com.google.cloud.firestore

Class RecursiveDelete

java.lang.Object

com.google.cloud.firestore.RecursiveDelete

@BetaApi
public final class RecursiveDelete
extends Object

Class used to store state required for running a recursive delete operation. Each recursive delete call should use a new instance of the class.

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_PENDING_OPS The query limit used for recursive deletes when fetching all descendants of the specified reference to delete.
static int	MIN_PENDING_OPS The number of pending BulkWriter operations at which RecursiveDelete starts the next limit query to fetch descendants.
static String	REFERENCE_NAME_MIN_ID Datastore allowed numeric IDs where Firestore only allows strings.

Method Summary

Modifier and Type	Method and Description
com.google.api.core.ApiFuture<Void>	run()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

REFERENCE_NAME_MIN_ID

public static final String REFERENCE_NAME_MIN_ID

Datastore allowed numeric IDs where Firestore only allows strings. Numeric IDs are exposed to Firestore as __idNUM__, so this is the lowest possible negative numeric value expressed in that format.

This constant is used to specify startAt/endAt values when querying for all descendants in a single collection.

See Also:

Constant Field Values

MAX_PENDING_OPS

public static final int MAX_PENDING_OPS

The query limit used for recursive deletes when fetching all descendants of the specified reference to delete. This is done to prevent the query stream from streaming documents faster than Firestore can delete.

See Also:

Constant Field Values

MIN_PENDING_OPS

public static final int MIN_PENDING_OPS

The number of pending BulkWriter operations at which RecursiveDelete starts the next limit query to fetch descendants. By starting the query while there are pending operations, Firestore can improve BulkWriter throughput. This helps prevent BulkWriter from idling while Firestore fetches the next query.

See Also:

Constant Field Values

Method Detail

run

public com.google.api.core.ApiFuture<Void> run()