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78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
/* Copyright (c) 2019 - 2021 Marcelo Zimbres Silva (mzimbres at gmail dot com)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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#include <iostream>
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#include <chrono>
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#include <aedis/aedis.hpp>
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#include "utils.ipp"
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using namespace aedis;
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/* In previous examples we sent the command we were interested in and
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quit (closed) the connection. In this example we send a
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subscription to a channel and start reading for message
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indefinitely.
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Notice we store the id of the connection as seem by redis to be
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able to identify it.
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After starting the example you can send messages with the
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redis-client like this
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$ redis-cli -3
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127.0.0.1:6379> PUBLISH channel1 mmmm
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(integer) 3
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127.0.0.1:6379>
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The messages will then appear on the terminal you are running the
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example.
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*/
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net::awaitable<void> subscriber()
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{
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resp3::request req;
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req.push(command::hello, "3");
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req.push(command::subscribe, "channel1", "channel2");
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auto socket = co_await make_connection("127.0.0.1", "6379");
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co_await async_write(socket, req);
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std::string buffer;
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resp3::response resp;
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// Reads the response to the hello command.
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co_await async_read(socket, buffer, resp);
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// Saves the id of this connection.
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auto const id = resp.raw().at(8).data;
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// Reads the response to the subscribe command.
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co_await async_read(socket, buffer, resp);
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// Loops to receive server pushes.
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for (;;) {
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resp.clear();
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co_await async_read(socket, buffer, resp);
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std::cout
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<< "Subscriber " << id << ":\n"
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<< resp << std::endl;
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}
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}
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int main()
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{
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net::io_context ioc;
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co_spawn(ioc, subscriber(), net::detached);
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co_spawn(ioc, subscriber(), net::detached);
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co_spawn(ioc, subscriber(), net::detached);
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ioc.run();
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}
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/// \example basic4.cpp
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