Enum Class TaskState

java.lang.Object

java.lang.Enum<TaskState>

org.j7m.middleware.workload.api.TaskState

All Implemented Interfaces:

Serializable, Comparable<TaskState>, Constable

public enum TaskState
extends Enum<TaskState>

Stable lifecycle states for a middleware workload task.

The enum is immutable and thread-safe. State transitions are owned by a WorkloadScheduler; implementations may support only the transitions documented by that scheduler and must not claim durable or exactly-once execution semantics.

Nested Class Summary

Nested classes/interfaces inherited from class Enum

Enum.EnumDesc<E>

Enum Constant Summary

Enum Constants

Enum Constant	Description
CANCELLED	The task stopped because cancellation completed.
CANCELLING	Cancellation has been requested and is being delivered.
CHECKPOINTING	A checkpoint is being recorded.
COMPLETED	The task completed successfully.
EXPIRED	The task expired before valid ownership or completion.
FAILED	The task failed with a middleware or application failure.
FENCED	The task owner used a stale fencing token.
LEASED	A worker owns a live task lease.
QUEUED	The task is waiting for capacity or a lease owner.
RUNNING	A worker is actively executing the task.
SUBMITTED	The scheduler accepted the task descriptor.

Method Summary

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

Methods inherited from class Enum

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

Methods inherited from class Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

SUBMITTED

public static final TaskState SUBMITTED

The scheduler accepted the task descriptor.

QUEUED

public static final TaskState QUEUED

The task is waiting for capacity or a lease owner.

LEASED

public static final TaskState LEASED

A worker owns a live task lease.

RUNNING

public static final TaskState RUNNING

A worker is actively executing the task.

CANCELLING

public static final TaskState CANCELLING

Cancellation has been requested and is being delivered.

CANCELLED

public static final TaskState CANCELLED

The task stopped because cancellation completed.

CHECKPOINTING

public static final TaskState CHECKPOINTING

A checkpoint is being recorded.

COMPLETED

public static final TaskState COMPLETED

The task completed successfully.

FAILED

public static final TaskState FAILED

The task failed with a middleware or application failure.

EXPIRED

public static final TaskState EXPIRED

The task expired before valid ownership or completion.

FENCED

public static final TaskState FENCED

The task owner used a stale fencing token.

Method Details

values

public static TaskState[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

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

valueOf

public static TaskState valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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 class has no constant with the specified name

NullPointerException - if the argument is null