Package io.fabric8.kubernetes.client.extended.leaderelection

Class LeaderElector<C extends Namespaceable<C> & KubernetesClient>

java.lang.Object

io.fabric8.kubernetes.client.extended.leaderelection.LeaderElector<C>

public class LeaderElector<C extends Namespaceable<C> & KubernetesClient>
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
protected static Double	JITTER_FACTOR

Constructor Summary

Constructors

Constructor	Description
LeaderElector(C kubernetesClient, LeaderElectionConfig leaderElectionConfig)

Method Summary

Modifier and Type	Method	Description
protected boolean	canBecomeLeader(LeaderElectionRecord leaderElectionRecord)
protected boolean	isLeader(LeaderElectionRecord leaderElectionRecord)
protected static Duration	jitter(Duration duration, double maxFactor)	Returns a Duration between the provided duration and (duration + maxFactor*duration)
protected static boolean	loop(Consumer<CountDownLatch> consumer, long periodInMillis)	Periodically (every provided period) runs the provided Consumer in a separate thread causing the current thread to wait until the supplied CountDownLatch is decremented by 1 unit.
protected static ZonedDateTime	now()
void	run()	Starts the leader election loop

Methods inherited from class java.lang.Object

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

Field Detail

JITTER_FACTOR

protected static final Double JITTER_FACTOR

Constructor Detail

LeaderElector

public LeaderElector(C kubernetesClient,
                     LeaderElectionConfig leaderElectionConfig)

Method Detail

run

public void run()

Starts the leader election loop

isLeader

protected final boolean isLeader(LeaderElectionRecord leaderElectionRecord)

canBecomeLeader

protected final boolean canBecomeLeader(LeaderElectionRecord leaderElectionRecord)

loop

protected static boolean loop(Consumer<CountDownLatch> consumer,
                              long periodInMillis)

Periodically (every provided period) runs the provided Consumer in a separate thread causing the current thread to wait until the supplied CountDownLatch is decremented by 1 unit.

Parameters:

consumer - function to run in a separate thread

periodInMillis - to schedule the run of the provided consumer

Returns:

true if the current thread was not interrupted, false otherwise

now

protected static ZonedDateTime now()

jitter

protected static Duration jitter(Duration duration,
                                 double maxFactor)

Returns a Duration between the provided duration and (duration + maxFactor*duration)

Parameters:

duration - to apply jitter to

maxFactor - for jitter

Returns:

the jittered duration