org.apache.storm.scheduler

Class EvenScheduler

java.lang.Object

org.apache.storm.scheduler.EvenScheduler

All Implemented Interfaces:

INodeAssignmentSentCallBack, IScheduler

public class EvenScheduler
extends Object
implements IScheduler

Constructor Summary

Constructors

Constructor and Description
EvenScheduler()

Method Summary

Modifier and Type	Method and Description
Map<String,Map<String,Double>>	config() This function returns the scheduler’s configuration.
static Map<WorkerSlot,List<ExecutorDetails>>	getAliveAssignedWorkerSlotExecutors(Cluster cluster, String topologyId)
void	prepare(Map<String,Object> conf, StormMetricsRegistry metricsRegistry)
void	schedule(Topologies topologies, Cluster cluster) Set assignments for the topologies which needs scheduling.
static void	scheduleTopologiesEvenly(Topologies topologies, Cluster cluster)
static List<WorkerSlot>	sortSlots(List<WorkerSlot> availableSlots)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.storm.scheduler.IScheduler

cleanup

Methods inherited from interface org.apache.storm.scheduler.INodeAssignmentSentCallBack

nodeAssignmentSent

Constructor Detail

EvenScheduler

public EvenScheduler()

Method Detail

sortSlots

public static List<WorkerSlot> sortSlots(List<WorkerSlot> availableSlots)

getAliveAssignedWorkerSlotExecutors

public static Map<WorkerSlot,List<ExecutorDetails>> getAliveAssignedWorkerSlotExecutors(Cluster cluster,
                                                                                        String topologyId)

scheduleTopologiesEvenly

public static void scheduleTopologiesEvenly(Topologies topologies,
                                            Cluster cluster)

prepare

public void prepare(Map<String,Object> conf,
                    StormMetricsRegistry metricsRegistry)

Specified by:

prepare in interface IScheduler

schedule

public void schedule(Topologies topologies,
                     Cluster cluster)

Description copied from interface: IScheduler

Set assignments for the topologies which needs scheduling. The new assignments is available through cluster.getAssignments()

Specified by:

schedule in interface IScheduler

Parameters:

topologies - all the topologies in the cluster, some of them need schedule. Topologies object here only contain static information about topologies. Information like assignments, slots are all in the cluster object.

cluster - the cluster these topologies are running in. cluster contains everything user need to develop a new scheduling logic. e.g. supervisors information, available slots, current assignments for all the topologies etc. User can set the new assignment for topologies using cluster.setAssignmentById()`

config

public Map<String,Map<String,Double>> config()

Description copied from interface: IScheduler

This function returns the scheduler’s configuration.

Specified by:

config in interface IScheduler

Returns:

The scheduler’s configuration.