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cpp20_protobuf.cpp
/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
*
* Distributed under the Boost Software License, Version 1.0. (See
* accompanying file LICENSE.txt)
*/
#include <boost/redis/connection.hpp>
#include <boost/redis/resp3/serialization.hpp>
#include <boost/asio/deferred.hpp>
#include <boost/asio/co_spawn.hpp>
#include <boost/asio/detached.hpp>
#include <boost/asio/consign.hpp>
#include <boost/system/errc.hpp>
#include <iostream>
// See the definition in person.proto. This header is automatically
// generated by CMakeLists.txt.
#include "person.pb.h"
#if defined(BOOST_ASIO_HAS_CO_AWAIT)
namespace asio = boost::asio;
using boost::redis::request;
using boost::redis::response;
using boost::redis::operation;
using boost::redis::ignore_t;
using boost::redis::config;
using boost::redis::connection;
// The protobuf type described in example/person.proto
using tutorial::person;
// Boost.Redis customization points (example/protobuf.hpp)
namespace tutorial
{
// Below I am using a Boost.Redis to indicate a protobuf error, this
// is ok for an example, users however might want to define their own
// error codes.
void boost_redis_to_bulk(std::string& to, person const& u)
{
std::string tmp;
if (!u.SerializeToString(&tmp))
throw boost::system::system_error(boost::redis::error::invalid_data_type);
boost::redis::resp3::boost_redis_to_bulk(to, tmp);
}
void boost_redis_from_bulk(person& u, std::string_view sv, boost::system::error_code& ec)
{
std::string const tmp {sv};
if (!u.ParseFromString(tmp))
ec = boost::redis::error::invalid_data_type;
}
} // tutorial
using tutorial::boost_redis_to_bulk;
using tutorial::boost_redis_from_bulk;
asio::awaitable<void> co_main(config cfg)
{
auto ex = co_await asio::this_coro::executor;
auto conn = std::make_shared<connection>(ex);
conn->async_run(cfg, {}, asio::consign(asio::detached, conn));
person p;
p.set_name("Louis");
p.set_id(3);
p.set_email("No email yet.");
request req;
req.push("SET", "protobuf-key", p);
req.push("GET", "protobuf-key");
response<ignore_t, person> resp;
// Sends the request and receives the response.
co_await conn->async_exec(req, resp, asio::deferred);
conn->cancel();
std::cout
<< "Name: " << std::get<1>(resp).value().name() << "\n"
<< "Age: " << std::get<1>(resp).value().id() << "\n"
<< "Email: " << std::get<1>(resp).value().email() << "\n";
}
#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)
boost::redis::connection
A basic_connection that type erases the executor.
Definition: connection.hpp:339
boost::redis::request
Creates Redis requests.
Definition: request.hpp:46
boost::redis::ignore_t
std::decay_t< decltype(std::ignore)> ignore_t
Type used to ignore responses.
Definition: ignore.hpp:31
boost::redis::response
std::tuple< adapter::result< Ts >... > response
Response with compile-time size.
Definition: response.hpp:25
boost::redis::operation
operation
Connection operations that can be cancelled.
Definition: operation.hpp:18
boost::redis::error::invalid_data_type
@ invalid_data_type
Invalid RESP3 type.
boost::redis::config
Configure parameters used by the connection classes.
Definition: config.hpp:30