Package org.apache.kafka.streams.processor

Interface ProcessorSupplier<K,​V>

  • Type Parameters:
    K - the type of keys
    V - the type of values
    All Superinterfaces:
    ConnectedStoreProvider, Supplier<Processor<K,​V>>
    public interface ProcessorSupplier<K,​V>
extends ConnectedStoreProvider, Supplier<Processor<K,​V>>
    A processor supplier that can create one or more Processor instances.

    It is used in Topology for adding new processor operators, whose generated topology can then be replicated (and thus creating one or more Processor instances) and distributed to multiple stream threads.

    The supplier should always generate a new instance each time get() gets called. Creating a single Processor object and returning the same object reference in get() would be a violation of the supplier pattern and leads to runtime exceptions.

    • Method Detail

      • get

        Processor<K,​V> get()
        Return a newly constructed Processor instance. The supplier should always generate a new instance each time get() gets called.

        Creating a single Processor object and returning the same object reference in get() is a violation of the supplier pattern and leads to runtime exceptions.

        Specified by:
        get in interface Supplier<K>
        Returns:
        a newly constructed Processor instance