Package org.elasticsearch.discovery.zen

Class ElectMasterService

java.lang.Object

org.elasticsearch.discovery.zen.ElectMasterService

public class ElectMasterService
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	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	Description
static final Setting<Integer>	DISCOVERY_ZEN_MINIMUM_MASTER_NODES_SETTING

Constructor Summary

Constructors

Constructor	Description
ElectMasterService(Settings settings)

Method Summary

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

Methods inherited from class java.lang.Object

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

Field Details

DISCOVERY_ZEN_MINIMUM_MASTER_NODES_SETTING

public static final Setting<Integer> DISCOVERY_ZEN_MINIMUM_MASTER_NODES_SETTING

Constructor Details

ElectMasterService

public ElectMasterService(Settings settings)

Method Details

minimumMasterNodes

public void minimumMasterNodes(int minimumMasterNodes)

minimumMasterNodes

public int minimumMasterNodes()

countMasterNodes

public int countMasterNodes(Iterable<DiscoveryNode> nodes)

hasEnoughCandidates

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

electMaster

public ElectMasterService.MasterCandidate electMaster(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(Collection<DiscoveryNode> activeMasters)

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

hasEnoughMasterNodes

public boolean hasEnoughMasterNodes(Iterable<DiscoveryNode> nodes)

hasTooManyMasterNodes

public boolean hasTooManyMasterNodes(Iterable<DiscoveryNode> nodes)

logMinimumMasterNodesWarningIfNecessary

public void logMinimumMasterNodesWarningIfNecessary(ClusterState oldState,
 ClusterState newState)

nextPossibleMasters

public DiscoveryNode[] nextPossibleMasters(Collection<DiscoveryNode> nodes,
 int numberOfPossibleMasters)

Returns a list of the next possible masters.