com.hazelcast.core

Interface QueueStore<T>

Type Parameters:

T - queue item type

All Known Implementing Classes:

QueueStoreWrapper

public interface QueueStore<T>

QueueStore makes a queue backed by a central data store; such as database, disk etc.

Method Summary

Methods

Modifier and Type	Method and Description
void	delete(Long key) Deletes the entry with a given key from the store.
void	deleteAll(Collection<Long> keys) Deletes multiple entries from the store.
T	load(Long key) Loads the value of a given key.
Map<Long,T>	loadAll(Collection<Long> keys) Loads given keys.
Set<Long>	loadAllKeys() Loads all of the keys from the store.
void	store(Long key, T value) Stores the key-value pair.
void	storeAll(Map<Long,T> map) Stores multiple entries.

Method Detail

store

void store(Long key,
         T value)

Stores the key-value pair.

Parameters:

key - key of the entry to store

value - value of the entry to store

storeAll

void storeAll(Map<Long,T> map)

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

Parameters:

map - map of entries to store

delete

void delete(Long key)

Deletes the entry with a given key from the store.

Parameters:

key - key to delete from the store.

deleteAll

void deleteAll(Collection<Long> keys)

Deletes multiple entries from the store.

Parameters:

keys - keys of the entries to delete.

load

T load(Long 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.

Parameters:

key -

Returns:

value of the key

loadAll

Map<Long,T> loadAll(Collection<Long> keys)

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

Parameters:

keys - keys of the values entries to load

Returns:

map of loaded key-value pairs.

loadAllKeys

Set<Long> loadAllKeys()

Loads all of the keys from the store.

Returns:

all the keys