[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-28 UTC."],[],[],null,["# Package com.google.api.client.extensions.appengine.datastore (2.0.0)\n\nVersion latestkeyboard_arrow_down\n\n- [2.0.0 (latest)](/java/docs/reference/google-http-client/latest/com.google.api.client.extensions.appengine.datastore)\n- [1.47.1](/java/docs/reference/google-http-client/1.47.1/com.google.api.client.extensions.appengine.datastore)\n- [1.46.3](/java/docs/reference/google-http-client/1.46.3/com.google.api.client.extensions.appengine.datastore)\n- [1.45.3](/java/docs/reference/google-http-client/1.45.3/com.google.api.client.extensions.appengine.datastore)\n- [1.44.2](/java/docs/reference/google-http-client/1.44.2/com.google.api.client.extensions.appengine.datastore)\n- [1.43.2](/java/docs/reference/google-http-client/1.43.2/com.google.api.client.extensions.appengine.datastore)\n- [1.42.3](/java/docs/reference/google-http-client/1.42.3/com.google.api.client.extensions.appengine.datastore)\n- [1.41.8](/java/docs/reference/google-http-client/1.41.8/com.google.api.client.extensions.appengine.datastore) \nSupport for the App Engine data store.\n\nClasses\n-------\n\n### [AppEngineDataStoreFactory](/java/docs/reference/google-http-client/latest/com.google.api.client.extensions.appengine.datastore.AppEngineDataStoreFactory)\n\nThread-safe Google App Engine implementation of a data store factory that directly uses the App\nEngine Data Store API.\n\nFor convenience, a default global instance is provided in [#getDefaultInstance()](/java/docs/reference/google-http-client/latest/com.google.api.client.extensions.appengine.datastore.AppEngineDataStoreFactory#com_google_api_client_extensions_appengine_datastore_AppEngineDataStoreFactory_getDefaultInstance__).\n\nBy 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\nvalue inside [DataStore#get(String)](/java/docs/reference/google-http-client/latest/com.google.api.client.util.store.DataStore#com_google_api_client_util_store_DataStore_get_java_lang_String_). The values in the Memcache are updated in the [DataStore#get(String)](/java/docs/reference/google-http-client/latest/com.google.api.client.util.store.DataStore#com_google_api_client_util_store_DataStore_get_java_lang_String_), [DataStore#set(String, Serializable)](/java/docs/reference/google-http-client/latest/com.google.api.client.util.store.DataStore#com_google_api_client_util_store_DataStore_set_), [DataStore#delete(String)](/java/docs/reference/google-http-client/latest/com.google.api.client.util.store.DataStore#com_google_api_client_util_store_DataStore_delete_java_lang_String_), [DataStore#values()](/java/docs/reference/google-http-client/latest/com.google.api.client.util.store.DataStore#com_google_api_client_util_store_DataStore_values__), and [DataStore#clear()](/java/docs/reference/google-http-client/latest/com.google.api.client.util.store.DataStore#com_google_api_client_util_store_DataStore_clear__) methods.\n\n### [AppEngineDataStoreFactory.Builder](/java/docs/reference/google-http-client/latest/com.google.api.client.extensions.appengine.datastore.AppEngineDataStoreFactory.Builder)\n\nApp Engine data store factory builder.\n\nImplementation is not thread-safe."]]