org.apache.commons.jcs.access

Class GroupCacheAccess<K,V>

java.lang.Object

org.apache.commons.jcs.access.AbstractCacheAccess<GroupAttrName<K>,V>

org.apache.commons.jcs.access.GroupCacheAccess<K,V>

All Implemented Interfaces:

ICacheAccessManagement, IGroupCacheAccess<K,V>

public class GroupCacheAccess<K,V>
extends AbstractCacheAccess<GroupAttrName<K>,V>
implements IGroupCacheAccess<K,V>

Access for groups.

Constructor Summary

Constructors

Constructor and Description
GroupCacheAccess(CompositeCache<GroupAttrName<K>,V> cacheControl) Constructor for the GroupCacheAccess object

Method Summary

Modifier and Type	Method and Description
V	getFromGroup(K name, String group) Gets an item out of the cache that is in a specified group.
Set<K>	getGroupKeys(String group) Gets the set of keys of objects currently in the group.
Set<String>	getGroupNames() Gets the set of group names in the cache
void	invalidateGroup(String group) Invalidates a group: remove all the group members
void	putInGroup(K name, String groupName, V value) Allows the user to put an object into a group within a particular cache region.
void	putInGroup(K name, String groupName, V value, IElementAttributes attr) Allows the user to put an object into a group within a particular cache region.
void	removeFromGroup(K name, String group) Remove the item from this group in this region by this name.

Methods inherited from class org.apache.commons.jcs.access.AbstractCacheAccess

clear, dispose, freeMemoryElements, getCacheAttributes, getCacheControl, getDefaultElementAttributes, getStatistics, getStats, setCacheAttributes, setDefaultElementAttributes

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.jcs.access.behavior.ICacheAccessManagement

clear, dispose, freeMemoryElements, getCacheAttributes, getDefaultElementAttributes, getStatistics, getStats, setCacheAttributes, setDefaultElementAttributes

Constructor Detail

GroupCacheAccess

public GroupCacheAccess(CompositeCache<GroupAttrName<K>,V> cacheControl)

Constructor for the GroupCacheAccess object

Parameters:

cacheControl -

Method Detail

getFromGroup

public V getFromGroup(K name,
                      String group)

Gets an item out of the cache that is in a specified group.

Specified by:

getFromGroup in interface IGroupCacheAccess<K,V>

Parameters:

name - The key name.

group - The group name.

Returns:

The cached value, null if not found.

putInGroup

public void putInGroup(K name,
                       String groupName,
                       V value)
                throws CacheException

Allows the user to put an object into a group within a particular cache region. This method sets the object's attributes to the default for the region.

Specified by:

putInGroup in interface IGroupCacheAccess<K,V>

Parameters:

name - The key name.

groupName - The group name.

value - The object to cache

Throws:

CacheException

putInGroup

public void putInGroup(K name,
                       String groupName,
                       V value,
                       IElementAttributes attr)
                throws CacheException

Allows the user to put an object into a group within a particular cache region. This method allows the object's attributes to be individually specified.

Specified by:

putInGroup in interface IGroupCacheAccess<K,V>

Parameters:

name - The key name.

groupName - The group name.

value - The object to cache

attr - The objects attributes.

Throws:

CacheException

removeFromGroup

public void removeFromGroup(K name,
                            String group)

Description copied from interface: IGroupCacheAccess

Remove the item from this group in this region by this name.

Specified by:

removeFromGroup in interface IGroupCacheAccess<K,V>

Parameters:

name -

group -

getGroupKeys

public Set<K> getGroupKeys(String group)

Gets the set of keys of objects currently in the group.

Specified by:

getGroupKeys in interface IGroupCacheAccess<K,V>

Parameters:

group -

Returns:

A Set of keys.

getGroupNames

public Set<String> getGroupNames()

Gets the set of group names in the cache

Returns:

A Set of group names.

invalidateGroup

public void invalidateGroup(String group)

Invalidates a group: remove all the group members

Specified by:

invalidateGroup in interface IGroupCacheAccess<K,V>

Parameters:

group - The name of the group to invalidate