org.eclipse.scada.hds

Class DataStoreAccesor

java.lang.Object

org.eclipse.scada.hds.AbstractValueSource

org.eclipse.scada.hds.DataStoreAccesor

All Implemented Interfaces:

ValueSource

public class DataStoreAccesor
extends AbstractValueSource

Constructor Summary

Constructors

Constructor and Description
DataStoreAccesor(java.io.File basePath, DataFilePool pool)

Method Summary

Methods

Modifier and Type	Method and Description
static DataStoreAccesor	create(java.io.File basePath, long time, java.util.concurrent.TimeUnit unit, int count, DataFilePool pool)
void	dispose()
int	getCount() Get the number of slices configured
long	getTimeSlice() Get the time slice in milliseconds
protected void	giveBack(org.eclipse.scada.hds.DataStoreAccesor.AccessorWrapper wrapper)
void	insertHeartbeat(java.util.Date date) Insert a marker that the data input mechanism was alive at the provided time
void	insertValue(double value, java.util.Date date, boolean error, boolean manual)
protected void	insertValue(double value, java.util.Date date, boolean error, boolean manual, boolean heartbeat)
void	purge() Delete data files that are out of range
protected void	take(org.eclipse.scada.hds.DataStoreAccesor.AccessorWrapper wrapper)
boolean	visit(ValueVisitor visitor, java.util.Date start, java.util.Date end) Visit values

Methods inherited from class org.eclipse.scada.hds.AbstractValueSource

addListener, notifyChange, removeListener

Methods inherited from class java.lang.Object

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

Constructor Detail

DataStoreAccesor

public DataStoreAccesor(java.io.File basePath,
                DataFilePool pool)
                 throws java.lang.Exception

Throws:

java.lang.Exception

Method Detail

getCount

public int getCount()

Get the number of slices configured

Returns:

the number of slices configured

getTimeSlice

public long getTimeSlice()

Get the time slice in milliseconds

Returns:

the time slice in milliseconds

take

protected void take(org.eclipse.scada.hds.DataStoreAccesor.AccessorWrapper wrapper)

giveBack

protected void giveBack(org.eclipse.scada.hds.DataStoreAccesor.AccessorWrapper wrapper)

insertValue

protected void insertValue(double value,
               java.util.Date date,
               boolean error,
               boolean manual,
               boolean heartbeat)
                    throws java.lang.Exception

Throws:

java.lang.Exception

insertValue

public void insertValue(double value,
               java.util.Date date,
               boolean error,
               boolean manual)
                 throws java.lang.Exception

Throws:

java.lang.Exception

insertHeartbeat

public void insertHeartbeat(java.util.Date date)
                     throws java.lang.Exception

Insert a marker that the data input mechanism was alive at the provided time

Parameters:

date - the date of the marker

Throws:

java.lang.Exception - thrown if anything goes wrong

visit

public boolean visit(ValueVisitor visitor,
            java.util.Date start,
            java.util.Date end)

Visit values

Parameters:

visitor - the visitor

start - the start range

end - the end range

Returns:

true if more should be read, false otherwise

purge

public void purge()

Delete data files that are out of range

create

public static DataStoreAccesor create(java.io.File basePath,
                      long time,
                      java.util.concurrent.TimeUnit unit,
                      int count,
                      DataFilePool pool)
                               throws java.lang.Exception

Throws:

java.lang.Exception

dispose

public void dispose()