org.elasticsearch.discovery.zen

Class ElectMasterService

java.lang.Object

org.elasticsearch.common.component.AbstractComponent

org.elasticsearch.discovery.zen.ElectMasterService

public class ElectMasterService
extends AbstractComponent

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ElectMasterService.MasterCandidate a class to encapsulate all the information about a candidate in a master election that is needed to decided which of the candidates should win

Field Summary

Fields

Modifier and Type	Field and Description
static Setting<java.lang.Integer>	DISCOVERY_ZEN_MINIMUM_MASTER_NODES_SETTING

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

deprecationLogger, logger, settings

Constructor Summary

Constructors

Constructor and Description
ElectMasterService(Settings settings)

Method Summary

Modifier and Type	Method and Description
int	countMasterNodes(java.lang.Iterable<DiscoveryNode> nodes)
ElectMasterService.MasterCandidate	electMaster(java.util.Collection<ElectMasterService.MasterCandidate> candidates) Elects a new master out of the possible nodes, returning it.
boolean	hasEnoughCandidates(java.util.Collection<ElectMasterService.MasterCandidate> candidates)
boolean	hasEnoughMasterNodes(java.lang.Iterable<DiscoveryNode> nodes)
boolean	hasTooManyMasterNodes(java.lang.Iterable<DiscoveryNode> nodes)
void	logMinimumMasterNodesWarningIfNecessary(ClusterState oldState, ClusterState newState)
int	minimumMasterNodes()
void	minimumMasterNodes(int minimumMasterNodes)
DiscoveryNode[]	nextPossibleMasters(com.carrotsearch.hppc.ObjectContainer<DiscoveryNode> nodes, int numberOfPossibleMasters) Returns a list of the next possible masters.
DiscoveryNode	tieBreakActiveMasters(java.util.Collection<DiscoveryNode> activeMasters) selects the best active master to join, where multiple are discovered

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

logDeprecatedSetting, logRemovedSetting, nodeName

Methods inherited from class java.lang.Object

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

Field Detail

DISCOVERY_ZEN_MINIMUM_MASTER_NODES_SETTING

public static final Setting<java.lang.Integer> DISCOVERY_ZEN_MINIMUM_MASTER_NODES_SETTING

Constructor Detail

ElectMasterService

public ElectMasterService(Settings settings)

Method Detail

minimumMasterNodes

public void minimumMasterNodes(int minimumMasterNodes)

minimumMasterNodes

public int minimumMasterNodes()

countMasterNodes

public int countMasterNodes(java.lang.Iterable<DiscoveryNode> nodes)

hasEnoughCandidates

public boolean hasEnoughCandidates(java.util.Collection<ElectMasterService.MasterCandidate> candidates)

electMaster

public ElectMasterService.MasterCandidate electMaster(java.util.Collection<ElectMasterService.MasterCandidate> candidates)

Elects a new master out of the possible nodes, returning it. Returns null if no master has been elected.

tieBreakActiveMasters

public DiscoveryNode tieBreakActiveMasters(java.util.Collection<DiscoveryNode> activeMasters)

selects the best active master to join, where multiple are discovered

hasEnoughMasterNodes

public boolean hasEnoughMasterNodes(java.lang.Iterable<DiscoveryNode> nodes)

hasTooManyMasterNodes

public boolean hasTooManyMasterNodes(java.lang.Iterable<DiscoveryNode> nodes)

logMinimumMasterNodesWarningIfNecessary

public void logMinimumMasterNodesWarningIfNecessary(ClusterState oldState,
                                                    ClusterState newState)

nextPossibleMasters

public DiscoveryNode[] nextPossibleMasters(com.carrotsearch.hppc.ObjectContainer<DiscoveryNode> nodes,
                                           int numberOfPossibleMasters)

Returns a list of the next possible masters.