Interface Writeable.Reader<V>

All Known Subinterfaces:
All Known Implementing Classes:
ActionListenerResponseHandler, EmptyTransportResponseHandler, FutureTransportResponseHandler, PlainTransportFuture, TransportResponseHandler.Empty, TransportService.ContextRestoreResponseHandler
Enclosing interface:
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface public static interface Writeable.Reader<V>
Reference to a method that can read some object from a stream. By convention this is a constructor that takes StreamInput as an argument for most classes and a static method for things like enums. Returning null from one of these is always wrong - for that we use methods like StreamInput.readOptionalWriteable(Reader).

As most classes will implement this via a constructor (or a static method in the case of enumerations), it's something that should look like:

 public MyClass(final StreamInput in) throws IOException {
     this.someValue = in.readVInt();
     this.someMap = in.readMapOfLists(StreamInput::readString, StreamInput::readString);
  • Method Summary

    Modifier and Type
    Read V-type value from a stream.