mirror of
https://github.com/boostorg/redis.git
synced 2026-01-19 16:52:08 +00:00
95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
/* 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 "common.hpp"
|
|
|
|
#if defined(BOOST_ASIO_HAS_CO_AWAIT)
|
|
#include <boost/asio/experimental/awaitable_operators.hpp>
|
|
#include <iostream>
|
|
|
|
namespace net = boost::asio;
|
|
using namespace net::experimental::awaitable_operators;
|
|
using resolver = net::use_awaitable_t<>::as_default_on_t<net::ip::tcp::resolver>;
|
|
using timer_type = net::use_awaitable_t<>::as_default_on_t<net::steady_timer>;
|
|
using aedis::resp3::request;
|
|
using aedis::adapt;
|
|
using aedis::operation;
|
|
|
|
// Include this in no more than one .cpp file.
|
|
#include <aedis/src.hpp>
|
|
|
|
namespace
|
|
{
|
|
auto redir(boost::system::error_code& ec)
|
|
{ return net::redirect_error(net::use_awaitable, ec); }
|
|
}
|
|
|
|
auto healthy_checker(std::shared_ptr<connection> conn) -> net::awaitable<void>
|
|
{
|
|
try {
|
|
request req;
|
|
req.get_config().cancel_on_connection_lost = true;
|
|
req.push("PING");
|
|
|
|
timer_type timer{co_await net::this_coro::executor};
|
|
|
|
for (boost::system::error_code ec;;) {
|
|
timer.expires_after(std::chrono::seconds{1});
|
|
co_await (conn->async_exec(req, adapt()) || timer.async_wait(redir(ec)));
|
|
|
|
if (!ec) {
|
|
co_return;
|
|
}
|
|
|
|
// Waits some time before trying the next ping.
|
|
timer.expires_after(std::chrono::seconds{1});
|
|
co_await timer.async_wait();
|
|
}
|
|
} catch (...) {
|
|
}
|
|
}
|
|
|
|
auto
|
|
connect(
|
|
std::shared_ptr<connection> conn,
|
|
std::string const& host,
|
|
std::string const& port) -> net::awaitable<void>
|
|
{
|
|
auto ex = co_await net::this_coro::executor;
|
|
resolver resv{ex};
|
|
timer_type timer{ex};
|
|
|
|
boost::system::error_code ec;
|
|
timer.expires_after(std::chrono::seconds{5});
|
|
auto const addrs = co_await (resv.async_resolve(host, port) || timer.async_wait(redir(ec)));
|
|
if (!ec)
|
|
throw std::runtime_error("Resolve timeout");
|
|
|
|
timer.expires_after(std::chrono::seconds{5});
|
|
co_await (net::async_connect(conn->next_layer(), std::get<0>(addrs)) || timer.async_wait(redir(ec)));
|
|
if (!ec)
|
|
throw std::runtime_error("Connect timeout");
|
|
}
|
|
|
|
extern net::awaitable<void> async_main();
|
|
|
|
// Main function used in our examples.
|
|
auto main() -> int
|
|
{
|
|
try {
|
|
net::io_context ioc;
|
|
net::co_spawn(ioc, async_main(), net::detached);
|
|
ioc.run();
|
|
} catch (std::exception const& e) {
|
|
std::cerr << "Error: " << e.what() << std::endl;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
#else // defined(BOOST_ASIO_HAS_CO_AWAIT)
|
|
auto main() -> int {std::cout << "Requires coroutine support." << std::endl; return 0;}
|
|
#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)
|