScheduledExecutorService executor,
                 ScheduledExecutorService eventExecutor,
                 QueryParameters parameters,
                 QueryListener listener,
                 boolean updateData,
                 Date fixedStartDate,
                 Date fixedEndDate)

Create a new common query

Parameters:

storage - the value source manager

executor - a single threaded executor for posting events

eventExecutor -

parameters - the initial query parameters

listener - the query listener, must not be null

updateData - request data updates

fixedStartDate - an optional fixed start date before which all query data is invalid

fixedEndDate - an optional fixed end date after which all query data is invalid

Method Detail

close

public void close()

Description copied from interface: Query

Close the query

Specified by:

close in interface Query

changeParameters

public void changeParameters(QueryParameters parameters)

Description copied from interface: Query

Request a change of parameters

Specified by:

changeParameters in interface Query

Parameters:

parameters - the new requested parameters

changeParameters

public void changeParameters(QueryParameters parameters,
                             boolean force)

reload

public void reload()

performLoad

protected void performLoad()

shouldContinue

protected boolean shouldContinue(QueryParameters queryParameters)

Should the current loading continue

Parameters:

queryParameters -

Returns:

isUpdateData

public boolean isUpdateData()

updateData

public void updateData(double value,
                       Date timestamp,
                       boolean error,
                       boolean manual)

dataChanged

public void dataChanged(Date start,
                        Date end)