Package org.osgi.util.pushstream

Enum Class QueuePolicyOption

java.lang.Object

java.lang.Enum<QueuePolicyOption>

org.osgi.util.pushstream.QueuePolicyOption

All Implemented Interfaces:

Serializable, Comparable<QueuePolicyOption>, Constable

public enum QueuePolicyOption
extends Enum<QueuePolicyOption>

QueuePolicyOption provides a standard set of simple QueuePolicy implementations.

See Also:

• QueuePolicy

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
BLOCK	Attempt to add the supplied event to the queue, blocking until the enqueue is successful.
DISCARD_OLDEST	Attempt to add the supplied event to the queue.
FAIL	Attempt to add the supplied event to the queue, throwing an exception if the queue is full.

Method Summary

Modifier and Type	Method	Description
abstract <T, U extends BlockingQueue<PushEvent<? extends T>>> QueuePolicy<T,U>	getPolicy()
static QueuePolicyOption	valueOf(String name)	Returns the enum constant of this class with the specified name.
static QueuePolicyOption[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

DISCARD_OLDEST

public static final QueuePolicyOption DISCARD_OLDEST

Attempt to add the supplied event to the queue. If the queue is unable to immediately accept the value then discard the value at the head of the queue and try again. Repeat this process until the event is enqueued.

BLOCK

public static final QueuePolicyOption BLOCK

Attempt to add the supplied event to the queue, blocking until the enqueue is successful.

FAIL

public static final QueuePolicyOption FAIL

Attempt to add the supplied event to the queue, throwing an exception if the queue is full.

Method Details

values

public static QueuePolicyOption[] 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 QueuePolicyOption 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

getPolicy

public abstract <T,
U extends BlockingQueue<PushEvent<? extends T>>>
QueuePolicy<T,U> getPolicy()

Returns:

a QueuePolicy implementation