Package org.apache.shiro.cache

Class AbstractCacheManager

java.lang.Object

org.apache.shiro.cache.AbstractCacheManager

All Implemented Interfaces:

CacheManager, org.apache.shiro.lang.util.Destroyable

Direct Known Subclasses:

MemoryConstrainedCacheManager

public abstract class AbstractCacheManager
extends Object
implements CacheManager, org.apache.shiro.lang.util.Destroyable

Very simple abstract CacheManager implementation that retains all created Cache instances in an in-memory ConcurrentMap. Cache instance creation is left to subclasses via the createCache method implementation.

Since:

1.0

Constructor Summary

Constructors

Constructor	Description
AbstractCacheManager()	Default no-arg constructor that instantiates an internal name-to-cache ConcurrentMap.

Method Summary

Modifier and Type	Method	Description
protected abstract <K, V> Cache<K,V>	createCache(String name)	Creates a new Cache instance associated with the specified name.
void	destroy()	Cleanup method that first destroys all of it's managed caches and then clears out the internally referenced cache map.
<K, V> Cache<K,V>	getCache(String name)	Returns the cache with the specified name.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

AbstractCacheManager

public AbstractCacheManager()

Default no-arg constructor that instantiates an internal name-to-cache ConcurrentMap.

Method Details

getCache

public <K,
V> Cache<K,V> getCache(String name)
                           throws IllegalArgumentException,
CacheException

Returns the cache with the specified name. If the cache instance does not yet exist, it will be lazily created, retained for further access, and then returned.

Specified by:

getCache in interface CacheManager

Parameters:

name - the name of the cache to acquire.

Returns:

the cache with the specified name.

Throws:

IllegalArgumentException - if the name argument is null or does not contain text.

CacheException - if there is a problem lazily creating a Cache instance.

createCache

protected abstract <K,
V> Cache<K,V> createCache(String name)
                                          throws CacheException

Creates a new Cache instance associated with the specified name.

Parameters:

name - the name of the cache to create

Returns:

a new Cache instance associated with the specified name.

Throws:

CacheException - if the Cache instance cannot be created.

destroy

public void destroy()
             throws Exception

Cleanup method that first destroys all of it's managed caches and then clears out the internally referenced cache map.

Specified by:

destroy in interface org.apache.shiro.lang.util.Destroyable

Throws:

Exception - if any of the managed caches can't destroy properly.

toString

public String toString()

Overrides:

toString in class Object