NoPassivationCachePolicy

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org.jboss.ejb.plugins
Class NoPassivationCachePolicy

java.lang.Object
  org.jboss.ejb.plugins.NoPassivationCachePolicy

All Implemented Interfaces:: CachePolicy (src) , Monitorable (src)

public class NoPassivationCachePolicy
extends java.lang.Object
implements CachePolicy (src) , Monitorable (src)

Implementation of a no passivation cache policy.

See Also:: AbstractInstanceCache (src)

Constructor Summary
`NoPassivationCachePolicy(AbstractInstanceCache (src) 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`	`create()` create the service, do expensive operations etc
`void`	`destroy()` destroy the service, tear down
`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`	`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`	`sample(java.lang.Object s)` Samples the status of the implementor object and register the status into the snapshot argument.
`int`	`size()` Get the size of the cache.
`void`	`start()` start the service, create is already called
`void`	`stop()` stop the service

Methods inherited from class java.lang.Object

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

Constructor Detail

NoPassivationCachePolicy

public NoPassivationCachePolicy(AbstractInstanceCache (src)  eic)

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

Method Detail

sample

public void sample(java.lang.Object s)

Description copied from interface: Monitorable (src)

Samples the status of the implementor object and register the status into the snapshot argument.

Specified by:: sample in interface Monitorable (src)

create

public void create()
            throws java.lang.Exception

Description copied from interface: CachePolicy (src)

create the service, do expensive operations etc

Specified by:: create in interface CachePolicy (src)

Throws:: java.lang.Exception

start

public void start()
           throws java.lang.Exception

Description copied from interface: CachePolicy (src)

start the service, create is already called

Specified by:: start in interface CachePolicy (src)

Throws:: java.lang.Exception

stop

public void stop()

Description copied from interface: CachePolicy (src)

stop the service

Specified by:: stop in interface CachePolicy (src)

destroy

public void destroy()

Description copied from interface: CachePolicy (src)

destroy the service, tear down

Specified by:: destroy in interface CachePolicy (src)

get

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

Description copied from interface: CachePolicy (src)

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 (src)

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 (src)

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 (src)

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 (src)

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 (src)

Parameters:: key - the key paired with the object; ctx - the object to cache
See Also:: CachePolicy.remove(java.lang.Object)

remove

public void remove(java.lang.Object key)

Description copied from interface: CachePolicy (src)

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 (src)

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 (src)

Flushes the cached objects from the cache.

Specified by:: flush in interface CachePolicy (src)

size

public int size()

Description copied from interface: CachePolicy (src)

Get the size of the cache.

Specified by:: size in interface CachePolicy (src)

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