org.springframework.cache.guava

Class GuavaCacheManager

java.lang.Object

org.springframework.cache.guava.GuavaCacheManager

All Implemented Interfaces:

CacheManager

public class GuavaCacheManager
extends java.lang.Object
implements CacheManager

CacheManager implementation that lazily builds GuavaCache instances for each getCache(java.lang.String) request. Also supports a 'static' mode where the set of cache names is pre-defined through setCacheNames(java.util.Collection<java.lang.String>), with no dynamic creation of further cache regions at runtime.

The configuration of the underlying cache can be fine-tuned through a Guava CacheBuilder or CacheBuilderSpec, passed into this CacheManager through setCacheBuilder(<any>)/setCacheBuilderSpec(CacheBuilderSpec). A CacheBuilderSpec-compliant expression value can also be applied via the "cacheSpecification" bean property.

Requires Google Guava 12.0 or higher.

Since:

4.0

Author:

Juergen Hoeller, Stephane Nicoll

See Also:

GuavaCache

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	allowNullValues
private <any>	cacheBuilder
private <any>	cacheLoader
private java.util.concurrent.ConcurrentMap<java.lang.String,Cache>	cacheMap
private boolean	dynamic

Constructor Summary

Constructors

Constructor and Description
GuavaCacheManager() Construct a dynamic GuavaCacheManager, lazily creating cache instances as they are being requested.
GuavaCacheManager(java.lang.String... cacheNames) Construct a static GuavaCacheManager, managing caches for the specified cache names only.

Method Summary

Modifier and Type	Method and Description
protected Cache	createGuavaCache(java.lang.String name) Create a new GuavaCache instance for the specified cache name.
protected <any>	createNativeGuavaCache(java.lang.String name) Create a native Guava Cache instance for the specified cache name.
private void	doSetCacheBuilder(<any> cacheBuilder)
Cache	getCache(java.lang.String name) Return the cache associated with the given name.
java.util.Collection<java.lang.String>	getCacheNames() Return a collection of the cache names known by this manager.
boolean	isAllowNullValues() Return whether this cache manager accepts and converts null values for all of its caches.
private void	refreshKnownCaches() Create the known caches again with the current state of this manager.
void	setAllowNullValues(boolean allowNullValues) Specify whether to accept and convert null values for all caches in this cache manager.
void	setCacheBuilder(<any> cacheBuilder) Set the Guava CacheBuilder to use for building each individual GuavaCache instance.
void	setCacheBuilderSpec(CacheBuilderSpec cacheBuilderSpec) Set the Guava CacheBuilderSpec to use for building each individual GuavaCache instance.
void	setCacheLoader(<any> cacheLoader) Set the Guava CacheLoader to use for building each individual GuavaCache instance, turning it into a LoadingCache.
void	setCacheNames(java.util.Collection<java.lang.String> cacheNames) Specify the set of cache names for this CacheManager's 'static' mode.
void	setCacheSpecification(java.lang.String cacheSpecification) Set the Guava cache specification String to use for building each individual GuavaCache instance.

Methods inherited from class java.lang.Object

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

Field Detail

cacheMap

private final java.util.concurrent.ConcurrentMap<java.lang.String,Cache> cacheMap

dynamic

private boolean dynamic

cacheBuilder

private <any> cacheBuilder

cacheLoader

private <any> cacheLoader

allowNullValues

private boolean allowNullValues

Constructor Detail

GuavaCacheManager

public GuavaCacheManager()

Construct a dynamic GuavaCacheManager, lazily creating cache instances as they are being requested.

GuavaCacheManager

public GuavaCacheManager(java.lang.String... cacheNames)

Construct a static GuavaCacheManager, managing caches for the specified cache names only.

Method Detail

setCacheNames

public void setCacheNames(java.util.Collection<java.lang.String> cacheNames)

Specify the set of cache names for this CacheManager's 'static' mode.

The number of caches and their names will be fixed after a call to this method, with no creation of further cache regions at runtime.

Calling this with a null collection argument resets the mode to 'dynamic', allowing for further creation of caches again.

setCacheBuilder

public void setCacheBuilder(<any> cacheBuilder)

Set the Guava CacheBuilder to use for building each individual GuavaCache instance.

See Also:

createNativeGuavaCache(java.lang.String), com.google.common.cache.CacheBuilder#build()

setCacheBuilderSpec

public void setCacheBuilderSpec(CacheBuilderSpec cacheBuilderSpec)

Set the Guava CacheBuilderSpec to use for building each individual GuavaCache instance.

See Also:

createNativeGuavaCache(java.lang.String), com.google.common.cache.CacheBuilder#from(CacheBuilderSpec)

setCacheSpecification

public void setCacheSpecification(java.lang.String cacheSpecification)

Set the Guava cache specification String to use for building each individual GuavaCache instance. The given value needs to comply with Guava's CacheBuilderSpec (see its javadoc).

See Also:

createNativeGuavaCache(java.lang.String), com.google.common.cache.CacheBuilder#from(String)

setCacheLoader

public void setCacheLoader(<any> cacheLoader)

Set the Guava CacheLoader to use for building each individual GuavaCache instance, turning it into a LoadingCache.

See Also:

createNativeGuavaCache(java.lang.String), com.google.common.cache.CacheBuilder#build(CacheLoader), com.google.common.cache.LoadingCache

setAllowNullValues

public void setAllowNullValues(boolean allowNullValues)

Specify whether to accept and convert null values for all caches in this cache manager.

Default is "true", despite Guava itself not supporting null values. An internal holder object will be used to store user-level nulls.

isAllowNullValues

public boolean isAllowNullValues()

Return whether this cache manager accepts and converts null values for all of its caches.

getCacheNames

public java.util.Collection<java.lang.String> getCacheNames()

Description copied from interface: CacheManager

Return a collection of the cache names known by this manager.

Specified by:

getCacheNames in interface CacheManager

Returns:

the names of all caches known by the cache manager

getCache

public Cache getCache(java.lang.String name)

Description copied from interface: CacheManager

Return the cache associated with the given name.

Specified by:

getCache in interface CacheManager

Parameters:

name - the cache identifier (must not be null)

Returns:

the associated cache, or null if none found

createGuavaCache

protected Cache createGuavaCache(java.lang.String name)

Create a new GuavaCache instance for the specified cache name.

Parameters:

name - the name of the cache

Returns:

the Spring GuavaCache adapter (or a decorator thereof)

createNativeGuavaCache

protected <any> createNativeGuavaCache(java.lang.String name)

Create a native Guava Cache instance for the specified cache name.

Parameters:

name - the name of the cache

Returns:

the native Guava Cache instance

doSetCacheBuilder

private void doSetCacheBuilder(<any> cacheBuilder)

refreshKnownCaches

private void refreshKnownCaches()

Create the known caches again with the current state of this manager.