org.apache.curator.framework.recipes.cache

Interface CuratorCacheListener

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface CuratorCacheListener

Listener for CuratorCache events. The main functional interface is general purpose but you can build event specific listeners, etc. using the builder. Note: all listeners are wrapped in CuratorFramework.runSafe(Runnable) when called.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	CuratorCacheListener.Type An enumerated type that describes a change

Method Summary

Modifier and Type	Method and Description
static CuratorCacheListenerBuilder	builder() Returns a builder allowing type specific, and special purpose listeners.
void	event(CuratorCacheListener.Type type, ChildData oldData, ChildData data) Called when a data is created, changed or deleted.
default void	initialized() When the cache is started, the initial nodes are tracked and when they are finished loading into the cache this method is called.

Method Detail

event

void event(CuratorCacheListener.Type type,
           ChildData oldData,
           ChildData data)

Called when a data is created, changed or deleted.

Parameters:

type - the type of event

oldData - the old data or null

data - the new data or null

initialized

default void initialized()

When the cache is started, the initial nodes are tracked and when they are finished loading into the cache this method is called.

builder

static CuratorCacheListenerBuilder builder()

Returns a builder allowing type specific, and special purpose listeners.

Returns:

builder