com.kabira.platform.highavailability

Enum PartitionManager.EnableAction

java.lang.Object

java.lang.Enum<PartitionManager.EnableAction>

com.kabira.platform.highavailability.PartitionManager.EnableAction

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<PartitionManager.EnableAction>

Enclosing class:

PartitionManager

public static enum PartitionManager.EnableAction
extends java.lang.Enum<PartitionManager.EnableAction>

An enumeration of the possible actions that can be taken when enabling high availability for a node.

Enum Constant Summary

Enum Constants

Enum Constant and Description
JOIN_CLUSTER Perform any object migrations needed to activate the partitions defined for this node.
JOIN_CLUSTER_PURGE Before migrating the partition data, remove any instances that exist on the local node.
JOIN_CLUSTER_RESTORE For all partitions where the node joining the cluster is the current active node, access the remote node where the partition should be restored from, and compare the objects between the local node and remote node.

Method Summary

Modifier and Type	Method and Description
static PartitionManager.EnableAction	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static PartitionManager.EnableAction[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

JOIN_CLUSTER

public static final PartitionManager.EnableAction JOIN_CLUSTER

Perform any object migrations needed to activate the partitions defined for this node. This option should be used for newly added nodes.

JOIN_CLUSTER_PURGE

public static final PartitionManager.EnableAction JOIN_CLUSTER_PURGE

Before migrating the partition data, remove any instances that exist on the local node. This option should be used for nodes where the local data doesn't need to be preserved.

JOIN_CLUSTER_RESTORE

public static final PartitionManager.EnableAction JOIN_CLUSTER_RESTORE

For all partitions where the node joining the cluster is the current active node, access the remote node where the partition should be restored from, and compare the objects between the local node and remote node. If an object on the local node has been updated, or a new object created, push the update to the remote node. If the remote node has been updated, replicate the change to the local node. If a state conflict is detected, or a duplicate key is found, remove the local object and copy the remote node object to the local node.

For all partitions where the node joining the cluster is acting as a replica, the replica objects are deleted and instances migrated from the remote node.

Warning: This is performance hostile, and should only be done when resolving a split-brain scenario in a cluster.

See Also:

Partition.Properties.restoreFromNode(String)

Method Detail

values

public static PartitionManager.EnableAction[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (PartitionManager.EnableAction c : PartitionManager.EnableAction.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static PartitionManager.EnableAction valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null