org.codehaus.wadi.impl
Class SharedStoreContextualiser

java.lang.Object
  org.codehaus.wadi.impl.AbstractContextualiser
      org.codehaus.wadi.impl.AbstractChainedContextualiser
          org.codehaus.wadi.impl.AbstractMotingContextualiser
              org.codehaus.wadi.impl.AbstractSharedContextualiser
                  org.codehaus.wadi.impl.SharedStoreContextualiser

All Implemented Interfaces:

Contextualiser, Lifecycle

public class SharedStoreContextualiser

extends AbstractSharedContextualiser

A Contextualiser which stores its Contexts in a shared database via JDBC. On shutdown of the cluster's last node, all extant sessions will be demoted to here. On startup of the cluster's first node, all sessions stored here will be promoted upwards.

Version:

$Revision: 1430 $

Author:

Jules Gosnell

Nested Class Summary

class	SharedStoreContextualiser.SharedJDBCEmoter
class	SharedStoreContextualiser.SharedJDBCImmoter An Emoter that deals in terms of SharedJDBCMotables

Field Summary

protected Emoter	_emoter
protected Immoter	_immoter
protected DatabaseStore	_store

Fields inherited from class org.codehaus.wadi.impl.AbstractMotingContextualiser

_clean, _config, _locker

Fields inherited from class org.codehaus.wadi.impl.AbstractChainedContextualiser

_next

Fields inherited from class org.codehaus.wadi.impl.AbstractContextualiser

_log

Constructor Summary

SharedStoreContextualiser(Contextualiser next, Collapser collapser, boolean clean, DatabaseStore store)

Method Summary

boolean	contextualise(InvocationContext invocationContext, String id, Immoter immoter, Sync motionLock, boolean exclusiveOnly) Shared Contextualisers do nothing at runtime.
void	expire(Motable motable)
Motable	get(String id)
Immoter	getDemoter(String name, Motable motable) Return a Demoter to the first Contextualiser which would be happy to accept this Motable - in other words - would not evict() it.
Emoter	getEmoter()
Emoter	getEvictionEmoter()
Immoter	getImmoter()
String	getStartInfo()
void	init(ContextualiserConfig config)
void	load(Emoter emoter, Immoter immoter)

Methods inherited from class org.codehaus.wadi.impl.AbstractSharedContextualiser

getLocalSessionCount, isExclusive

Methods inherited from class org.codehaus.wadi.impl.AbstractMotingContextualiser

destroy, getPromoter, getSharedDemoter, handle, promote, promoteToExclusive

Methods inherited from class org.codehaus.wadi.impl.AbstractChainedContextualiser

findRelevantSessionNames, setLastAccessedTime, setMaxInactiveInterval, start, stop

Methods inherited from class org.codehaus.wadi.impl.AbstractContextualiser

getStopInfo

Methods inherited from class java.lang.Object

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

Field Detail

_store

protected final DatabaseStore _store

_immoter

protected final Immoter _immoter

_emoter

protected final Emoter _emoter

Constructor Detail

SharedStoreContextualiser

public SharedStoreContextualiser(Contextualiser next,
                                 Collapser collapser,
                                 boolean clean,
                                 DatabaseStore store)

Method Detail

getStartInfo

public String getStartInfo()

Overrides:

getStartInfo in class AbstractContextualiser

init

public void init(ContextualiserConfig config)

Specified by:

init in interface Contextualiser

Overrides:

init in class AbstractMotingContextualiser

getImmoter

public Immoter getImmoter()

Specified by:

getImmoter in class AbstractMotingContextualiser

Returns:

- an Immoter that facilitates insertion of Motables into this Contextualiser's own store

getEmoter

public Emoter getEmoter()

Specified by:

getEmoter in class AbstractMotingContextualiser

Returns:

- an Emoter that facilitates removal of Motables from this Contextualiser's own store

getDemoter

public Immoter getDemoter(String name,
                          Motable motable)

Description copied from interface: Contextualiser

Return a Demoter to the first Contextualiser which would be happy to accept this Motable - in other words - would not evict() it.

Specified by:

getDemoter in interface Contextualiser

Overrides:

getDemoter in class AbstractSharedContextualiser

get

public Motable get(String id)

Specified by:

get in class AbstractMotingContextualiser

load

public void load(Emoter emoter,
                 Immoter immoter)

getEvictionEmoter

public Emoter getEvictionEmoter()

expire

public void expire(Motable motable)

contextualise

public boolean contextualise(InvocationContext invocationContext,
                             String id,
                             Immoter immoter,
                             Sync motionLock,
                             boolean exclusiveOnly)
                      throws InvocationException

Shared Contextualisers do nothing at runtime. They exist only to load data at startup and store it at shutdown.

Specified by:

contextualise in interface Contextualiser

Overrides:

contextualise in class AbstractMotingContextualiser

Throws:

InvocationException