Package net.rubyeye.xmemcached.impl

Class LibmemcachedMemcachedSessionLocator

java.lang.Object

net.rubyeye.xmemcached.impl.AbstractMemcachedSessionLocator

net.rubyeye.xmemcached.impl.LibmemcachedMemcachedSessionLocator

All Implemented Interfaces:

MemcachedSessionLocator

public class LibmemcachedMemcachedSessionLocator
extends AbstractMemcachedSessionLocator

Consistent Hash Algorithm implementation is compatible with libmemcached method.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static int	DEFAULT_NUM_REPS
private HashAlgorithm	hashAlgorithm
private java.util.TreeMap<java.lang.Long,java.util.List<Session>>	ketamaSessions
private int	maxTries
private int	numReps
private java.util.Random	random

Fields inherited from class net.rubyeye.xmemcached.impl.AbstractMemcachedSessionLocator

failureMode

Constructor Summary

Constructors

Constructor	Description
LibmemcachedMemcachedSessionLocator()
LibmemcachedMemcachedSessionLocator(int numReps, HashAlgorithm hashAlgorithm)

Method Summary

Modifier and Type	Method	Description
private void	buildMap(java.util.Collection<Session> list, HashAlgorithm alg)
Session	getSessionByHash(long hash)
Session	getSessionByKey(java.lang.String key)	Returns a session by special key.
private java.util.List<Session>	getSessionList(java.util.TreeMap<java.lang.Long,java.util.List<Session>> sessionMap, long k)
long	nextHash(long hashVal, java.lang.String key, int tries)
void	updateSessions(java.util.Collection<Session> list)	Update sessions when session was added or removed.

Methods inherited from class net.rubyeye.xmemcached.impl.AbstractMemcachedSessionLocator

setFailureMode

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_NUM_REPS

static final int DEFAULT_NUM_REPS

See Also:

Constant Field Values

ketamaSessions

private transient volatile java.util.TreeMap<java.lang.Long,java.util.List<Session>> ketamaSessions

maxTries

private int maxTries

numReps

private int numReps

random

private final java.util.Random random

hashAlgorithm

private HashAlgorithm hashAlgorithm

Constructor Detail

LibmemcachedMemcachedSessionLocator

public LibmemcachedMemcachedSessionLocator()

LibmemcachedMemcachedSessionLocator

public LibmemcachedMemcachedSessionLocator(int numReps,
                                           HashAlgorithm hashAlgorithm)

Method Detail

buildMap

private final void buildMap(java.util.Collection<Session> list,
                            HashAlgorithm alg)

getSessionList

private java.util.List<Session> getSessionList(java.util.TreeMap<java.lang.Long,java.util.List<Session>> sessionMap,
                                               long k)

getSessionByKey

public final Session getSessionByKey(java.lang.String key)

Description copied from interface: MemcachedSessionLocator

Returns a session by special key.

Returns:

getSessionByHash

public final Session getSessionByHash(long hash)

nextHash

public final long nextHash(long hashVal,
                           java.lang.String key,
                           int tries)

updateSessions

public final void updateSessions(java.util.Collection<Session> list)

Description copied from interface: MemcachedSessionLocator

Update sessions when session was added or removed.

Parameters:

list - The newer sessions