Source

public final enum Source extends Enum<Source>

Configures the behavior of get() calls on DocumentReference and Query. By providing a Source value, these methods can be configured to fetch results only from the server, only from the local cache, or attempt to fetch results from the server and fall back to the cache (which is the default).

Inherited Method Summary

From class java.lang.Enum

final Object	clone()
final int	compareTo(Source arg0)
int	compareTo(Object arg0)
final boolean	equals(Object arg0)
final void	finalize()
final Class<Source>	getDeclaringClass()
final int	hashCode()
final String	name()
final int	ordinal()
String	toString()
static <T extends Enum<T>> T	valueOf(Class<T> arg0, String arg1)

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()

From interface java.lang.Comparable

abstract int

compareTo(Source arg0)

Enum Values

public static final Source CACHE

Causes Cloud Firestore to immediately return a value from the cache, ignoring the server completely (implying that the returned value may be stale with respect to the value on the server). If there is no data in the cache to satisfy the get() call, get() will return an error and get() will return an empty QuerySnapshot with no documents.

public static final Source DEFAULT

Causes Cloud Firestore to try to retrieve an up-to-date (server-retrieved) snapshot, but fall back to returning cached data if the server can't be reached.

public static final Source SERVER

Causes Cloud Firestore to avoid the cache, generating an error if the server cannot be reached. Note that the cache will still be updated if the server request succeeds. Also note that latency-compensation still takes effect, so any pending write operations will be visible in the returned data (merged into the server-provided data).