org.apache.pulsar.zookeeper

Class ZooKeeperChildrenCache

java.lang.Object

org.apache.pulsar.zookeeper.ZooKeeperChildrenCache

All Implemented Interfaces:

ZooKeeperCache.CacheUpdater<Set<String>>, Watcher

public class ZooKeeperChildrenCache
extends Object
implements Watcher, ZooKeeperCache.CacheUpdater<Set<String>>

This class keeps a cache of the children for several z-nodes and updates it whenever it's changed on zookeeper.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.zookeeper.Watcher

Watcher.Event, Watcher.WatcherType

Constructor Summary

Constructors

Constructor and Description
ZooKeeperChildrenCache(ZooKeeperCache cache, String path)

Method Summary

Modifier and Type	Method and Description
void	clear()
void	close()
Set<String>	get()
Set<String>	get(String path)
CompletableFuture<Set<String>>	getAsync()
CompletableFuture<Set<String>>	getAsync(String path)
void	process(WatchedEvent event)
void	registerListener(ZooKeeperCacheListener<Set<String>> listener)
void	reloadCache(String path)
void	unregisterListener(ZooKeeperCacheListener<Set<String>> listener)

Methods inherited from class java.lang.Object

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

Constructor Detail

ZooKeeperChildrenCache

public ZooKeeperChildrenCache(ZooKeeperCache cache,
                              String path)

Method Detail

get

public Set<String> get()
                throws KeeperException,
                       InterruptedException

Throws:

KeeperException

InterruptedException

get

public Set<String> get(String path)
                throws KeeperException,
                       InterruptedException

Throws:

KeeperException

InterruptedException

getAsync

public CompletableFuture<Set<String>> getAsync()

getAsync

public CompletableFuture<Set<String>> getAsync(String path)

clear

public void clear()

reloadCache

public void reloadCache(String path)

Specified by:

reloadCache in interface ZooKeeperCache.CacheUpdater<Set<String>>

registerListener

public void registerListener(ZooKeeperCacheListener<Set<String>> listener)

Specified by:

registerListener in interface ZooKeeperCache.CacheUpdater<Set<String>>

unregisterListener

public void unregisterListener(ZooKeeperCacheListener<Set<String>> listener)

Specified by:

unregisterListener in interface ZooKeeperCache.CacheUpdater<Set<String>>

process

public void process(WatchedEvent event)

Specified by:

process in interface Watcher

close

public void close()