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<String,Object> topoConf, WorkerTopologyContext context)
This method is called when a worker is started.
topoConf - 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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