io.nats.client.api

Interface Watcher<T>

Type Parameters:

T - the type being watched

All Known Subinterfaces:

KeyValueWatcher, ObjectStoreWatcher

public interface Watcher<T>

Use the Watcher interface to watch for updates

Method Summary

Modifier and Type	Method and Description
void	endOfData() Called once if there is no data when the watch is created or if there is data, the first time the watch exhausts all existing data.
default @Nullable java.lang.String	getConsumerNamePrefix() The watcher can supply a prefix to use on the consumer name that is generated when creating the internal watch consumer.
void	watch(T t) Called when an object has been updated.

Method Detail

watch

void watch(T t)

Called when an object has been updated.

Parameters:

t - The watched object

endOfData

void endOfData()

Called once if there is no data when the watch is created or if there is data, the first time the watch exhausts all existing data.

getConsumerNamePrefix

default @Nullable java.lang.String getConsumerNamePrefix()

The watcher can supply a prefix to use on the consumer name that is generated when creating the internal watch consumer. This can be useful for monitoring the consumer.

Returns:

the name, or null if not needed, which is the default interface implementation.