message_traits< Request > Struct Template Reference

Traits template for mapping request types to their response types and message type enum values. More...

#include <message_traits.hpp>

Collaboration diagram for message_traits< Request >:

Detailed Description

template<typename Request>
struct ores::comms::messaging::message_traits< Request >

Traits template for mapping request types to their response types and message type enum values.

Each request/response message pair should specialize this template to provide compile-time type information. This enables simplified API usage where only the request type needs to be specified.

Example specialization:

template<>
struct message_traits<subscribe_request> {
    using request_type = subscribe_request;
    using response_type = subscribe_response;
    static constexpr message_type request_message_type =
        message_type::subscribe_request;
};

Usage with process_request:

// Old API (verbose):
auto result = client_->process_request<
    subscribe_request,
    subscribe_response,
    message_type::subscribe_request>(std::move(req));
 
// New API (using traits):
auto result = client_->process_request(std::move(req));

Note

This is complementary to event_traits in ores.eventing, which maps domain events to string names for the pub/sub notification system. message_traits maps request types to response types for RPC-style messaging.

Template Parameters

Request

The request type.