io.zeebe.util.sched

Class PriorityScheduler

java.lang.Object

io.zeebe.util.sched.PriorityScheduler

All Implemented Interfaces:

TaskScheduler

public class PriorityScheduler
extends Object
implements TaskScheduler

Logic and state for the priority scheduling. Each ActorThread maintains a local instance if this class.

Constructor Summary

Constructors

Constructor and Description
PriorityScheduler(java.util.function.IntFunction<ActorTask> getTaskFn, double[] quotas)

Method Summary

Modifier and Type	Method and Description
ActorTask	getNextTask(ActorClock clock) calculates and returns the next task to execute or null if no such task can be determined.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.zeebe.util.sched.TaskScheduler

onTaskReleased

Constructor Detail

PriorityScheduler

public PriorityScheduler(java.util.function.IntFunction<ActorTask> getTaskFn,
                         double[] quotas)

Parameters:

getTaskFn - function which can be used to get a task by a given priority class.

quotas - the quotas by priority class. Must be an array of doubles, assigning a quota to the priority denoted by the index in the array (if quotas[0] = 0.3, then the quota for the priority class '0' is 0.3). A quota must be a number between [0..1], such that the sum of all quotas in the array is exactly 1. The quota multiplied by 100 corresponds to the number of time slices assigned to this priority class in a second.

Method Detail

getNextTask

public ActorTask getNextTask(ActorClock clock)

calculates and returns the next task to execute or null if no such task can be determined.

Specified by:

getNextTask in interface TaskScheduler