org.neo4j.kernel.ha
Class InstanceAccessGuard

java.lang.Object
  org.neo4j.kernel.ha.InstanceAccessGuard

public class InstanceAccessGuard
extends Object

The instance guard is what ensures that the database will only take calls when it is in an ok state. It changes whenever the ClusterMemberState changes, and then allows query handling to easily determine if it is ok to call the database by calling await(long).

Nested Class Summary

static interface

InstanceAccessGuard.AccessListener

Constructor Summary

InstanceAccessGuard()

Method Summary

void	addListener(InstanceAccessGuard.AccessListener listener)
boolean	await(long millis)
void	removeListener(InstanceAccessGuard.AccessListener listener)
void	setState(HighAvailabilityMemberState state)

Methods inherited from class java.lang.Object

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

Constructor Detail

InstanceAccessGuard

public InstanceAccessGuard()

Method Detail

await

public boolean await(long millis)

setState

public void setState(HighAvailabilityMemberState state)

addListener

public void addListener(InstanceAccessGuard.AccessListener listener)

removeListener

public void removeListener(InstanceAccessGuard.AccessListener listener)