org.neo4j.causalclustering.core.consensus.membership

Class MembershipWaiter

java.lang.Object

org.neo4j.causalclustering.core.consensus.membership.MembershipWaiter

public class MembershipWaiter
extends Object

Waits until member has "fully joined" the raft membership. We consider a member fully joined where:

• It is a member of the voting group (its opinion will count towards leader elections and committing entries), and
• It is sufficiently caught up with the leader, so that long periods of unavailability are unlikely, should the leader fail.

To determine whether the member is sufficiently caught up, we check periodically how far behind we are, once every maxCatchupLag. If the leader is always moving forwards we will never fully catch up, so all we look for is that we have caught up with where the leader was the previous time that we checked.

Constructor Summary

Constructors

Constructor and Description
MembershipWaiter(MemberId myself, org.neo4j.kernel.impl.util.JobScheduler jobScheduler, Supplier<org.neo4j.kernel.internal.DatabaseHealth> dbHealthSupplier, long maxCatchupLag, org.neo4j.logging.LogProvider logProvider)

Method Summary

Methods inherited from class java.lang.Object

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

Constructor Detail

MembershipWaiter

public MembershipWaiter(MemberId myself,
                        org.neo4j.kernel.impl.util.JobScheduler jobScheduler,
                        Supplier<org.neo4j.kernel.internal.DatabaseHealth> dbHealthSupplier,
                        long maxCatchupLag,
                        org.neo4j.logging.LogProvider logProvider)