io.grpc

Interface MethodDescriptor.PrototypeMarshaller<T>

All Superinterfaces:

MethodDescriptor.Marshaller<T>, MethodDescriptor.ReflectableMarshaller<T>

Enclosing class:

MethodDescriptor<ReqT,RespT>

@ExperimentalApi(value="https://github.com/grpc/grpc-java/issues/2222")
public static interface MethodDescriptor.PrototypeMarshaller<T>
extends MethodDescriptor.ReflectableMarshaller<T>

A marshaller that uses a fixed instance of the type it produces.

Since:

1.1.0

Method Summary

Modifier and Type	Method and Description
T	getMessagePrototype() An instance of the expected message type, typically used as a schema and helper for producing other message instances.

Methods inherited from interface io.grpc.MethodDescriptor.ReflectableMarshaller

getMessageClass

Methods inherited from interface io.grpc.MethodDescriptor.Marshaller

parse, stream

Method Detail

getMessagePrototype

@Nullable
T getMessagePrototype()

An instance of the expected message type, typically used as a schema and helper for producing other message instances. The null value may be a special value for the marshaller (like the equivalent of Void), so it is a valid return value. null does not mean "unsupported" or "unknown".

It is generally expected this would return the same instance each invocation, but it is not a requirement.