Package oracle.fabric.blocks.event

Enum Class ConsistencyLevel

java.lang.Object

java.lang.Enum<ConsistencyLevel>

oracle.fabric.blocks.event.ConsistencyLevel

All Implemented Interfaces:

Serializable, Comparable<ConsistencyLevel>, java.lang.constant.Constable

public enum ConsistencyLevel
extends Enum<ConsistencyLevel>

Consistency level for BusinessEvent subscriptions.

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
GUARANTEED_DELIVERY	The event is guaranteed to arrive.
IMMEDIATE	Deprecated.
JOIN	The event will be delivered on the thread/transaction that dequeues the message.
ONE_AND_ONLY_ONE	The event will arrive once and only once.

Method Summary

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

Methods inherited from class java.lang.Enum

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

ONE_AND_ONLY_ONE

public static final ConsistencyLevel ONE_AND_ONLY_ONE

The event will arrive once and only once. This is the stronger (but less efficient) of the consistency levels. Before delivery of the event, the BusinessEventBus will create a new global transaction. If the BusinessEventProcessor returns normally, the transaction will be committed. If an exception is thrown, the BusinessEventProcessor will retry up to a configured (at the bus level) number of times. Once the retry limit is passed it will be placed in a "dead event" queue.

GUARANTEED_DELIVERY

public static final ConsistencyLevel GUARANTEED_DELIVERY

The event is guaranteed to arrive. Duplicates are possible. This is the weaker (but more efficient) of the consistency levels. The event will be delivered to the BusinessEventProcessor. Once the processor returns control, the event will be considered delivered -- even if control is returned via an exception.

JOIN

public static final ConsistencyLevel JOIN

The event will be delivered on the thread/transaction that dequeues the message. Any exception will cause the dequeue to be rolled back.

IMMEDIATE

@Deprecated
public static final ConsistencyLevel IMMEDIATE

Deprecated.

The event will be delivered on the publisher's thread and transaction. Any exceptions thrown by the subscriber will be caught, logged and then ignored.

Method Details

values

public static ConsistencyLevel[] 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 ConsistencyLevel 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

isHigher

public boolean isHigher(ConsistencyLevel level)

fromString

public static ConsistencyLevel fromString(String s)