mirror of
https://github.com/boostorg/redis.git
synced 2026-01-19 04:42:09 +00:00
90 lines
2.5 KiB
C++
90 lines
2.5 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 <boost/redis/connection.hpp>
|
|
#include <boost/redis/logger.hpp>
|
|
#include <boost/asio/awaitable.hpp>
|
|
#include <boost/asio/use_awaitable.hpp>
|
|
#include <boost/asio/deferred.hpp>
|
|
#include <boost/asio/co_spawn.hpp>
|
|
#include <boost/asio/detached.hpp>
|
|
#include <boost/asio/consign.hpp>
|
|
#include <boost/asio/redirect_error.hpp>
|
|
#include <boost/asio/signal_set.hpp>
|
|
#include <iostream>
|
|
|
|
#if defined(BOOST_ASIO_HAS_CO_AWAIT)
|
|
|
|
namespace net = boost::asio;
|
|
using namespace std::chrono_literals;
|
|
using boost::redis::request;
|
|
using boost::redis::generic_response;
|
|
using boost::redis::logger;
|
|
using boost::redis::config;
|
|
using boost::redis::ignore;
|
|
using boost::system::error_code;
|
|
using boost::redis::connection;
|
|
using signal_set = net::deferred_t::as_default_on_t<net::signal_set>;
|
|
|
|
/* This example will subscribe and read pushes indefinitely.
|
|
*
|
|
* To test send messages with redis-cli
|
|
*
|
|
* $ redis-cli -3
|
|
* 127.0.0.1:6379> PUBLISH channel some-message
|
|
* (integer) 3
|
|
* 127.0.0.1:6379>
|
|
*
|
|
* To test reconnection try, for example, to close all clients currently
|
|
* connected to the Redis instance
|
|
*
|
|
* $ redis-cli
|
|
* > CLIENT kill TYPE pubsub
|
|
*/
|
|
|
|
// Receives server pushes.
|
|
auto
|
|
receiver(std::shared_ptr<connection> conn) -> net::awaitable<void>
|
|
{
|
|
request req;
|
|
req.push("SUBSCRIBE", "channel");
|
|
|
|
while (conn->will_reconnect()) {
|
|
|
|
// Reconnect to channels.
|
|
co_await conn->async_exec(req, ignore, net::deferred);
|
|
|
|
// Loop reading Redis pushs messages.
|
|
for (generic_response resp;;) {
|
|
error_code ec;
|
|
co_await conn->async_receive(resp, net::redirect_error(net::use_awaitable, ec));
|
|
if (ec)
|
|
break; // Connection lost, break so we can reconnect to channels.
|
|
std::cout
|
|
<< resp.value().at(1).value
|
|
<< " " << resp.value().at(2).value
|
|
<< " " << resp.value().at(3).value
|
|
<< std::endl;
|
|
resp.value().clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
auto co_main(config cfg) -> net::awaitable<void>
|
|
{
|
|
auto ex = co_await net::this_coro::executor;
|
|
auto conn = std::make_shared<connection>(ex);
|
|
net::co_spawn(ex, receiver(conn), net::detached);
|
|
conn->async_run(cfg, {}, net::consign(net::detached, conn));
|
|
|
|
signal_set sig_set(ex, SIGINT, SIGTERM);
|
|
co_await sig_set.async_wait();
|
|
|
|
conn->cancel();
|
|
}
|
|
|
|
#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)
|