Package org.ametys.core.util

Interface Cacheable

All Known Implementing Classes:

AADUserDirectory, AbstractCachingUserDirectory, AbstractContentBasedSearchable, ContentSearchable, CourseSearchable, JdbcGroupDirectory, JdbcUserDirectory, LdapGroupDirectory, LdapUserDirectory, PrivateContentSearchable, ProgramSearchable

public interface Cacheable

Trait for easily cache some elements, in multiple Caches if necessary.
This is the preferred way to manage the caching of elements (over CachingComponent), as it will use the CacheManager mechanism, and as it is an interface, it will not interfere in the class hierarchy of the implementing component.

The methods to implement are:

• getManagedCaches(): for describing the managed caches;
• getCacheManager(): for binding the reference of AbstractCacheManager;
• isCachingEnabled(): for implementing the potential business logic to determine if the caching is enabled.

The methods to call are:

• createCaches(): for creating the managed caches;
• removeCaches(): for removing the managed caches;
• getCache(java.lang.String): for getting a reference to a managed cache.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	Cacheable.SingleCacheConfiguration	A configuration for describing to Cacheable interface the managed caches to create.

Method Summary

Modifier and Type	Method	Description
default void	createCaches()	Creates the managed caches.
default <K,V> Cache<K,V>	getCache(String cacheId)	Gets the managed cache with the given id.
AbstractCacheManager	getCacheManager()	Returns the instance of the implementation of AbstractCacheManager to use.
Collection<Cacheable.SingleCacheConfiguration>	getManagedCaches()	Gets the managed caches.
default boolean	hasComputableSize()	Determines if the cache has a computable size.
default boolean	isCachingEnabled()	Returns true if the cache is enabled The default implementation returns true.
default void	removeCaches()	Removes the managed caches.

Method Detail

getManagedCaches

Collection<Cacheable.SingleCacheConfiguration> getManagedCaches()

Gets the managed caches.
This is meant to be implemented in order to describe the managed caches and automatically create and remove the corresponding caches in createCaches() and removeCaches() default methods.
This is not meant to be called manually.

Returns:

A collection of Cacheable.SingleCacheConfigurations to manage

isCachingEnabled

default boolean isCachingEnabled()

Returns true if the cache is enabled
The default implementation returns true.
You can override this method to modify the behavior.

Returns:

true if the cache is enabled

getCacheManager

AbstractCacheManager getCacheManager()

Returns the instance of the implementation of AbstractCacheManager to use.
This is not meant to be called manually.

Returns:

The AbstractCacheManager to bind

getCache

default <K,V> Cache<K,V> getCache(String cacheId)

Gets the managed cache with the given id.
It is advised to create its own business methods which call this method in order to retrieve the caches.
For instance, if the implementing class declares two caches, you can create the two methods:

• Cache<String, Double> getCachePriceByProductId()
• and Cache<Integer, Boolean> getCacheAvailabilityByProductIndex()

which simply call this method, so as to have methods to retrieve the caches with more semantic.

Type Parameters:

K - The type of the keys in the cache

V - The type of the values in the cache

Parameters:

cacheId - The cache id

Returns:

The managed Cache

createCaches

default void createCaches()

Creates the managed caches.
This is meant to be called manually, at the beginning of the lifecycle of the implementing class, in order to create and initialize the corresponding caches.
This is not meant to be overridden.

removeCaches

default void removeCaches()

Removes the managed caches.
This is meant to be called manually, at the end of the lifecycle of the implementing class, in order to remove the corresponding caches.
This is not meant to be overridden.

hasComputableSize

default boolean hasComputableSize()

Determines if the cache has a computable size. This operation can be very slow.

Returns:

true if we can compute the size on the cache.