com.transcordia.platform.hazelcast.persistence

Class NullMapPersistence

java.lang.Object

com.transcordia.platform.hazelcast.persistence.NullMapPersistence

All Implemented Interfaces:

com.hazelcast.core.MapLoader, com.hazelcast.core.MapLoaderLifecycleSupport, com.hazelcast.core.MapStore, MapPersistence

public class NullMapPersistence
extends Object
implements MapPersistence

Constructor Summary

Constructors

Constructor and Description
NullMapPersistence()

Method Summary

Methods

Modifier and Type	Method and Description
void	delete(Object key) Deletes the entry with a given key from the store.
void	deleteAll(Collection keys) Deletes multiple entries from the store.
void	destroy() Hazelcast will call this method before shutting down.
void	init(com.hazelcast.core.HazelcastInstance hazelcastInstance, Properties properties, String mapName) Initializes this MapLoader implementation.
Object	load(Object key) Loads the value of a given key.
Map	loadAll(Collection keys) Loads given keys.
Set	loadAllKeys() Loads all of the keys from the store.
void	store(Object key, Object value) Stores the key-value pair.
void	storeAll(Map map) Stores multiple entries.

Methods inherited from class java.lang.Object

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

Constructor Detail

NullMapPersistence

public NullMapPersistence()

Method Detail

init

public void init(com.hazelcast.core.HazelcastInstance hazelcastInstance,
        Properties properties,
        String mapName)

Initializes this MapLoader implementation. Hazelcast will call this method when the map is first used on the HazelcastInstance. Implementation can initialize required resources for the implementing mapLoader such as reading a config file and/or creating database connection.

Specified by:

init in interface com.hazelcast.core.MapLoaderLifecycleSupport

Parameters:

hazelcastInstance - HazelcastInstance of this mapLoader.

properties - Properties set for this mapStore. see MapStoreConfig

mapName - name of the map.

destroy

public void destroy()

Hazelcast will call this method before shutting down. This method can be overridden to cleanup the resources held by this map loader implementation, such as closing the database connections etc.

Specified by:

destroy in interface com.hazelcast.core.MapLoaderLifecycleSupport

store

public void store(Object key,
         Object value)

Stores the key-value pair.

Specified by:

store in interface com.hazelcast.core.MapStore

Parameters:

key - key of the entry to store

value - value of the entry to store

storeAll

public void storeAll(Map map)

Stores multiple entries. Implementation of this method can optimize the store operation by storing all entries in one database connection for instance.

Specified by:

storeAll in interface com.hazelcast.core.MapStore

Parameters:

map - map of entries to store

delete

public void delete(Object key)

Deletes the entry with a given key from the store.

Specified by:

delete in interface com.hazelcast.core.MapStore

Parameters:

key - key to delete from the store.

deleteAll

public void deleteAll(Collection keys)

Deletes multiple entries from the store.

Specified by:

deleteAll in interface com.hazelcast.core.MapStore

Parameters:

keys - keys of the entries to delete.

load

public Object load(Object key)

Loads the value of a given key. If distributed map doesn't contain the value for the given key then Hazelcast will call implementation's load (key) method to obtain the value. Implementation can use any means of loading the given key; such as an O/R mapping tool, simple SQL or reading a file etc.

Specified by:

load in interface com.hazelcast.core.MapLoader

Parameters:

key -

Returns:

value of the key

loadAll

public Map loadAll(Collection keys)

Loads given keys. This is batch load operation so that implementation can optimize the multiple loads.

Specified by:

loadAll in interface com.hazelcast.core.MapLoader

Parameters:

keys - keys of the values entries to load

Returns:

map of loaded key-value pairs.

loadAllKeys

public Set loadAllKeys()

Loads all of the keys from the store.

Specified by:

loadAllKeys in interface com.hazelcast.core.MapLoader

Returns:

all the keys