com.spotify.helios.servicescommon.coordination

Class PersistentPathChildrenCache<T>

java.lang.Object

com.google.common.util.concurrent.AbstractIdleService

com.spotify.helios.servicescommon.coordination.PersistentPathChildrenCache<T>

Type Parameters:

T - The deserialized node value type.

All Implemented Interfaces:

com.google.common.util.concurrent.Service

public class PersistentPathChildrenCache<T>
extends com.google.common.util.concurrent.AbstractIdleService

A view of the children of a zookeeper node, kept up to date with zookeeper using watches and persisted to disk in order to guarantee availability when zookeeper is unavailable.

The view is persisted to disk as json and the node values must be valid json.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	PersistentPathChildrenCache.Listener

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

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

Constructor Summary

Constructors

Constructor and Description
PersistentPathChildrenCache(org.apache.curator.framework.CuratorFramework curator, String path, String clusterId, Path snapshotFile, com.fasterxml.jackson.databind.JavaType valueType)

Method Summary

Modifier and Type	Method and Description
void	addListener(PersistentPathChildrenCache.Listener listener)
Map<String,T>	getNodes()
void	removeListener(PersistentPathChildrenCache.Listener listener)
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

Constructor Detail

PersistentPathChildrenCache

public PersistentPathChildrenCache(org.apache.curator.framework.CuratorFramework curator,
                                   String path,
                                   String clusterId,
                                   Path snapshotFile,
                                   com.fasterxml.jackson.databind.JavaType valueType)
                            throws IOException,
                                   InterruptedException

Throws:

IOException

InterruptedException

Method Detail

addListener

public void addListener(PersistentPathChildrenCache.Listener listener)

removeListener

public void removeListener(PersistentPathChildrenCache.Listener listener)

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

getNodes

public Map<String,T> getNodes()