com.spotify.helios.servicescommon.coordination

Class ZooKeeperUpdatingPersistentDirectory

java.lang.Object

com.google.common.util.concurrent.AbstractIdleService

com.spotify.helios.servicescommon.coordination.ZooKeeperUpdatingPersistentDirectory

All Implemented Interfaces:

com.google.common.util.concurrent.Service

public class ZooKeeperUpdatingPersistentDirectory
extends com.google.common.util.concurrent.AbstractIdleService

A map that persists modification locally on disk and attempt to replicate modifications to ZooKeeper, retrying forever until successful. Note that ZooKeeper is only written to and never read from, so this is not a distributed map. Multiple changes to the same key are folded and only the last value is written to ZooKeeper.

Nested Class Summary

Nested classes/interfaces inherited from interface com.google.common.util.concurrent.Service

com.google.common.util.concurrent.Service.Listener, com.google.common.util.concurrent.Service.State

Method Summary

Modifier and Type	Method and Description
static ZooKeeperUpdatingPersistentDirectory	create(String name, ZooKeeperClientProvider client, Path stateFile, String path)
Set<Map.Entry<String,byte[]>>	entrySet()
byte[]	get(Object key)
byte[]	put(String key, byte[] value)
byte[]	remove(Object key)
protected void	shutDown()
protected void	startUp()

Methods inherited from class com.google.common.util.concurrent.AbstractIdleService

addListener, awaitRunning, awaitRunning, awaitTerminated, awaitTerminated, executor, failureCause, isRunning, serviceName, startAsync, state, stopAsync, toString

Methods inherited from class java.lang.Object

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

Method Detail

put

public byte[] put(String key,
                  byte[] value)
           throws InterruptedException

Throws:

InterruptedException

remove

public byte[] remove(Object key)
              throws InterruptedException

Throws:

InterruptedException

get

public byte[] get(Object key)

entrySet

public Set<Map.Entry<String,byte[]>> entrySet()

startUp

protected void startUp()
                throws Exception

Specified by:

startUp in class com.google.common.util.concurrent.AbstractIdleService

Throws:

Exception

shutDown

protected void shutDown()
                 throws Exception

Specified by:

shutDown in class com.google.common.util.concurrent.AbstractIdleService

Throws:

Exception

create

public static ZooKeeperUpdatingPersistentDirectory create(String name,
                                                          ZooKeeperClientProvider client,
                                                          Path stateFile,
                                                          String path)
                                                   throws IOException,
                                                          InterruptedException

Throws:

IOException

InterruptedException