com.neeve.util

Enum UtlGovernor.WaitStrategy

java.lang.Object

java.lang.Enum<UtlGovernor.WaitStrategy>

com.neeve.util.UtlGovernor.WaitStrategy

All Implemented Interfaces:

Serializable, Comparable<UtlGovernor.WaitStrategy>

Enclosing class:

UtlGovernor

public static enum UtlGovernor.WaitStrategy
extends Enum<UtlGovernor.WaitStrategy>

Enumerates the set of wait strategies used by the UtlGovernor in #b

Enum Constant Summary

Enum Constants

Enum Constant and Description
BusySpin With this strategy blockToNext will spin waiting for the next time.
Sleep With this strategy blockToNext will sleep until the calculated time at which the next operation should be performed.
Yield With this strategy blockToNext will call Thread.yield() in a loop until it is time to perform the next operation.

Method Summary

Methods

Modifier and Type	Method and Description
static UtlGovernor.WaitStrategy	valueOf(String name) Returns the enum constant of this type with the specified name.
static UtlGovernor.WaitStrategy[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

BusySpin

public static final UtlGovernor.WaitStrategy BusySpin

With this strategy blockToNext will spin waiting for the next time. This strategy is optimal for performance as it avoids context switching.

Yield

public static final UtlGovernor.WaitStrategy Yield

With this strategy blockToNext will call Thread.yield() in a loop until it is time to perform the next operation. This strategy is good for cases where there may not be an adequate number of cpus or governors are being used across a pool of Threads sharing a few cores.

Sleep

public static final UtlGovernor.WaitStrategy Sleep

With this strategy blockToNext will sleep until the calculated time at which the next operation should be performed. This strategy is good for conserving CPU especially in cases where the target rate is low enough that sleep provides good enough resolution to achieve the target rate of operations and BusySpin or Yielding policies would be overkill.

Method Detail

values

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

Returns:

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

valueOf

public static UtlGovernor.WaitStrategy 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