Package org.apache.storm.scheduler.resource

Class ResourceAwareScheduler

java.lang.Object
org.apache.storm.scheduler.resource.ResourceAwareScheduler
All Implemented Interfaces:
INodeAssignmentSentCallBack, IScheduler
public class ResourceAwareScheduler extends Object implements IScheduler

  • Constructor Details

    • ResourceAwareScheduler

      public ResourceAwareScheduler()

  • Method Details

    • prepare

      public void prepare(Map<String,Object> conf, StormMetricsRegistry metricsRegistry)
      Specified by:
      prepare in interface IScheduler

    • cleanup

      public void cleanup()
      Description copied from interface: IScheduler
      called once when the system is shutting down, should be idempotent.
      Specified by:
      cleanup 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()`

    • getEvictedTopologiesMap

      public Map<String,Set<String>> getEvictedTopologiesMap()
      Return eviction information as map {scheduled topo : evicted topos} NOTE this method returns the map of a completed scheduling round. If scheduling is going on, this method will return a map of last scheduling round

      TODO: This method is only used for testing . It's subject to change if we plan to use this info elsewhere.

      Returns:
      a MAP of scheduled (topo : evicted) topos of most recent completed scheduling round