Package org.apache.storm.scheduler

Class IsolationScheduler

java.lang.Object

org.apache.storm.scheduler.IsolationScheduler

All Implemented Interfaces:

INodeAssignmentSentCallBack, IScheduler

public class IsolationScheduler
extends Object
implements IScheduler

Constructor Summary

Constructors

Constructor	Description
IsolationScheduler()

Method Summary

Modifier and Type	Method	Description
Map<String,Map<String,Double>>	config()	This function returns the scheduler's configuration.
void	prepare(Map<String,Object> conf, StormMetricsRegistry metricsRegistry)
void	schedule(Topologies topologies, Cluster cluster)	Set assignments for the topologies which needs scheduling.

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.INodeAssignmentSentCallBack

nodeAssignmentSent

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

cleanup

Constructor Details

IsolationScheduler

public IsolationScheduler()

Method Details

prepare

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

Specified by:

prepare in interface IScheduler

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.

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()`