org.infinispan.loader
Interface CacheLoader

All Known Subinterfaces:

CacheStore

All Known Implementing Classes:

AbstractCacheLoader, AbstractCacheStore, AbstractDelegatingStore, AsyncStore, BucketBasedCacheStore, ChainingCacheStore, ClusterCacheLoader, FileCacheStore, LockSupportCacheStore, ReadOnlyStore, SingletonStore

public interface CacheLoader

Responsible for loading cache data from an external source

Since:

4.0

Author:

Manik Surtani

Method Summary

boolean	containsKey(Object key)
Class<? extends CacheLoaderConfig>	getConfigurationClass()
void	init(CacheLoaderConfig config, Cache cache, Marshaller m) Used to initialize a cache loader.
InternalCacheEntry	load(Object key) Loads an entry mapped to by a given key.
Set<InternalCacheEntry>	loadAll() Loads all entries in the loader.
void	start()
void	stop()

Method Detail

init

void init(CacheLoaderConfig config,
          Cache cache,
          Marshaller m)

Used to initialize a cache loader. Typically invoked by the CacheLoaderManager when setting up cache loaders.

Parameters:

config - the cache loader configuration bean

cache - cache associated with this cache loader. Implementations may use this to determine cache name when selecting where refer to state in storage, for example, a different database table name.

m - marshaller to use when loading state from a stream, if supported by the implementation.

load

InternalCacheEntry load(Object key)
                        throws CacheLoaderException

Loads an entry mapped to by a given key. Should return null if the entry does not exist. Expired entries are not returned.

Parameters:

key - key

Returns:

an entry

Throws:

CacheLoaderException - in the event of problems reading from source

loadAll

Set<InternalCacheEntry> loadAll()
                                throws CacheLoaderException

Loads all entries in the loader. Expired entries are not returned.

Returns:

a set of entries, or an empty set if the loader is emptied.

Throws:

CacheLoaderException - in the event of problems reading from source

containsKey

boolean containsKey(Object key)
                    throws CacheLoaderException

Parameters:

key - key to test

Returns:

true if the key exists, false otherwise

Throws:

CacheLoaderException - in the event of problems reading from source

start

void start()
           throws CacheLoaderException

Throws:

CacheLoaderException

stop

void stop()
          throws CacheLoaderException

Throws:

CacheLoaderException

getConfigurationClass

Class<? extends CacheLoaderConfig> getConfigurationClass()

Returns:

the type of the CacheLoaderConfig bean used to configure this implementation of CacheLoader