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113 lines
3.6 KiB
C++
113 lines
3.6 KiB
C++
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// This file is originally from Trantor - Connector.h
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// Copyright (c) 2016-2021, Tao An. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of Tao An nor the names of other contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#pragma once
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#include "core/loops/event_loop.h"
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#include "core/net/inet_address.h"
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#include <atomic>
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#include <memory>
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// inherit from socket?
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// Could be called ClientSocket
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// New connection callback -> make it a virtual func?
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class Connector : public std::enable_shared_from_this<Connector> {
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protected:
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Connector(const Connector &) = delete;
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Connector &operator=(const Connector &) = delete;
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// some uncopyable classes maybe support move constructor....
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Connector(Connector &&) noexcept(true) = default;
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Connector &operator=(Connector &&) noexcept(true) = default;
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public:
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using NewConnectionCallback = std::function<void(int sockfd)>;
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using ConnectionErrorCallback = std::function<void()>;
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Connector(EventLoop *loop, const InetAddress &addr, bool retry = true);
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Connector(EventLoop *loop, InetAddress &&addr, bool retry = true);
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void setNewConnectionCallback(const NewConnectionCallback &cb) {
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newConnectionCallback_ = cb;
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}
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void setNewConnectionCallback(NewConnectionCallback &&cb) {
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newConnectionCallback_ = std::move(cb);
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}
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void setErrorCallback(const ConnectionErrorCallback &cb) {
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errorCallback_ = cb;
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}
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void setErrorCallback(ConnectionErrorCallback &&cb) {
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errorCallback_ = std::move(cb);
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}
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const InetAddress &serverAddress() const {
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return serverAddr_;
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}
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void start();
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void restart();
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void stop();
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private:
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NewConnectionCallback newConnectionCallback_;
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ConnectionErrorCallback errorCallback_;
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enum class Status {
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Disconnected,
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Connecting,
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Connected
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};
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static constexpr int kMaxRetryDelayMs = 30 * 1000;
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static constexpr int kInitRetryDelayMs = 500;
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std::shared_ptr<Channel> channelPtr_;
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EventLoop *loop_;
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InetAddress serverAddr_;
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std::atomic_bool connect_{ false };
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std::atomic<Status> status_{ Status::Disconnected };
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int retryInterval_{ kInitRetryDelayMs };
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int maxRetryInterval_{ kMaxRetryDelayMs };
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bool retry_;
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void startInLoop();
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void connect();
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void connecting(int sockfd);
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int removeAndResetChannel();
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void handleWrite();
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void handleError();
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void retry(int sockfd);
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};
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