Package org.acemq.amqp.api

Enum TopologyPlan.Kind

java.lang.Object

java.lang.Enum<TopologyPlan.Kind>

org.acemq.amqp.api.TopologyPlan.Kind

All Implemented Interfaces:

Serializable, Comparable<TopologyPlan.Kind>

Enclosing class:

TopologyPlan

public static enum TopologyPlan.Kind
extends Enum<TopologyPlan.Kind>

What a plan proposes to do about one item.

Enum Constant Summary

Enum Constants

Enum Constant	Description
CREATE	The item is missing and would be created.
DRIFT	The item exists with settings the topology disagrees with.
PRESENT	The item already exists and would be left alone.
UNKNOWN	The item exists and this transport cannot say whether it matches.

Method Summary

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

CREATE

public static final TopologyPlan.Kind CREATE

The item is missing and would be created.

PRESENT

public static final TopologyPlan.Kind PRESENT

The item already exists and would be left alone.

DRIFT

public static final TopologyPlan.Kind DRIFT

The item exists with settings the topology disagrees with.

Not a change, because applying will not resolve it. AMQP forbids altering most queue arguments in place, so the declare fails and takes the channel with it. Someone has to decide between changing the topology to match the broker and migrating the queue.

UNKNOWN

public static final TopologyPlan.Kind UNKNOWN

The item exists and this transport cannot say whether it matches.

Deliberately not PRESENT: an unanswered question reported as agreement is how drift goes unnoticed until a deployment.

Method Details

values

public static TopologyPlan.Kind[] values()

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

Returns:

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

valueOf

public static TopologyPlan.Kind 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