net.sf.jaccumulator

Enum ConcurrencyStrategy

java.lang.Object

java.lang.Enum<ConcurrencyStrategy>

net.sf.jaccumulator.ConcurrencyStrategy

All Implemented Interfaces:

Serializable, Comparable<ConcurrencyStrategy>

public enum ConcurrencyStrategy
extends Enum<ConcurrencyStrategy>

UML concurrency strategy

Since:

JAccumulator 4.0

Author:

Nicole Tedesco (Nicole@NicoleTedesco.com)

Enum Constant Summary

Enum Constants

Enum Constant and Description
ACTIVE Active entities run their own thread of control
CONCURRENT Multiple invocations of a behavioral feature may occur simultaneously to one instance and all of them may proceed concurrently.
GUARDED Multiple invocations of a behavioral feature may occur simultaneously to one instance, but only one is allowed to commence.
NULL No value, null, nothing, void, etc.
SEQUENTIAL No concurrency management mechanism is associated with the operation and, therefore, concurrency conflicts may occur.
UNKNOWN Not enough is known about the concurrency strategy for this entity

Method Summary

Methods

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

ACTIVE

public static final ConcurrencyStrategy ACTIVE

Active entities run their own thread of control

CONCURRENT

public static final ConcurrencyStrategy CONCURRENT

Multiple invocations of a behavioral feature may occur simultaneously to one instance and all of them may proceed concurrently.

GUARDED

public static final ConcurrencyStrategy GUARDED

Multiple invocations of a behavioral feature may occur simultaneously to one instance, but only one is allowed to commence. The others are blocked until the performance of the currently executing behavioral feature is complete. It is the responsibility of the system designer to ensure that deadlocks do not occur due to simultaneous blocks.

NULL

public static final ConcurrencyStrategy NULL

No value, null, nothing, void, etc.

SEQUENTIAL

public static final ConcurrencyStrategy SEQUENTIAL

No concurrency management mechanism is associated with the operation and, therefore, concurrency conflicts may occur. Instances that invoke a behavioral feature need to coordinate so that only one invocation to a target on any behavioral feature occurs at once.

UNKNOWN

public static final ConcurrencyStrategy UNKNOWN

Not enough is known about the concurrency strategy for this entity

Method Detail

values

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

Returns:

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

valueOf

public static ConcurrencyStrategy 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