Package org.apache.storm.scheduler
Interface IScheduler
- All Superinterfaces:
INodeAssignmentSentCallBack
- All Known Implementing Classes:
BlacklistScheduler
,DefaultScheduler
,EvenScheduler
,IsolationScheduler
,MultitenantScheduler
,ResourceAwareScheduler
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Method Summary
Modifier and TypeMethodDescriptiondefault void
cleanup()
called once when the system is shutting down, should be idempotent.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 interface org.apache.storm.scheduler.INodeAssignmentSentCallBack
nodeAssignmentSent
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Method Details
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prepare
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schedule
Set assignments for the topologies which needs scheduling. The new assignments is available through `cluster.getAssignments()`- 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
Map config()This function returns the scheduler's configuration.- Returns:
- The scheduler's configuration.
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cleanup
default void cleanup()called once when the system is shutting down, should be idempotent.
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