Get an instance ofDatabase corresponding to the givenApp.

Firebase RealtimeDatabase usesfirebase::App to communicate with Firebase Authentication to authenticate users to theDatabase server backend.

If you callGetInstance() multiple times with the sameApp, you will get the same instance ofDatabase.

Gets an instance of FirebaseDatabase for the specified URL.

If you callGetInstance() multiple times with the sameApp and URL, you will get the same instance ofDatabase.

Get aDatabaseReference to the root of the database.

Get aDatabaseReference for the specified path.

Get aDatabaseReference for the provided URL, which must belong to the database URL this instance is already connected to.

Shuts down the connection to the Firebase RealtimeDatabase backend untilGoOnline() is called.

Resumes the connection to the Firebase RealtimeDatabase backend after a previousGoOffline() call.

Purge all pending writes to the Firebase RealtimeDatabase server.

The Firebase RealtimeDatabase client automatically queues writes and sends them to the server at the earliest opportunity, depending on network connectivity. In some cases (e.g. offline usage) there may be a large number of writes waiting to be sent. Calling this method will purge all outstanding writes so they are abandoned. All writes will be purged, including transactions and onDisconnect() writes. The writes will be rolled back locally, perhaps triggering events for affected event listeners, and the client will not (re-)send them to the Firebase backend.

Get thefirebase::App that thisDatabase was created with.

Get the log verbosity of thisDatabase instance.

Set the log verbosity of thisDatabase instance.

The log filtering is cumulative with FirebaseApp. That is, this library's log messages will only be displayed if they are not filtered out by this library's log level setting and by FirebaseApp's log level setting.

Note: On Android this can only be set before any operations have been performed with the object.

The FirebaseDatabase client will cache synchronized data and keep track of all writes you've initiated while your application is running. It seamlessly handles intermittent network connections and re-sends write operations when the network connection is restored. However by default your write operations and cached data are only stored in-memory and will be lost when your app restarts. By setting this value totrue, the data will be persisted to on-device (disk) storage and will thus be available again when the app is restarted (even when there is no network connectivity at that time).

Note: SetPersistenceEnabled should be called before creating any instances ofDatabaseReference, and only needs to be called once per application.

Get the URL that thisDatabase was created with.

Destructor for theDatabase object.

When deleted, this instance will be removed from the cache ofDatabase objects. If you callGetInstance() in the future with the sameApp, a newDatabase instance will be created.