com.hazelcast.cp.internal.persistence

Class NopCPMetadataStore

java.lang.Object

com.hazelcast.cp.internal.persistence.NopCPMetadataStore

All Implemented Interfaces:

CPMetadataStore

public final class NopCPMetadataStore
extends Object
implements CPMetadataStore

Used when CP Subsystem works transiently (its state is not persisted).

Field Summary

Fields

Modifier and Type	Field and Description
static CPMetadataStore	INSTANCE

Method Summary

Modifier and Type	Method and Description
boolean	hasMetadata() Returns true if this member has metadata persisted on the storage layer.
boolean	isMarkedAPMember() Returns true if this member is marked as AP member on the storage layer.
void	persistLocalCPMember(CPMember member) Persists CPMember identity of the local member to storage.
void	persistMetadataGroupId(RaftGroupId groupId) Persists group id of the METADATA group.
CPMember	readLocalCPMember() Reads CPMember identity of this member from storage.
RaftGroupId	readMetadataGroupId() Reads group id of the METADATA group, or reads null if METADATA group id has not changed
boolean	tryMarkAPMember() Marks this member as AP member on the storage layer, if it is not a CP member already.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final CPMetadataStore INSTANCE

Method Detail

isMarkedAPMember

public boolean isMarkedAPMember()

Description copied from interface: CPMetadataStore

Returns true if this member is marked as AP member on the storage layer. If false is returned, it means that AP/CP identity of the member is not not known yet CP member discovery will run.

Specified by:

isMarkedAPMember in interface CPMetadataStore

tryMarkAPMember

public boolean tryMarkAPMember()

Description copied from interface: CPMetadataStore

Marks this member as AP member on the storage layer, if it is not a CP member already.

Specified by:

tryMarkAPMember in interface CPMetadataStore

Returns:

true if marked as AP, false otherwise

hasMetadata

public boolean hasMetadata()

Description copied from interface: CPMetadataStore

Returns true if this member has metadata persisted on the storage layer.

Specified by:

hasMetadata in interface CPMetadataStore

persistLocalCPMember

public void persistLocalCPMember(CPMember member)

Description copied from interface: CPMetadataStore

Persists CPMember identity of the local member to storage.

Specified by:

persistLocalCPMember in interface CPMetadataStore

readLocalCPMember

public CPMember readLocalCPMember()

Description copied from interface: CPMetadataStore

Reads CPMember identity of this member from storage. If null is returned, it means that AP/CP identity of the member is not not known yet CP member discovery will run.

Specified by:

readLocalCPMember in interface CPMetadataStore

persistMetadataGroupId

public void persistMetadataGroupId(RaftGroupId groupId)

Description copied from interface: CPMetadataStore

Persists group id of the METADATA group.

Specified by:

persistMetadataGroupId in interface CPMetadataStore

readMetadataGroupId

public RaftGroupId readMetadataGroupId()

Description copied from interface: CPMetadataStore

Reads group id of the METADATA group, or reads null if METADATA group id has not changed

Specified by:

readMetadataGroupId in interface CPMetadataStore