org.jboss.ejb.plugins
Class NoPassivationCachePolicy

java.lang.Object
  |
  +--org.jboss.ejb.plugins.NoPassivationCachePolicy

All Implemented Interfaces:

CachePolicy, EnterpriseContextCachePolicy, Service

public class NoPassivationCachePolicy

extends java.lang.Object

implements EnterpriseContextCachePolicy

Implementation of a no passivation cache policy.

Version:

$Revision: 1.4 $

Author:

Simone Bordet (simone.bordet@compaq.com)

See Also:

AbstractInstanceCache

Inner classes inherited from class org.jboss.ejb.plugins.EnterpriseContextCachePolicy

EnterpriseContextCachePolicy.Scheduler

Fields inherited from interface org.jboss.ejb.plugins.EnterpriseContextCachePolicy

scheduler

Constructor Summary

NoPassivationCachePolicy(AbstractInstanceCache eic)
Creates a no passivation cache policy object given the instance cache that use this policy object, that btw is not used.

Method Summary

void	destroy()
void	flush() Flushes the cached objects from the cache.
java.lang.Object	get(java.lang.Object key) Returns the object paired with the specified key if it's present in the cache, otherwise must return null.
void	init()
void	insert(java.lang.Object key, java.lang.Object ctx) Inserts the specified object into the cache following the implemented policy.
java.lang.Object	peek(java.lang.Object key) Returns the object paired with the specified key if it's present in the cache, otherwise must return null.
void	remove(java.lang.Object key) Remove the cached object paired with the specified key.
void	start()
void	stop()

Methods inherited from class java.lang.Object

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

Constructor Detail

NoPassivationCachePolicy

public NoPassivationCachePolicy(AbstractInstanceCache eic)

Creates a no passivation cache policy object given the instance cache that use this policy object, that btw is not used.

Method Detail

init

public void init()
          throws java.lang.Exception

Specified by:

init in interface Service

start

public void start()
           throws java.lang.Exception

Specified by:

start in interface Service

stop

public void stop()

Specified by:

stop in interface Service

destroy

public void destroy()

Specified by:

destroy in interface Service

get

public java.lang.Object get(java.lang.Object key)

Description copied from interface: CachePolicy

Returns the object paired with the specified key if it's present in the cache, otherwise must return null.
Implementations of this method must have complexity of order O(1). Differently from CachePolicy.peek(java.lang.Object) this method not only return whether the object is present in the cache or not, but also applies the implemented policy that will "refresh" the cached object in the cache, because this cached object was really requested.

Specified by:

get in interface CachePolicy

Following copied from interface: org.jboss.util.CachePolicy

Parameters:

key - the key paired with the object

See Also:

CachePolicy.peek(java.lang.Object)

peek

public java.lang.Object peek(java.lang.Object key)

Description copied from interface: CachePolicy

Returns the object paired with the specified key if it's present in the cache, otherwise must return null.
Implementations of this method must have complexity of order O(1). This method should not apply the implemented caching policy to the object paired with the given key, so that a client can query if an object is cached without "refresh" its cache status. Real requests for the object must be done using CachePolicy.get(java.lang.Object).

Specified by:

peek in interface CachePolicy

Following copied from interface: org.jboss.util.CachePolicy

Parameters:

key - the key paired with the object

See Also:

CachePolicy.get(java.lang.Object)

insert

public void insert(java.lang.Object key,
                   java.lang.Object ctx)

Description copied from interface: CachePolicy

Inserts the specified object into the cache following the implemented policy.
Implementations of this method must have complexity of order O(1).

Specified by:

insert in interface CachePolicy

Following copied from interface: org.jboss.util.CachePolicy

Parameters:

key - the key paired with the object

object - the object to cache

See Also:

CachePolicy.remove(java.lang.Object)

remove

public void remove(java.lang.Object key)

Description copied from interface: CachePolicy

Remove the cached object paired with the specified key.
Implementations of this method must have complexity of order O(1).

Specified by:

remove in interface CachePolicy

Following copied from interface: org.jboss.util.CachePolicy

Parameters:

key - the key paired with the object

See Also:

CachePolicy.insert(java.lang.Object, java.lang.Object)

flush

public void flush()

Description copied from interface: CachePolicy

Flushes the cached objects from the cache.

Specified by:

flush in interface CachePolicy