文章目录
- 一.编写思路
- 二.代码实践
- 三.服务端模块关系总结
一.编写思路
成员变量:
- muduo 库中的 TCP 服务器
- EventLoop 对象:用于主线程循环监控连接事件
- 协议处理句柄
- 分发器:用于初始化协议处理器,便于把不同请求派发给不同的业务处理函数
- 连接管理句柄
- 虚拟机句柄
- 消费者管理句柄
- 线程池管理句柄
成员方法:
向外提供的只有 2 个方法:- start:启动服务
- 构造函数:
- 完成各项成员的初始化,
- 注册 TCP 服务器的两个回调函数:
OnMessage:从接收缓冲区把数据读到用户缓冲区后的回调函数
OnConnection:Tcp 连接建立或断开时的回调函数- 给分发器注册业务处理函数(私有成员方法,共 12 个)
信道打开与与关闭;交换机,队列,绑定添加与删除,订阅与取消订阅,发布与确认消息
私有成员(业务处理函数):
如果是创建或关闭信道,直接用连接管理句柄新增或删除信道,然后构建响应返回
如果是其他请求,先用连接管理句柄找到信道(请求中携带了信道 id),再使用信道提供的服务
二.代码实践
BrokerServer.hpp:
#pragma once
#include "muduo/protobuf/codec.h"
#include "muduo/protobuf/dispatcher.h"
#include "muduo/base/Logging.h"
#include "muduo/base/Mutex.h"
#include "muduo/net/EventLoop.h"
#include "muduo/net/TcpServer.h"
#include "VirtualHost.hpp"
#include "Connection.hpp"
#include "Consumer.hpp"
#include <functional>
#include <stdio.h>
#include <unistd.h>
namespace ns_server
{
using ConnectionManagerPtr = std::shared_ptr<ns_connection::ConnectionManager>;
using VirtualHostPtr = std::shared_ptr<ns_data::VirtualHost>;
using ConsumerManagerPtr = std::shared_ptr<ns_consumer::ConsumerManager>;
using ThreadPoolPtr = std::shared_ptr<ns_tp::ThreadPool>;
using ProtobufCodecPtr = std::shared_ptr<ProtobufCodec>;
/************
* 定义协议的结构化数据的智能指针(在分发器中注册时需要的格式)
* *************/
using OpenChannelRequestPtr = std::shared_ptr<ns_protocol::OpenChannelRequest>;
using CloseChannelRequestPtr = std::shared_ptr<ns_protocol::CloseChannelRequest>;
using DeclareExchangeRequestPtr = std::shared_ptr<ns_protocol::DeclareExchangeRequest>;
using DeleteExchangeRequestPtr = std::shared_ptr<ns_protocol::DeleteExchangeRequest>;
using DeclareMsgQueueRequestPtr = std::shared_ptr<ns_protocol::DeclareMsgQueueRequest>;
using DeleteMsgQueueRequestPtr = std::shared_ptr<ns_protocol::DeleteMsgQueueRequest>;
using BindRequestPtr = std::shared_ptr<ns_protocol::BindRequest>;
using UnbindRequestPtr = std::shared_ptr<ns_protocol::UnbindRequest>;
using PublishMessageRequestPtr = std::shared_ptr<ns_protocol::PublishMessageRequest>;
using SubscribeQueueRequestPtr = std::shared_ptr<ns_protocol::SubscribeQueueRequest>;
using CancelSubscribeRequestPtr = std::shared_ptr<ns_protocol::CancelSubscribeRequest>;
using AckRequestPtr = std::shared_ptr<ns_protocol::AckRequest>;
class BrokerServer
{
public:
private:
muduo::net::EventLoop _baseLoop;
muduo::net::TcpServer _server;
ProtobufDispatcher _dispatcher;
ProtobufCodecPtr _codecPtr;
VirtualHostPtr _vhPtr;
ConsumerManagerPtr _consumerManagerPtr;
ConnectionManagerPtr _connManagerPtr;
ThreadPoolPtr _threadPoolPtr;
public:
BrokerServer(int serverPort, const std::string &dbName, const std::string &msgDir)
: _baseLoop(),
_server(&_baseLoop, muduo::net::InetAddress("0.0.0.0", serverPort), "TcpServer", muduo::net::TcpServer::kReusePort),
_dispatcher(std::bind(&BrokerServer::onUnknownMessage, this, std::placeholders::_1,
std::placeholders::_2, std::placeholders::_3))
{
// 初始化成员
_codecPtr = std::make_shared<ProtobufCodec>(std::bind(&ProtobufDispatcher::onProtobufMessage,
&_dispatcher, std::placeholders::_1,
std::placeholders::_2, std::placeholders::_3));
_vhPtr = std::make_shared<ns_data::VirtualHost>(dbName, msgDir);
_threadPoolPtr = std::make_shared<ns_tp::ThreadPool>();
_threadPoolPtr->start();
std::vector<std::string> qnames;
_vhPtr->getAllQueueName(&qnames);
_consumerManagerPtr = std::make_shared<ns_consumer::ConsumerManager>(qnames);
_connManagerPtr = std::make_shared<ns_connection::ConnectionManager>();
// 给_server注册两个回调函数
_server.setConnectionCallback(std::bind(&BrokerServer::onConnection, this, std::placeholders::_1));
_server.setMessageCallback(std::bind(&ProtobufCodec::onMessage, _codecPtr.get(), std::placeholders::_1,
std::placeholders::_2, std::placeholders::_3));
// 给分发器注册业务处理函数
_dispatcher.registerMessageCallback<ns_protocol::OpenChannelRequest>(std::bind(&BrokerServer::onOpenChannel,
this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
_dispatcher.registerMessageCallback<ns_protocol::CloseChannelRequest>(std::bind(&BrokerServer::onCloseChannel,
this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
_dispatcher.registerMessageCallback<ns_protocol::DeclareExchangeRequest>(std::bind(&BrokerServer::onDeclareExchange,
this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
_dispatcher.registerMessageCallback<ns_protocol::DeleteExchangeRequest>(std::bind(&BrokerServer::onDeleteExchange,
this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
_dispatcher.registerMessageCallback<ns_protocol::DeclareMsgQueueRequest>(std::bind(&BrokerServer::onDeclareMsgQueue,
this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
_dispatcher.registerMessageCallback<ns_protocol::DeleteMsgQueueRequest>(std::bind(&BrokerServer::onDeleteMsgQueue,
this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
_dispatcher.registerMessageCallback<ns_protocol::BindRequest>(std::bind(&BrokerServer::onBind,
this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
_dispatcher.registerMessageCallback<ns_protocol::UnbindRequest>(std::bind(&BrokerServer::onUnbind,
this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
_dispatcher.registerMessageCallback<ns_protocol::SubscribeQueueRequest>(std::bind(&BrokerServer::onSubScribe,
this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
_dispatcher.registerMessageCallback<ns_protocol::CancelSubscribeRequest>(std::bind(&BrokerServer::onCancelSubScribe,
this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
_dispatcher.registerMessageCallback<ns_protocol::PublishMessageRequest>(std::bind(&BrokerServer::onPublishMessage,
this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
_dispatcher.registerMessageCallback<ns_protocol::AckRequest>(std::bind(&BrokerServer::onAck,
this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
}
void start()
{
// 开启监听状态
_server.start();
// 开始循环监控事件
_baseLoop.loop();
}
private:
// 给TcpServer设置的回调函数
void onConnection(const muduo::net::TcpConnectionPtr &connPtr)
{
if (connPtr->connected())
{
_connManagerPtr->newConnection(connPtr, _codecPtr, _vhPtr, _consumerManagerPtr, _threadPoolPtr);
}
else
{
_connManagerPtr->deleteConnection(connPtr);
}
}
// 业务处理函数
void onUnknownMessage(const muduo::net::TcpConnectionPtr &connPtr, MessagePtr msgPtr, muduo::Timestamp time)
{
cout << "未知消息" << endl;
connPtr->shutdown();
}
/************
* 信道创建与删除
* ***************/
void onOpenChannel(const muduo::net::TcpConnectionPtr &connPtr, const OpenChannelRequestPtr &reqPtr, muduo::Timestamp time)
{
auto myConnPtr = _connManagerPtr->getConnection(connPtr);
if (myConnPtr == nullptr)
{
LOG(WARNING) << "打开信道时, 未找到Connection" << endl;
return;
}
myConnPtr->openChannel(*reqPtr);
LOG(DEBUG) << "create new channel, channelId: " << reqPtr->channel_id() << endl;
}
void onCloseChannel(const muduo::net::TcpConnectionPtr &connPtr, const CloseChannelRequestPtr &reqPtr, muduo::Timestamp time)
{
auto myConnPtr = _connManagerPtr->getConnection(connPtr);
if (myConnPtr == nullptr)
{
LOG(WARNING) << "关闭信道时, 未找到Connection" << endl;
return;
}
myConnPtr->closeChannel(*reqPtr);
LOG(DEBUG) << "close channel, channelId: " << reqPtr->channel_id() << endl;
}
/*********
* 交换机声明与删除
* ********/
void onDeclareExchange(const muduo::net::TcpConnectionPtr &connPtr, const DeclareExchangeRequestPtr &reqPtr, muduo::Timestamp time)
{
auto myConnPtr = _connManagerPtr->getConnection(connPtr);
if (myConnPtr == nullptr)
{
LOG(WARNING) << "声明交换机时, 未找到Connection" << endl;
return;
}
auto channelPtr = myConnPtr->getChannel(reqPtr->channel_id());
if (channelPtr == nullptr)
{
LOG(WARNING) << "没有找到信道" << endl;
return;
}
channelPtr->declareExchange(*reqPtr);
LOG(DEBUG) << "声明交换机, exchangeName: " << reqPtr->exchange_name() << endl;
}
void onDeleteExchange(const muduo::net::TcpConnectionPtr &connPtr, const DeleteExchangeRequestPtr &reqPtr, muduo::Timestamp time)
{
auto myConnPtr = _connManagerPtr->getConnection(connPtr);
if (myConnPtr == nullptr)
{
LOG(WARNING) << "删除交换机时, 未找到Connection" << endl;
return;
}
auto channelPtr = myConnPtr->getChannel(reqPtr->channel_id());
if (channelPtr == nullptr)
{
LOG(WARNING) << "没有找到信道" << endl;
return;
}
channelPtr->deleteExchange(*reqPtr);
LOG(DEBUG) << "删除信道, exchangeName: " << reqPtr->exchange_name() << endl;
}
/************
* 队列声明与删除
* ***************/
void onDeclareMsgQueue(const muduo::net::TcpConnectionPtr &connPtr, const DeclareMsgQueueRequestPtr &reqPtr, muduo::Timestamp time)
{
auto myConnPtr = _connManagerPtr->getConnection(connPtr);
if (myConnPtr == nullptr)
{
LOG(WARNING) << "声明队列时, 未找到Connection" << endl;
return;
}
auto channelPtr = myConnPtr->getChannel(reqPtr->channel_id());
if (channelPtr == nullptr)
{
LOG(WARNING) << "没有找到信道" << endl;
return;
}
channelPtr->declareMsgQueue(*reqPtr);
LOG(DEBUG) << "声明队列, queueName: " << reqPtr->queue_name() << endl;
}
void onDeleteMsgQueue(const muduo::net::TcpConnectionPtr &connPtr, const DeleteMsgQueueRequestPtr &reqPtr, muduo::Timestamp time)
{
auto myConnPtr = _connManagerPtr->getConnection(connPtr);
if (myConnPtr == nullptr)
{
LOG(WARNING) << "删除队列时, 未找到Connection" << endl;
return;
}
auto channelPtr = myConnPtr->getChannel(reqPtr->channel_id());
if (channelPtr == nullptr)
{
LOG(WARNING) << "没有找到信道" << endl;
return;
}
channelPtr->deleteMsgQueue(*reqPtr);
LOG(DEBUG) << "删除队列, queueName: " << reqPtr->queue_name() << endl;
}
/**********
* 绑定与解绑
* ***********/
void onBind(const muduo::net::TcpConnectionPtr &connPtr, const BindRequestPtr &reqPtr, muduo::Timestamp time)
{
auto myConnPtr = _connManagerPtr->getConnection(connPtr);
if (myConnPtr == nullptr)
{
LOG(WARNING) << "添加绑定时, 未找到Connection" << endl;
return;
}
auto channelPtr = myConnPtr->getChannel(reqPtr->channel_id());
if (channelPtr == nullptr)
{
LOG(WARNING) << "没有找到信道" << endl;
return;
}
channelPtr->bind(*reqPtr);
LOG(DEBUG) << "绑定: " << reqPtr->ename() << "->" << reqPtr->qname() << ": " << reqPtr->binding_key() << endl;
}
void onUnbind(const muduo::net::TcpConnectionPtr &connPtr, const UnbindRequestPtr &reqPtr, muduo::Timestamp time)
{
auto myConnPtr = _connManagerPtr->getConnection(connPtr);
if (myConnPtr == nullptr)
{
LOG(WARNING) << "删除绑定时, 未找到Connection" << endl;
return;
}
auto channelPtr = myConnPtr->getChannel(reqPtr->channel_id());
if (channelPtr == nullptr)
{
LOG(WARNING) << "没有找到信道" << endl;
return;
}
channelPtr->unbind(*reqPtr);
LOG(DEBUG) << "解绑: " << reqPtr->ename() << "->" << reqPtr->qname() << endl;
}
/*************
* 订阅与取消订阅
* ************/
void onSubScribe(const muduo::net::TcpConnectionPtr &connPtr, const SubscribeQueueRequestPtr &reqPtr, muduo::Timestamp time)
{
auto myConnPtr = _connManagerPtr->getConnection(connPtr);
if (myConnPtr == nullptr)
{
LOG(WARNING) << "订阅队列时, 未找到Connection" << endl;
return;
}
auto channelPtr = myConnPtr->getChannel(reqPtr->channel_id());
if (channelPtr == nullptr)
{
LOG(WARNING) << "没有找到信道" << endl;
return;
}
channelPtr->subscribeQueue(*reqPtr);
LOG(DEBUG) << "订阅队列" << ", qname: " << reqPtr->qname() << endl;
}
void onCancelSubScribe(const muduo::net::TcpConnectionPtr &connPtr, const CancelSubscribeRequestPtr &reqPtr, muduo::Timestamp time)
{
auto myConnPtr = _connManagerPtr->getConnection(connPtr);
if (myConnPtr == nullptr)
{
LOG(WARNING) << "取消订阅队列时, 未找到Connection" << endl;
return;
}
auto channelPtr = myConnPtr->getChannel(reqPtr->channel_id());
if (channelPtr == nullptr)
{
LOG(WARNING) << "没有找到信道" << endl;
return;
}
channelPtr->cancelSubscribe(*reqPtr);
LOG(DEBUG) << "取消订阅队列" << ", qname: " << reqPtr->qname() << endl;
}
/********
* 发布与应答
* **************/
void onPublishMessage(const muduo::net::TcpConnectionPtr &connPtr, const PublishMessageRequestPtr &reqPtr, muduo::Timestamp time)
{
auto myConnPtr = _connManagerPtr->getConnection(connPtr);
if (myConnPtr == nullptr)
{
LOG(WARNING) << "发布消息时, 未找到Connection" << endl;
return;
}
auto channelPtr = myConnPtr->getChannel(reqPtr->channel_id());
if (channelPtr == nullptr)
{
LOG(WARNING) << "没有找到信道" << endl;
return;
}
channelPtr->publishMessage(*reqPtr);
LOG(DEBUG) << "publish message: " << reqPtr->msg().saved_info().body() << endl;
}
void onAck(const muduo::net::TcpConnectionPtr &connPtr, const AckRequestPtr &reqPtr, muduo::Timestamp time)
{
auto myConnPtr = _connManagerPtr->getConnection(connPtr);
if (myConnPtr == nullptr)
{
LOG(WARNING) << "确认消息时, 未找到Connection" << endl;
return;
}
auto channelPtr = myConnPtr->getChannel(reqPtr->channel_id());
if (channelPtr == nullptr)
{
LOG(WARNING) << "没有找到信道" << endl;
return;
}
channelPtr->ackMessage(*reqPtr);
LOG(DEBUG) << "应答消息, msgId: " << reqPtr->msg_id() << endl;
}
void sendCommonResponse(const muduo::net::TcpConnectionPtr &connPtr, const std::string &channelId,
const std::string &responseId, bool ok)
{
ns_protocol::CommomResponse resp;
resp.set_channel_id(channelId);
resp.set_response_id(responseId);
resp.set_ok(ok);
_codecPtr->send(connPtr, resp);
}
};
}