Package org.shredzone.geordi.service

Class CompactingServiceImpl

java.lang.Object

org.shredzone.geordi.service.CompactingServiceImpl

All Implemented Interfaces:

CompactingService

@Singleton
public class CompactingServiceImpl
extends Object
implements CompactingService

Implementation of CompactingService. It stores the last sample value in a hash map. This implementation is threadsafe.

Constructor Summary

Constructors

Constructor	Description
CompactingServiceImpl()

Method Summary

Modifier and Type	Method	Description
Sample	lastUnchanged(Sample sample)	Regenerates the last unchanged Sample before the value has changed.
void	rememberSample(Sample sample)	Remember a Sample value.
boolean	wasUnchanged(Sample sample)	Checks if the given Sample can be compacted.

Methods inherited from class java.lang.Object

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

Constructor Details

CompactingServiceImpl

public CompactingServiceImpl()

Method Details

wasUnchanged

public boolean wasUnchanged(Sample sample)

Description copied from interface: CompactingService

Checks if the given Sample can be compacted.

Specified by:

wasUnchanged in interface CompactingService

Parameters:

sample - Sample to check

Returns:

true if the corresponding sensor is in compact mode, and the sample's value is equal to the previously stored sensor value.

lastUnchanged

public Sample lastUnchanged(Sample sample)

Description copied from interface: CompactingService

Regenerates the last unchanged Sample before the value has changed. This way, interpolations can start from the timestamp of the last unchanged value, instead of the first unchanged value.

Specified by:

lastUnchanged in interface CompactingService

Parameters:

sample - Sample to regenerate the last unchanged sample for

Returns:

Regenerated Sample, or null if there was no last sample that could be generated

rememberSample

public void rememberSample(Sample sample)

Description copied from interface: CompactingService

Remember a Sample value.

Specified by:

rememberSample in interface CompactingService

Parameters:

sample - Sample to remember