com.hazelcast.util.concurrent

Class BackoffIdleStrategy

java.lang.Object

com.hazelcast.util.concurrent.BackoffIdleStrategy

All Implemented Interfaces:

IdleStrategy

public class BackoffIdleStrategy
extends Object
implements IdleStrategy

Idling strategy for threads when they have no work to do.

Spin for maxSpins, then Thread.yield() for maxYields, then LockSupport.parkNanos(long) on an exponential backoff to maxParkPeriodNs

Constructor Summary

Constructors

Constructor and Description
BackoffIdleStrategy(long maxSpins, long maxYields, long minParkPeriodNs, long maxParkPeriodNs) Create a set of state tracking idle behavior

Method Summary

Modifier and Type	Method and Description
static BackoffIdleStrategy	createBackoffIdleStrategy(String config) Creates a new BackoffIdleStrategy.
boolean	idle(long n) Perform current idle strategy's step n.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BackoffIdleStrategy

public BackoffIdleStrategy(long maxSpins,
                           long maxYields,
                           long minParkPeriodNs,
                           long maxParkPeriodNs)

Create a set of state tracking idle behavior

Parameters:

maxSpins - to perform before moving to Thread.yield()

maxYields - to perform before moving to LockSupport.parkNanos(long)

minParkPeriodNs - to use when initiating parking

maxParkPeriodNs - to use when parking

Method Detail

idle

public boolean idle(long n)

Perform current idle strategy's step n.

Specified by:

idle in interface IdleStrategy

Parameters:

n - number of times this method has been previously called with no intervening work done.

Returns:

whether the strategy has reached the longest pause time.

createBackoffIdleStrategy

public static BackoffIdleStrategy createBackoffIdleStrategy(String config)

Creates a new BackoffIdleStrategy.