Class ResourceAwareScheduler
java.lang.Object
org.apache.storm.scheduler.resource.ResourceAwareScheduler
- All Implemented Interfaces:
INodeAssignmentSentCallBack
,IScheduler
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionvoid
cleanup()
called once when the system is shutting down, should be idempotent.config()
This function returns the scheduler's configuration.Return eviction information as map {scheduled topo : evicted topos} NOTE this method returns the map of a completed scheduling round.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
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Constructor Details
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ResourceAwareScheduler
public ResourceAwareScheduler()
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Method Details
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prepare
- Specified by:
prepare
in interfaceIScheduler
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cleanup
public void cleanup()Description copied from interface:IScheduler
called once when the system is shutting down, should be idempotent.- Specified by:
cleanup
in interfaceIScheduler
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config
Description copied from interface:IScheduler
This function returns the scheduler's configuration.- Specified by:
config
in interfaceIScheduler
- Returns:
- The scheduler's configuration.
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schedule
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 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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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 roundTODO: 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
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