Class AppEngineDataStoreFactory (1.42.2)

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

Static Methods

getDefaultInstance()

public static AppEngineDataStoreFactory getDefaultInstance()

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

Returns
TypeDescription
AppEngineDataStoreFactory

Constructors

AppEngineDataStoreFactory()

public AppEngineDataStoreFactory()

AppEngineDataStoreFactory(AppEngineDataStoreFactory.Builder builder)

public AppEngineDataStoreFactory(AppEngineDataStoreFactory.Builder builder)
Parameter
NameDescription
builderAppEngineDataStoreFactory.Builder

builder

Methods

<V>createDataStore(String id)

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
NameDescription
idString
Returns
TypeDescription
DataStore<V>
Overrides Exceptions
TypeDescription
IOException

getDisableMemcache()

public boolean getDisableMemcache()

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

Returns
TypeDescription
boolean