Github user BuDongDong commented on the pull request:
https://github.com/apache/storm/pull/312#issuecomment-63206771
@harshach the "get-task-object" is called by "mk-task-data" function in
task.clj, "mk-task-data" is defined as following:
(defn mk-task-data [executor-data task-id]
(recursive-map
:executor-data executor-data
:task-id task-id
:system-context (system-topology-context (:worker executor-data)
executor-data task-id)
:user-context (user-topology-context (:worker executor-data)
executor-data task-id)
:builtin-metrics (builtin-metrics/make-data (:type executor-data))
:tasks-fn (mk-tasks-fn <>)
:object (get-task-object (.getRawTopology ^TopologyContext
(:system-context <>)) (:component-id executor-data))))
(:system-context <>) return TopologyContext instance, TopologyContext
extends GeneralTopologyContext, the TopologyContext instance has StormTopology
_topology. âgetRawTopologyâ method of TopologyContext must return
StormTopology _topology. (.getRawTopology ^TopologyContext (:system-context <>)
return StormTopology instance not TopologyContext instance. so the type of
param topology is StormTopology not TopologyContext.
at the same time, "get-task-object" call "get_spouts" and "get_bolts" of
the param topology. you can find the "get_spouts" and "get_bolts" function are
only defined in StormTopology, and StormTopology is not a subclass of
TopologyContext. so i think the type of param topology is StormTopology not
TopologyContext.
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