co.cask.cdap.security.zookeeper

Interface ResourceListener<T>

Type Parameters:

T - The resource type being managed by SharedResourceCache.

All Known Implementing Classes:

BaseResourceListener, DistributedKeyManager

public interface ResourceListener<T>

Allows a client to receive notifications when the resources managed by SharedResourceCache are updated.

Method Summary

Methods

Modifier and Type	Method and Description
void	onError(String name, Throwable throwable) Invoked when an error occurs in one of the resource operations.
void	onResourceDelete(String name) Invoked when a resource is removed from the shared cache.
void	onResourceUpdate(String name, T instance) Invoked on an update to an individual resource.
void	onUpdate() Invoked when the entire set of cached resources has changed.

Method Detail

onUpdate

void onUpdate()

Invoked when the entire set of cached resources has changed.

onResourceUpdate

void onResourceUpdate(String name,
                    T instance)

Invoked on an update to an individual resource.

Parameters:

name - the key for the resource being updated

instance - the resource instance which was updated

onResourceDelete

void onResourceDelete(String name)

Invoked when a resource is removed from the shared cache.

Parameters:

name - the key for the resource that has been removed

onError

void onError(String name,
           Throwable throwable)

Invoked when an error occurs in one of the resource operations.

Parameters:

name - the key for the resource on which the error occurred

throwable - the exception that was thrown