com.sonian.elasticsearch.zookeeper.discovery

Class ZooKeeperClusterState

java.lang.Object

org.elasticsearch.common.component.AbstractComponent

org.elasticsearch.common.component.AbstractLifecycleComponent<ZooKeeperClusterState>

com.sonian.elasticsearch.zookeeper.discovery.ZooKeeperClusterState

All Implemented Interfaces:

org.elasticsearch.common.component.CloseableComponent, org.elasticsearch.common.component.LifecycleComponent<ZooKeeperClusterState>

public class ZooKeeperClusterState
extends org.elasticsearch.common.component.AbstractLifecycleComponent<ZooKeeperClusterState>

Publishes and retrieves cluster state using zookeeper.

By default cluster state is stored in /es/elasticsearch/state node. State is published in several parts. Each part is updated only if it got changed and then /es/elasticsearch/state/state node is updated to reflect the latest versions of the parts.

Author:

imotov

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ZooKeeperClusterState.NewClusterStateListener

Field Summary

Fields inherited from class org.elasticsearch.common.component.AbstractLifecycleComponent

lifecycle

Fields inherited from class org.elasticsearch.common.component.AbstractComponent

componentSettings, logger, settings

Constructor Summary

Constructors

Constructor and Description
ZooKeeperClusterState(org.elasticsearch.common.settings.Settings settings, ZooKeeperEnvironment environment, ZooKeeperClient zooKeeperClient, org.elasticsearch.discovery.zen.DiscoveryNodesProvider nodesProvider, org.elasticsearch.cluster.ClusterName clusterName)

Method Summary

Methods

Modifier and Type	Method and Description
protected String	clusterStateVersion()
protected void	doClose()
protected void	doStart()
protected void	doStop()
void	publish(org.elasticsearch.cluster.ClusterState state, org.elasticsearch.discovery.Discovery.AckListener ackListener) Publishes new cluster state
org.elasticsearch.cluster.ClusterState	retrieve(ZooKeeperClusterState.NewClusterStateListener newClusterStateListener) Retrieves cluster state
void	syncClusterState() Makes sure that internal cache structures are in sync with zookeeper This method should be called when node becomes master and switches from retrieving cluster state to publishing cluster state.

Methods inherited from class org.elasticsearch.common.component.AbstractLifecycleComponent

addLifecycleListener, close, lifecycleState, removeLifecycleListener, start, stop

Methods inherited from class org.elasticsearch.common.component.AbstractComponent

nodeName

Methods inherited from class java.lang.Object

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

Constructor Detail

ZooKeeperClusterState

public ZooKeeperClusterState(org.elasticsearch.common.settings.Settings settings,
                     ZooKeeperEnvironment environment,
                     ZooKeeperClient zooKeeperClient,
                     org.elasticsearch.discovery.zen.DiscoveryNodesProvider nodesProvider,
                     org.elasticsearch.cluster.ClusterName clusterName)

Method Detail

publish

public void publish(org.elasticsearch.cluster.ClusterState state,
           org.elasticsearch.discovery.Discovery.AckListener ackListener)
             throws org.elasticsearch.ElasticsearchException,
                    InterruptedException

Publishes new cluster state

Parameters:

state -

Throws:

org.elasticsearch.ElasticsearchException

InterruptedException

retrieve

public org.elasticsearch.cluster.ClusterState retrieve(ZooKeeperClusterState.NewClusterStateListener newClusterStateListener)
                                                throws org.elasticsearch.ElasticsearchException,
                                                       InterruptedException

Retrieves cluster state

Parameters:

newClusterStateListener - triggered when cluster state changes

Returns:

Throws:

org.elasticsearch.ElasticsearchException

InterruptedException

syncClusterState

public void syncClusterState()
                      throws org.elasticsearch.ElasticsearchException,
                             InterruptedException

Makes sure that internal cache structures are in sync with zookeeper

This method should be called when node becomes master and switches from retrieving cluster state to publishing cluster state.

Throws:

org.elasticsearch.ElasticsearchException

InterruptedException

doStart

protected void doStart()
                throws org.elasticsearch.ElasticsearchException

Specified by:

doStart in class org.elasticsearch.common.component.AbstractLifecycleComponent<ZooKeeperClusterState>

Throws:

org.elasticsearch.ElasticsearchException

doStop

protected void doStop()
               throws org.elasticsearch.ElasticsearchException

Specified by:

doStop in class org.elasticsearch.common.component.AbstractLifecycleComponent<ZooKeeperClusterState>

Throws:

org.elasticsearch.ElasticsearchException

doClose

protected void doClose()
                throws org.elasticsearch.ElasticsearchException

Specified by:

doClose in class org.elasticsearch.common.component.AbstractLifecycleComponent<ZooKeeperClusterState>

Throws:

org.elasticsearch.ElasticsearchException

clusterStateVersion

protected String clusterStateVersion()