org.neo4j.kernel.ha

Class HighAvailabilityLogger

java.lang.Object

org.neo4j.kernel.ha.HighAvailabilityLogger

All Implemented Interfaces:

org.neo4j.cluster.member.ClusterMemberListener, org.neo4j.cluster.protocol.cluster.ClusterListener, org.neo4j.kernel.AvailabilityGuard.AvailabilityListener

public class HighAvailabilityLogger
extends Object
implements org.neo4j.cluster.member.ClusterMemberListener, org.neo4j.cluster.protocol.cluster.ClusterListener, org.neo4j.kernel.AvailabilityGuard.AvailabilityListener

This class logs whenever important cluster or high availability events are issued.

Nested Class Summary

Nested classes/interfaces inherited from interface org.neo4j.cluster.member.ClusterMemberListener

org.neo4j.cluster.member.ClusterMemberListener.Adapter

Nested classes/interfaces inherited from interface org.neo4j.cluster.protocol.cluster.ClusterListener

org.neo4j.cluster.protocol.cluster.ClusterListener.Adapter

Constructor Summary

Constructors

Constructor and Description
HighAvailabilityLogger(org.neo4j.logging.LogProvider logProvider, org.neo4j.cluster.InstanceId myId)

Method Summary

Methods

Modifier and Type	Method and Description
void	available() Logged when users are allowed to access the database for transactions.
void	coordinatorIsElected(org.neo4j.cluster.InstanceId coordinatorId)
void	elected(String role, org.neo4j.cluster.InstanceId instanceId, URI electedMember) Logged when an instance is elected for a role, such as coordinator of a cluster.
void	enteredCluster(org.neo4j.cluster.protocol.cluster.ClusterConfiguration clusterConfiguration) Logged when the instance itself joins or rejoins a cluster
void	joinedCluster(org.neo4j.cluster.InstanceId instanceId, URI member) Logged when another instance joins the cluster
void	leftCluster() Logged when the instance itself leaves the cluster
void	leftCluster(org.neo4j.cluster.InstanceId instanceId, URI member) Logged when another instance leaves the cluster
void	memberIsAlive(org.neo4j.cluster.InstanceId instanceId) Logged when another instance is detected as being alive again.
void	memberIsAvailable(String role, org.neo4j.cluster.InstanceId availableId, URI atUri, org.neo4j.kernel.impl.store.StoreId storeId) Logged when a member becomes available as a role, such as MASTER or SLAVE.
void	memberIsFailed(org.neo4j.cluster.InstanceId instanceId) Logged when another instance is detected as being failed.
void	memberIsUnavailable(String role, org.neo4j.cluster.InstanceId unavailableId) Logged when a member becomes unavailable as a role, such as MASTER or SLAVE.
void	unavailable() Logged when users are not allowed to access the database for transactions.
void	unelected(String role, org.neo4j.cluster.InstanceId instanceId, URI electedMember) Logged when an instance is demoted from a role.

Methods inherited from class java.lang.Object

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

Constructor Detail

HighAvailabilityLogger

public HighAvailabilityLogger(org.neo4j.logging.LogProvider logProvider,
                      org.neo4j.cluster.InstanceId myId)

Method Detail

enteredCluster

public void enteredCluster(org.neo4j.cluster.protocol.cluster.ClusterConfiguration clusterConfiguration)

Logged when the instance itself joins or rejoins a cluster

Specified by:

enteredCluster in interface org.neo4j.cluster.protocol.cluster.ClusterListener

Parameters:

clusterConfiguration -

leftCluster

public void leftCluster()

Logged when the instance itself leaves the cluster

Specified by:

leftCluster in interface org.neo4j.cluster.protocol.cluster.ClusterListener

joinedCluster

public void joinedCluster(org.neo4j.cluster.InstanceId instanceId,
                 URI member)

Logged when another instance joins the cluster

Specified by:

joinedCluster in interface org.neo4j.cluster.protocol.cluster.ClusterListener

Parameters:

instanceId -

member -

leftCluster

public void leftCluster(org.neo4j.cluster.InstanceId instanceId,
               URI member)

Logged when another instance leaves the cluster

Specified by:

leftCluster in interface org.neo4j.cluster.protocol.cluster.ClusterListener

Parameters:

instanceId -

elected

public void elected(String role,
           org.neo4j.cluster.InstanceId instanceId,
           URI electedMember)

Logged when an instance is elected for a role, such as coordinator of a cluster.

Specified by:

elected in interface org.neo4j.cluster.protocol.cluster.ClusterListener

Parameters:

role -

instanceId -

electedMember -

unelected

public void unelected(String role,
             org.neo4j.cluster.InstanceId instanceId,
             URI electedMember)

Logged when an instance is demoted from a role.

Specified by:

unelected in interface org.neo4j.cluster.protocol.cluster.ClusterListener

Parameters:

role -

instanceId -

electedMember -

coordinatorIsElected

public void coordinatorIsElected(org.neo4j.cluster.InstanceId coordinatorId)

Specified by:

coordinatorIsElected in interface org.neo4j.cluster.member.ClusterMemberListener

memberIsAvailable

public void memberIsAvailable(String role,
                     org.neo4j.cluster.InstanceId availableId,
                     URI atUri,
                     org.neo4j.kernel.impl.store.StoreId storeId)

Logged when a member becomes available as a role, such as MASTER or SLAVE.

Specified by:

memberIsAvailable in interface org.neo4j.cluster.member.ClusterMemberListener

Parameters:

role -

availableId - the role connection information for the new role holder

atUri - the URI at which the instance is available at

memberIsUnavailable

public void memberIsUnavailable(String role,
                       org.neo4j.cluster.InstanceId unavailableId)

Logged when a member becomes unavailable as a role, such as MASTER or SLAVE.

Specified by:

memberIsUnavailable in interface org.neo4j.cluster.member.ClusterMemberListener

Parameters:

role - The role for which the member is unavailable

unavailableId - The id of the member which became unavailable for that role

memberIsFailed

public void memberIsFailed(org.neo4j.cluster.InstanceId instanceId)

Logged when another instance is detected as being failed.

Specified by:

memberIsFailed in interface org.neo4j.cluster.member.ClusterMemberListener

Parameters:

instanceId -

memberIsAlive

public void memberIsAlive(org.neo4j.cluster.InstanceId instanceId)

Logged when another instance is detected as being alive again.

Specified by:

memberIsAlive in interface org.neo4j.cluster.member.ClusterMemberListener

Parameters:

instanceId -

available

public void available()

Logged when users are allowed to access the database for transactions.

Specified by:

available in interface org.neo4j.kernel.AvailabilityGuard.AvailabilityListener

unavailable

public void unavailable()

Logged when users are not allowed to access the database for transactions.

Specified by:

unavailable in interface org.neo4j.kernel.AvailabilityGuard.AvailabilityListener