FirebaseFirestore

public class FirebaseFirestore extends Object

Represents a Firestore Database and is the entry point for all Firestore operations

Subclassing Note: Firestore classes are not meant to be subclassed except for use in test mocks. Subclassing is not supported in production code and new SDK releases may break code that does so.

Public Method Summary

WriteBatch	batch() Creates a write batch, used for performing multiple writes as a single atomic operation.
Task<Void>	clearPersistence() Clears the persistent storage, including pending writes and cached documents.
CollectionReference	collection(String collectionPath) Gets a CollectionReference instance that refers to the collection at the specified path within the database.
Query	collectionGroup(String collectionId) Creates and returns a new @link{Query} that includes all documents in the database that are contained in a collection or subcollection with the given @code{collectionId}.
Task<Void>	disableNetwork() Disables network access for this instance.
DocumentReference	document(String documentPath) Gets a `DocumentReference` instance that refers to the document at the specified path within the database.
Task<Void>	enableNetwork() Re-enables network usage for this instance after a prior call to disableNetwork().
FirebaseApp	getApp() Returns the FirebaseApp instance to which this FirebaseFirestore belongs.
FirebaseFirestoreSettings	getFirestoreSettings() Returns the settings used by this FirebaseFirestore object.
static FirebaseFirestore	getInstance()
static FirebaseFirestore	getInstance(FirebaseApp app)
Task<Void>	runBatch(WriteBatch.Function batchFunction) Executes a batchFunction on a newly created WriteBatch and then commits all of the writes made by the batchFunction as a single atomic unit.
<TResult> Task<TResult>	runTransaction(Function<TResult> updateFunction) Executes the given updateFunction and then attempts to commit the changes applied within the transaction.
void	setFirestoreSettings(FirebaseFirestoreSettings settings) Sets any custom settings used to configure this FirebaseFirestore object.
static void	setLoggingEnabled(boolean loggingEnabled) Globally enables / disables Firestore logging for the SDK.

Inherited Method Summary

From class java.lang.Object

Object	clone()
boolean	equals(Object arg0)
void	finalize()
final Class<?>	getClass()
int	hashCode()
final void	notify()
final void	notifyAll()
String	toString()
final void	wait(long arg0, int arg1)
final void	wait(long arg0)
final void	wait()

Public Methods

public WriteBatch batch ()

Creates a write batch, used for performing multiple writes as a single atomic operation.

The maximum number of writes allowed in a single batch is 500, but note that each usage of FieldValue.serverTimestamp(), FieldValue.arrayUnion(), FieldValue.arrayRemove(), or FieldValue.increment() inside a transaction counts as an additional write.

Returns

• The created WriteBatch object.

public Task<Void> clearPersistence ()

Clears the persistent storage, including pending writes and cached documents.

Must be called while the FirebaseFirestore instance is not started (after the app is shutdown or when the app is first initialized). On startup, this method must be called before other methods (other than setFirestoreSettings()). If the FirebaseFirestore instance is still running, the Task will fail with an error code of FAILED_PRECONDITION.

Note that clearPersistence() is primarily intended to help write reliable tests that use Cloud Firestore. It uses an efficient mechanism for dropping existing data but does not attempt to securely overwrite or otherwise make cached data unrecoverable. For applications that are sensitive to the disclosure of cached data in between user sessions, we strongly recommend not enabling persistence at all.

Returns

• A Task that is resolved when the persistent storage is cleared. Otherwise, the Task is rejected with an error.

public CollectionReference collection (String collectionPath)

Gets a CollectionReference instance that refers to the collection at the specified path within the database.

Parameters

collectionPath	A slash-separated path to a collection.

Returns

• The CollectionReference instance.

public Query collectionGroup (String collectionId)

Creates and returns a new @link{Query} that includes all documents in the database that are contained in a collection or subcollection with the given @code{collectionId}.

Parameters

collectionId	Identifies the collections to query over. Every collection or subcollection with this ID as the last segment of its path will be included. Cannot contain a slash.

Returns

• The created Query.

public Task<Void> disableNetwork ()

Disables network access for this instance. While the network is disabled, any snapshot listeners or get() calls will return results from cache, and any write operations will be queued until network usage is re-enabled via a call to enableNetwork().

Returns

• A Task that will be completed once networking is disabled.

public DocumentReference document (String documentPath)

Gets a `DocumentReference` instance that refers to the document at the specified path within the database.

Parameters

documentPath	A slash-separated path to a document.

Returns

• The DocumentReference instance.

public Task<Void> enableNetwork ()

Re-enables network usage for this instance after a prior call to disableNetwork().

Returns

• A Task that will be completed once networking is enabled.

public FirebaseApp getApp ()

Returns the FirebaseApp instance to which this FirebaseFirestore belongs.

Returns

• The FirebaseApp instance to which this FirebaseFirestore belongs.

public FirebaseFirestoreSettings getFirestoreSettings ()

Returns the settings used by this FirebaseFirestore object.

public static FirebaseFirestore getInstance ()

public static FirebaseFirestore getInstance (FirebaseApp app)

public Task<Void> runBatch (WriteBatch.Function batchFunction)

Executes a batchFunction on a newly created WriteBatch and then commits all of the writes made by the batchFunction as a single atomic unit.

Parameters

batchFunction	The function to execute within the batch context.

Returns

• A Task that will be resolved when the batch has been committed.

public Task<TResult> runTransaction (Function<TResult> updateFunction)

Executes the given updateFunction and then attempts to commit the changes applied within the transaction. If any document read within the transaction has changed, the updateFunction will be retried. If it fails to commit after 5 attempts, the transaction will fail.

Parameters

updateFunction	The function to execute within the transaction context.

Returns

• The task returned from the updateFunction.

public void setFirestoreSettings (FirebaseFirestoreSettings settings)

Sets any custom settings used to configure this FirebaseFirestore object. This method can only be called before calling any other methods on this object.

public static void setLoggingEnabled (boolean loggingEnabled)

Globally enables / disables Firestore logging for the SDK.