Package org.apache.storm.scheduler
Class DefaultScheduler
java.lang.Object
org.apache.storm.scheduler.DefaultScheduler
- All Implemented Interfaces:
INodeAssignmentSentCallBack,IScheduler
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionconfig()This function returns the scheduler's configuration.static voiddefaultSchedule(Topologies topologies, Cluster cluster) voidprepare(Map<String, Object> conf, StormMetricsRegistry metricsRegistry) voidschedule(Topologies topologies, Cluster cluster) Set assignments for the topologies which needs scheduling.static Set<WorkerSlot>slotsCanReassign(Cluster cluster, Set<WorkerSlot> slots) Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods inherited from interface org.apache.storm.scheduler.INodeAssignmentSentCallBack
nodeAssignmentSentMethods inherited from interface org.apache.storm.scheduler.IScheduler
cleanup
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Constructor Details
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DefaultScheduler
public DefaultScheduler()
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Method Details
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slotsCanReassign
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defaultSchedule
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prepare
- Specified by:
preparein interfaceIScheduler
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schedule
Description copied from interface:ISchedulerSet assignments for the topologies which needs scheduling. The new assignments is available through `cluster.getAssignments()`- Specified by:
schedulein interfaceIScheduler- 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()`
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config
Description copied from interface:ISchedulerThis function returns the scheduler's configuration.- Specified by:
configin interfaceIScheduler- Returns:
- The scheduler's configuration.
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