public interface IWorkerHook extends Serializable
An IWorkerHook represents a topology component that can be executed when a worker starts, and when a worker shuts down. It can be useful when you want to execute operations before topology processing starts, or cleanup operations before your workers shut down.
void start(Map stormConf, WorkerTopologyContext context)
This method is called when a worker is started
stormConf- The Storm configuration for this worker
context- This object can be used to get information about this worker’s place within the topology
This method is called right before a worker shuts down
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