Class AppEngineDataStoreFactory (1.43.0)

public class AppEngineDataStoreFactory extends AbstractDataStoreFactory

Thread-safe Google App Engine implementation of a data store factory that directly uses the App Engine Data Store API.

For convenience, a default global instance is provided in #getDefaultInstance().

By default, it uses the Memcache API as an in-memory data cache. To disable it, call Builder#setDisableMemcache(boolean). The Memcache is only read to check if a key already has a value inside DataStore#get(String). The values in the Memcache are updated in the DataStore#get(String), DataStore#set(String, Serializable), DataStore#delete(String), DataStore#values(), and DataStore#clear() methods.

Inheritance

java.lang.Object > AbstractDataStoreFactory > AppEngineDataStoreFactory

public static AppEngineDataStoreFactory getDefaultInstance()

Returns a global thread-safe instance based on the default constructor #AppEngineDataStoreFactory().

Returns

Type	Description
`AppEngineDataStoreFactory`

public AppEngineDataStoreFactory()

public AppEngineDataStoreFactory(AppEngineDataStoreFactory.Builder builder)

Parameter

Name	Description
`builder`	`AppEngineDataStoreFactory.Builder` builder

protected DataStore<V> <V>createDataStore(String id)

Returns a new instance of a type-specific data store based on the given unique ID.

The DataStore#getId() must match the id parameter from this method.

Parameter

Name	Description
`id`	`String`

Returns

Type	Description
`DataStore<V>`

Overrides

AbstractDataStoreFactory.<V>createDataStore(String id)

Exceptions

Type	Description
`IOException`

public boolean getDisableMemcache()

Returns whether to disable the memcache (which is enabled by default).

Returns

Type	Description
`boolean`