com.hammurapi.store

Interface BackingStore<T,PK>

public interface BackingStore<T,PK>

Backing store can be used by object store to load and store objects. In this case the object store role is manipulation and backing store role is persistence.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(PK primaryKey, T obj) Adds object to the backing store.
Iterable<T>	load()
T	load(PK primaryKey) This method is invoked only if the object store getByPrimaryKey() is invoked and the primary key is not present in the object store.
void	remove(PK primaryKey, T obj) Removes object from the backing store.
void	update(PK primaryKey, T obj) Updates object in the backing store.

Method Detail

load

Iterable<T> load()

Returns:

Iterable to load objects to the object store.

load

T load(PK primaryKey)

This method is invoked only if the object store getByPrimaryKey() is invoked and the primary key is not present in the object store. This method can be used if the object store is used as a memory sensitive cache.

Parameters:

primaryKey -

Returns:

add

void add(PK primaryKey,
       T obj)

Adds object to the backing store.

Parameters:

primaryKey - Primary key value, if object store is configured with primary key extractor, null otherwise.

obj - Object to store.

remove

void remove(PK primaryKey,
          T obj)

Removes object from the backing store.

Parameters:

primaryKey - Primary key value, if object store is configured with primary key extractor, null otherwise.

obj - Object to remove.

update

void update(PK primaryKey,
          T obj)

Updates object in the backing store.

Parameters:

primaryKey - Primary key value, if object store is configured with primary key extractor, null otherwise.

obj - Object to update.