118 lines
4.3 KiB
C++
118 lines
4.3 KiB
C++
/*
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* This file is open source software, licensed to you under the terms
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* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
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* distributed with this work for additional information regarding copyright
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* ownership. You may not use this file except in compliance with the License.
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*
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/*
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* Copyright (C) 2020 ScyllaDB.
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*/
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#include <iostream>
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#include <seastar/core/seastar.hh>
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#include <seastar/core/reactor.hh>
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#include <seastar/core/future-util.hh>
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#include <seastar/net/api.hh>
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seastar::future<> service_loop() {
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return seastar::do_with(seastar::listen(seastar::make_ipv4_address({1234})),
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[] (auto& listener) {
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return seastar::keep_doing([&listener] () {
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return listener.accept().then(
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[] (seastar::accept_result res) {
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std::cout << "Accepted connection from " << res.remote_address << "\n";
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});
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});
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});
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}
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const char* canned_response = "Seastar is the future!\n";
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seastar::future<> service_loop_2() {
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seastar::listen_options lo;
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lo.reuse_address = true;
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return seastar::do_with(seastar::listen(seastar::make_ipv4_address({1234}), lo),
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[] (auto& listener) {
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return seastar::keep_doing([&listener] () {
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return listener.accept().then(
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[] (seastar::accept_result res) {
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auto s = std::move(res.connection);
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auto out = s.output();
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return seastar::do_with(std::move(s), std::move(out),
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[] (auto& s, auto& out) {
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return out.write(canned_response).then([&out] {
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return out.close();
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});
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});
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});
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});
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});
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}
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seastar::future<> handle_connection_3(seastar::connected_socket s,
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seastar::socket_address a) {
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auto out = s.output();
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auto in = s.input();
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return do_with(std::move(s), std::move(out), std::move(in),
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[] (auto& s, auto& out, auto& in) {
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return seastar::repeat([&out, &in] {
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return in.read().then([&out] (auto buf) {
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if (buf) {
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return out.write(std::move(buf)).then([&out] {
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return out.flush();
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}).then([] {
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return seastar::stop_iteration::no;
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});
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} else {
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return seastar::make_ready_future<seastar::stop_iteration>(
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seastar::stop_iteration::yes);
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}
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});
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}).then([&out] {
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return out.close();
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});
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});
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}
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seastar::future<> service_loop_3() {
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seastar::listen_options lo;
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lo.reuse_address = true;
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return seastar::do_with(seastar::listen(seastar::make_ipv4_address({1234}), lo),
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[] (auto& listener) {
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return seastar::keep_doing([&listener] () {
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return listener.accept().then(
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[] (seastar::accept_result res) {
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// Note we ignore, not return, the future returned by
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// handle_connection(), so we do not wait for one
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// connection to be handled before accepting the next one.
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(void)handle_connection_3(std::move(res.connection), std::move(res.remote_address)).handle_exception(
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[] (std::exception_ptr ep) {
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fmt::print(stderr, "Could not handle connection: {}\n", ep);
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});
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});
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});
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});
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}
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#include <seastar/core/app-template.hh>
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int main(int ac, char** av) {
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seastar::app_template app;
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return app.run(ac, av, [] {
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std::cout << "This is the tutorial examples demo. It is not running anything but rather makes sure the tutorial examples compile" << std::endl;
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return seastar::make_ready_future<>();
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});
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}
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