ControllerEventProcessor

ControllerEventProcessor is the abstraction of processors that can process and preempt controller events.

Table 1. ControllerEventProcessor Contract
Method	Description
`preempt`	`preempt( event: ControllerEvent): Unit` Preempts a controller event Used exclusively when `QueuedEvent` is requested to preempt a ControllerEventProcessor
`process`	`process( event: ControllerEvent): Unit` Processes a controller event Used exclusively when `QueuedEvent` is requested to process a ControllerEventProcessor

Note	KafkaController is the default and only known implementation of the ControllerEventProcessor Contract in Apache Kafka.

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