Adding Functionality to Apache NiFi
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Methods with this annotation will be called whenever a Processor or ReportingTask is no longer scheduled to run. At that time, many threads may still be active in the Processor's onTrigger method. If such a method throws an Exception, a log message will be generated, and the Exception will be otherwise ignored and other methods with this annotation will still be invoked. Methods with this annotation may take zero arguments or may take a single argument. If the single argument variation is used, the argument must be of type ProcessContext if the component is a Processor or ConfigurationContext if the component is a ReportingTask.