Package net.spy.memcached.util

Class DefaultKetamaNodeLocatorConfiguration

java.lang.Object

net.spy.memcached.util.DefaultKetamaNodeLocatorConfiguration

All Implemented Interfaces:

KetamaNodeLocatorConfiguration

public class DefaultKetamaNodeLocatorConfiguration
extends java.lang.Object
implements KetamaNodeLocatorConfiguration

A Default implementation of the configuration required for the KetamaNodeLocator algorithm to run.

Field Summary

Fields

Modifier and Type	Field	Description
private KetamaNodeKeyFormatter	ketamaNodeKeyFormatter
private int	numReps

Constructor Summary

Constructors

Constructor	Description
DefaultKetamaNodeLocatorConfiguration()	Create a KetamaNodeLocatorConfiguraiton with the default SPYMEMCACHED node key format
DefaultKetamaNodeLocatorConfiguration(KetamaNodeKeyFormatter nodeKeyFormatter)	Create a KetamaNodeLocatorConfiguraiton

Method Summary

Modifier and Type	Method	Description
java.lang.String	getKeyForNode(MemcachedNode node, int repetition)	Delegates to the KetamaNodeKeyFormatter
int	getNodeRepetitions()	Returns the number of discrete hashes that should be defined for each node in the continuum.

Methods inherited from class java.lang.Object

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

Field Detail

numReps

private final int numReps

See Also:

Constant Field Values

ketamaNodeKeyFormatter

private final KetamaNodeKeyFormatter ketamaNodeKeyFormatter

Constructor Detail

DefaultKetamaNodeLocatorConfiguration

public DefaultKetamaNodeLocatorConfiguration()

Create a KetamaNodeLocatorConfiguraiton with the default SPYMEMCACHED node key format

DefaultKetamaNodeLocatorConfiguration

public DefaultKetamaNodeLocatorConfiguration(KetamaNodeKeyFormatter nodeKeyFormatter)

Create a KetamaNodeLocatorConfiguraiton

Parameters:

nodeKeyFormatter - Ketama node key format, either SPYMEMCACHED or LIBMEMCACHED

Method Detail

getNodeRepetitions

public int getNodeRepetitions()

Returns the number of discrete hashes that should be defined for each node in the continuum.

Specified by:

getNodeRepetitions in interface KetamaNodeLocatorConfiguration

Returns:

NUM_REPS repetitions.

getKeyForNode

public java.lang.String getKeyForNode(MemcachedNode node,
                                      int repetition)

Delegates to the KetamaNodeKeyFormatter

Specified by:

getKeyForNode in interface KetamaNodeLocatorConfiguration

Parameters:

node - The MemcachedNode to use to form the unique identifier

repetition - The repetition number for the particular node in question (0 is the first repetition)

Returns:

The key that represents the specific repetition of the node