org.apache.jackrabbit.oak.spi.cluster

Class ClusterRepositoryInfo

java.lang.Object

org.apache.jackrabbit.oak.spi.cluster.ClusterRepositoryInfo

public class ClusterRepositoryInfo
extends java.lang.Object

Utility class to manage a unique cluster/repository id for the cluster.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	CLUSTER_CONFIG_NODE
static java.lang.String	CLUSTER_ID_PROP
static java.lang.String	OAK_CLUSTERID_REPOSITORY_DESCRIPTOR_KEY

Method Summary

Modifier and Type	Method and Description
static @Nullable java.lang.String	getId(@NotNull NodeStore store)
static @Nullable java.lang.String	getOrCreateId(@NotNull NodeStore store) Gets the {# CLUSTER_ID_PROP} if available, if it doesn't it creates it and returns the newly created one (or if that happened concurrently and another cluster instance won, return that one)

Methods inherited from class java.lang.Object

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

Field Detail

OAK_CLUSTERID_REPOSITORY_DESCRIPTOR_KEY

public static final java.lang.String OAK_CLUSTERID_REPOSITORY_DESCRIPTOR_KEY

See Also:

Constant Field Values

CLUSTER_CONFIG_NODE

public static final java.lang.String CLUSTER_CONFIG_NODE

See Also:

Constant Field Values

CLUSTER_ID_PROP

public static final java.lang.String CLUSTER_ID_PROP

See Also:

Constant Field Values

Method Detail

getOrCreateId

@Nullable
public static @Nullable java.lang.String getOrCreateId(@NotNull
                                                                 @NotNull NodeStore store)

Gets the {# CLUSTER_ID_PROP} if available, if it doesn't it creates it and returns the newly created one (or if that happened concurrently and another cluster instance won, return that one)

Note that this method doesn't require synchronization as concurrent execution within the VM would be covered within NodeStore's merge and result in a conflict for one of the two threads - in which case the looser would re-read and find the clusterId set.

Parameters:

store - the NodeStore instance

Returns:

the persistent clusterId

getId

@Nullable
public static @Nullable java.lang.String getId(@NotNull
                                                         @NotNull NodeStore store)