org.rrd4j.core
Class ArcState

java.lang.Object
  org.rrd4j.core.ArcState

public class ArcState
extends Object

Class to represent internal RRD archive state for a single datasource. Objects of this class are never manipulated directly, it's up to Rrd4j to manage internal archive states.

Author:

Sasa Markovic

Method Summary

void	copyStateTo(org.rrd4j.core.RrdUpdater other) Copies object's internal state to another ArcState object.
double	getAccumValue() Returns the value accumulated so far.
long	getNanSteps() Returns the number of currently accumulated NaN steps.
Archive	getParent() Returns the Archive object to which this ArcState object belongs.
org.rrd4j.core.RrdAllocator	getRrdAllocator() Required to implement RrdUpdater interface.
RrdBackend	getRrdBackend() Returns the underlying storage (backend) object which actually performs all I/O operations.

Methods inherited from class java.lang.Object

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

Method Detail

getNanSteps

public long getNanSteps()
                 throws IOException

Returns the number of currently accumulated NaN steps.

Returns:

Number of currently accumulated NaN steps.

Throws:

IOException - Thrown in case of I/O error

getAccumValue

public double getAccumValue()
                     throws IOException

Returns the value accumulated so far.

Returns:

Accumulated value

Throws:

IOException - Thrown in case of I/O error

getParent

public Archive getParent()

Returns the Archive object to which this ArcState object belongs.

Returns:

Parent Archive object.

copyStateTo

public void copyStateTo(org.rrd4j.core.RrdUpdater other)
                 throws IOException

Copies object's internal state to another ArcState object.

Parameters:

other - New ArcState object to copy state to

Throws:

IOException - Thrown in case of I/O error

getRrdBackend

public RrdBackend getRrdBackend()

Returns the underlying storage (backend) object which actually performs all I/O operations.

Returns:

I/O backend object

getRrdAllocator

public org.rrd4j.core.RrdAllocator getRrdAllocator()

Required to implement RrdUpdater interface. You should never call this method directly.

Returns:

Allocator object