com.facebook.buck.util.concurrent

Enum ResourceAllocationFairness

java.lang.Object

java.lang.Enum<ResourceAllocationFairness>

com.facebook.buck.util.concurrent.ResourceAllocationFairness

All Implemented Interfaces:

Serializable, Comparable<ResourceAllocationFairness>

public enum ResourceAllocationFairness
extends Enum<ResourceAllocationFairness>

How to handle fairness when acquiring the semaphore.

Enum Constant Summary

Enum Constants

Enum Constant and Description
FAIR Make acquisitions happen in order.
FAST Move lower-permit count acquisitions that can acquire the lock ahead of high-count ones that are blocked due to size.

Method Summary

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

FAIR

public static final ResourceAllocationFairness FAIR

Make acquisitions happen in order. This may mean a high-permit count acquisition can block smaller ones queued behind it that could otherwise grab the semaphore.

FAST

public static final ResourceAllocationFairness FAST

Move lower-permit count acquisitions that can acquire the lock ahead of high-count ones that are blocked due to size.

Method Detail

values

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

Returns:

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

valueOf

public static ResourceAllocationFairness 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