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Files
redis/examples/async_all_hashes.cpp
Marcelo Zimbres 254215f7d4 Changes:
- Fixes some warning
- Adds version header.
- More improvements in the response type.
- Renames response_vector to response_array.
- Example on how to load all hashes key for a givent pattern from redis.
2020-12-23 20:05:08 +01:00

106 lines
2.6 KiB
C++

/* Copyright (c) 2019 - 2020 Marcelo Zimbres Silva (mzimbres at gmail dot com)
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
*/
#include <boost/asio.hpp>
#include <aedis/aedis.hpp>
namespace net = aedis::net;
using tcp = net::ip::tcp;
using tcp_socket = net::use_awaitable_t<>::as_default_on_t<tcp::socket>;
namespace this_coro = net::this_coro;
using namespace net;
using namespace aedis;
net::awaitable<void> create_hashes()
{
std::map<std::string, std::string> map1
{ {{"Name"}, {"Marcelo"}}
, {{"Education"}, {"Physics"}}
, {{"Job"}, {"Programmer"}}
};
std::map<std::string, std::string> map2
{ {{"Name"}, {"Lae"}}
, {{"Education"}, {"Engineer"}}
, {{"Job"}, {"Engineer"}}
};
std::map<std::string, std::string> map3
{ {{"Name"}, {"Louis"}}
, {{"Education"}, {"Nene"}}
, {{"Job"}, {"Nene"}}
};
resp::pipeline p;
p.flushall();
p.hset("user:map1", map1);
p.hset("user:map2", map2);
p.hset("user:map3", map3);
p.quit();
auto ex = co_await this_coro::executor;
tcp::resolver resv(ex);
auto const r = resv.resolve("127.0.0.1", "6379");
tcp_socket socket {ex};
co_await async_connect(socket, r);
co_await async_write(socket, buffer(p.payload));
std::string buffer;
resp::response res;
for (;;)
co_await resp::async_read(socket, buffer, res);
}
net::awaitable<void> read_hashes()
{
resp::pipeline p;
p.keys("user:*");
auto ex = co_await this_coro::executor;
tcp::resolver resv(ex);
auto const r = resv.resolve("127.0.0.1", "6379");
tcp_socket socket {ex};
co_await async_connect(socket, r);
co_await async_write(socket, net::buffer(p.payload));
std::string buffer;
resp::response_array<std::string> keys;
co_await resp::async_read(socket, buffer, keys);
print(keys.result);
// Generates the pipeline to retrieve all hashes.
resp::pipeline pv;
for (auto const& o : keys.result)
pv.hvals(o);
pv.quit();
co_await async_write(socket, net::buffer(pv.payload));
for (auto const& key : keys.result) {
resp::response_array<std::string> value;
co_await resp::async_read(socket, buffer, value);
print(value.result);
}
resp::response quit;
co_await resp::async_read(socket, buffer, quit);
}
int main()
{
io_context ioc {1};
co_spawn(ioc, create_hashes(), detached);
ioc.run();
ioc.restart();
co_spawn(ioc, read_hashes(), detached);
ioc.run();
}