Package org.apache.kafka.streams.kstream.internals

Class KStreamFlatTransformValues.KStreamFlatTransformValuesProcessor<KIn,​VIn,​VOut>

  • All Implemented Interfaces:
    Processor<KIn,​VIn>
    Enclosing class:
    KStreamFlatTransformValues<KIn,​VIn,​VOut>
    public static class KStreamFlatTransformValues.KStreamFlatTransformValuesProcessor<KIn,​VIn,​VOut>
extends java.lang.Object
implements Processor<KIn,​VIn>

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void close()
      Close this processor and clean up any resources.
      void init​(ProcessorContext context)
      Initialize this processor with the given context.
      void process​(KIn key, VIn value)
      Process the record with the given key and value.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Method Detail

      • init

        public void init​(ProcessorContext context)
        Description copied from interface: Processor
        Initialize this processor with the given context. The framework ensures this is called once per processor when the topology that contains it is initialized. When the framework is done with the processor, Processor.close() will be called on it; the framework may later re-use the processor by calling #init() again.

        The provided context can be used to access topology and record meta data, to schedule a method to be called periodically and to access attached StateStores.

        Specified by:
        init in interface Processor<KIn,​VIn>
        Parameters:
        context - the context; may not be null

      • process

        public void process​(KIn key,
                    VIn value)
        Description copied from interface: Processor
        Process the record with the given key and value.
        Specified by:
        process in interface Processor<KIn,​VIn>
        Parameters:
        key - the key for the record
        value - the value for the record

      • close

        public void close()
        Description copied from interface: Processor
        Close this processor and clean up any resources. Be aware that #close() is called after an internal cleanup. Thus, it is not possible to write anything to Kafka as underlying clients are already closed. The framework may later re-use this processor by calling #init() on it again.

        Note: Do not close any streams managed resources, like StateStores here, as they are managed by the library.

        Specified by:
        close in interface Processor<KIn,​VIn>