Package org.eclipse.jetty.util

Enum Pool.StrategyType

java.lang.Object

java.lang.Enum<Pool.StrategyType>

org.eclipse.jetty.util.Pool.StrategyType

All Implemented Interfaces:

Serializable, Comparable<Pool.StrategyType>, java.lang.constant.Constable

Enclosing class:

Pool<T>

public static enum Pool.StrategyType
extends Enum<Pool.StrategyType>

The type of the strategy to use for the pool. The strategy primarily determines where iteration over the pool entries begins.

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
FIRST	A strategy that looks for an entry always starting from the first entry.
RANDOM	A strategy that looks for an entry by iterating from a random starting index.
ROUND_ROBIN	A strategy that looks for an entry by iterating from a starting point that is incremented on every search.
THREAD_ID	A strategy that uses the Thread.getId() of the current thread to select a starting point for an entry search.

Method Summary

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

FIRST

public static final Pool.StrategyType FIRST

A strategy that looks for an entry always starting from the first entry. It will favour the early entries in the pool, but may contend on them more.

RANDOM

public static final Pool.StrategyType RANDOM

A strategy that looks for an entry by iterating from a random starting index. No entries are favoured and contention is reduced.

THREAD_ID

public static final Pool.StrategyType THREAD_ID

A strategy that uses the Thread.getId() of the current thread to select a starting point for an entry search. Whilst not as performant as using the ThreadLocal cache, it may be suitable when the pool is substantially smaller than the number of available threads. No entries are favoured and contention is reduced.

ROUND_ROBIN

public static final Pool.StrategyType ROUND_ROBIN

A strategy that looks for an entry by iterating from a starting point that is incremented on every search. This gives similar results to the random strategy but with more predictable behaviour. No entries are favoured and contention is reduced.

Method Details

values

public static Pool.StrategyType[] 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 Pool.StrategyType 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