com.hazelcast.spi.partitiongroup

Enum PartitionGroupMetaData

java.lang.Object

java.lang.Enum<PartitionGroupMetaData>

com.hazelcast.spi.partitiongroup.PartitionGroupMetaData

All Implemented Interfaces:

Serializable, Comparable<PartitionGroupMetaData>

public enum PartitionGroupMetaData
extends Enum<PartitionGroupMetaData>

This class contains the definition of known Discovery SPI metadata to support automatic generation of zone aware and node aware backup strategies. Zone aware backup strategies are based on cloud or service discovery provided information. These information are split into three different levels of granularity:

• Zone: A low-latency link between (virtual) data centers in the same area
• Rack: A low-latency link inside the same data center but for different racks
• Host: A low-latency link on a shared physical node, in case of virtualization being used

Node aware backup strategy is based on name of the node which is provided by container orchestration tool. like Kubernetes, Docker Swarm and ECS. A node is the term used to refer machine that containers/pods run on. A node may be a virtual or physical machine. Placement aware backup strategy is based on the placement strategies of the virtual machines on which Hazelcast members run. Unlike zone aware, this strategy can group members within a single availability zone based on their racks, power sources, network, etc.

Field Summary

Fields

Modifier and Type	Field and Description
static String	PARTITION_GROUP_HOST Deprecated.
static String	PARTITION_GROUP_NODE Metadata key definition for a node machine that containers/pods run on, in case of container orchestration tools being used.
static String	PARTITION_GROUP_PLACEMENT Metadata key definition for the placement group to which VMs belong if a placement strategy is applied by cloud providers.
static String	PARTITION_GROUP_RACK Deprecated.
static String	PARTITION_GROUP_ZONE Metadata key definition for a low-latency link between (virtual) data centers in the same area

Method Summary

Modifier and Type	Method and Description
static PartitionGroupMetaData	valueOf(String name) Returns the enum constant of this type with the specified name.
static PartitionGroupMetaData[]	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

Field Detail

PARTITION_GROUP_ZONE

public static final String PARTITION_GROUP_ZONE

Metadata key definition for a low-latency link between (virtual) data centers in the same area

See Also:

Constant Field Values

PARTITION_GROUP_RACK

@Deprecated
public static final String PARTITION_GROUP_RACK

Deprecated.

Metadata key definition for a low-latency link inside the same data center but for different racks. This field is maintained for backward compatibility.Its use is discouraged and will be removed in a future version.

See Also:

Constant Field Values

PARTITION_GROUP_HOST

@Deprecated
public static final String PARTITION_GROUP_HOST

Deprecated.

Metadata key definition for a low-latency link on a shared physical node, in case of virtualization being used. This field is maintained for backward compatibility.Its use is discouraged and will be removed in a future version.

See Also:

Constant Field Values

PARTITION_GROUP_NODE

public static final String PARTITION_GROUP_NODE

Metadata key definition for a node machine that containers/pods run on, in case of container orchestration tools being used.

See Also:

Constant Field Values

PARTITION_GROUP_PLACEMENT

public static final String PARTITION_GROUP_PLACEMENT

Metadata key definition for the placement group to which VMs belong if a placement strategy is applied by cloud providers.

See Also:

Constant Field Values

Method Detail

values

public static PartitionGroupMetaData[] 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 (PartitionGroupMetaData c : PartitionGroupMetaData.values())
    System.out.println(c);

Returns:

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

valueOf

public static PartitionGroupMetaData valueOf(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:

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

NullPointerException - if the argument is null