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//实现语音识别子服务
#include <brpc/server.h>
#include <butil/logging.h>
#include "etcd.hpp" // 服务注册模块封装
#include "logger.hpp" // 日志模块封装
#include "rabbitmq.hpp"
#include "channel.hpp"
#include "utils.hpp"
#include "mysql_chat_session_member.hpp"
#include "base.pb.h" // protobuf框架代码
#include "user.pb.h" // protobuf框架代码
#include "transmite.pb.h" // protobuf框架代码
namespace bite_im{
class TransmiteServiceImpl : public bite_im::MsgTransmitService {
public:
TransmiteServiceImpl(const std::string &user_service_name,
const ServiceManager::ptr &channels,
const std::shared_ptr<odb::core::database> &mysql_client,
const std::string &exchange_name,
const std::string &routing_key,
const MQClient::ptr &mq_client):
_user_service_name(user_service_name),
_mm_channels(channels),
_mysql_session_member_table(std::make_shared<ChatSessionMemeberTable>(mysql_client)),
_exchange_name(exchange_name),
_routing_key(routing_key),
_mq_client(mq_client){}
~TransmiteServiceImpl(){}
void GetTransmitTarget(google::protobuf::RpcController* controller,
const ::bite_im::NewMessageReq* request,
::bite_im::GetTransmitTargetRsp* response,
::google::protobuf::Closure* done) override {
brpc::ClosureGuard rpc_guard(done);
auto err_response = [this, response](const std::string &rid,
const std::string &errmsg) -> void {
response->set_request_id(rid);
response->set_success(false);
response->set_errmsg(errmsg);
return;
};
//从请求中获取关键信息：用户ID，所属会话ID，消息内容
std::string rid = request->request_id();
std::string uid = request->user_id();
std::string chat_ssid = request->chat_session_id();
const MessageContent &content = request->message();
// 进行消息组织：发送者-用户子服务获取信息，所属会话，消息内容，产生时间，消息ID
auto channel = _mm_channels->choose(_user_service_name);
if (!channel) {
LOG_ERROR("{}-{} 没有可供访问的用户子服务节点！", rid, _user_service_name);
return err_response(rid, "没有可供访问的用户子服务节点！");
}
UserService_Stub stub(channel.get());
GetUserInfoReq req;
GetUserInfoRsp rsp;
req.set_request_id(rid);
req.set_user_id(uid);
brpc::Controller cntl;
stub.GetUserInfo(&cntl, &req, &rsp, nullptr);
if (cntl.Failed() == true || rsp.success() == false) {
LOG_ERROR("{} - 用户子服务调用失败：{}！", request->request_id(), cntl.ErrorText());
return err_response(request->request_id(), "用户子服务调用失败!");
}
MessageInfo message;
message.set_message_id(uuid());
message.set_chat_session_id(chat_ssid);
message.set_timestamp(time(nullptr));
message.mutable_sender()->CopyFrom(rsp.user_info());
message.mutable_message()->CopyFrom(content);
// 获取消息转发客户端用户列表
auto target_list = _mysql_session_member_table->members(chat_ssid);
// 将封装完毕的消息，发布到消息队列，待消息存储子服务进行消息持久化
bool ret = _mq_client->publish(_exchange_name, message.SerializeAsString(), _routing_key);
if (ret == false) {
LOG_ERROR("{} - 持久化消息发布失败：{}！", request->request_id(), cntl.ErrorText());
return err_response(request->request_id(), "持久化消息发布失败：!");
}
//组织响应
response->set_request_id(rid);
response->set_success(true);
response->mutable_message()->CopyFrom(message);
for (const auto &id : target_list) {
response->add_target_id_list(id);
}
}
private:
//用户子服务调用相关信息
std::string _user_service_name;
ServiceManager::ptr _mm_channels;
//聊天会话成员表的操作句柄
ChatSessionMemeberTable::ptr _mysql_session_member_table;
//消息队列客户端句柄
std::string _exchange_name;
std::string _routing_key;
MQClient::ptr _mq_client;
};
class TransmiteServer {
public:
using ptr = std::shared_ptr<TransmiteServer>;
TransmiteServer(
const std::shared_ptr<odb::core::database> &mysql_client,
const Discovery::ptr discovery_client,
const Registry::ptr &registry_client,
const std::shared_ptr<brpc::Server> &server):
_service_discoverer(discovery_client),
_registry_client(registry_client),
_mysql_client(mysql_client),
_rpc_server(server){}
~TransmiteServer(){}
//搭建RPC服务器，并启动服务器
void start() {
_rpc_server->RunUntilAskedToQuit();
}
private:
Discovery::ptr _service_discoverer; //服务发现客户端
Registry::ptr _registry_client; // 服务注册客户端
std::shared_ptr<odb::core::database> _mysql_client; //mysql数据库客户端
std::shared_ptr<brpc::Server> _rpc_server;
};
class TransmiteServerBuilder {
public:
//构造mysql客户端对象
void make_mysql_object(
const std::string &user,
const std::string &pswd,
const std::string &host,
const std::string &db,
const std::string &cset,
int port,
int conn_pool_count) {
_mysql_client = ODBFactory::create(user, pswd, host, db, cset, port, conn_pool_count);
}
//用于构造服务发现客户端&信道管理对象
void make_discovery_object(const std::string &reg_host,
const std::string &base_service_name,
const std::string &user_service_name) {
_user_service_name = user_service_name;
_mm_channels = std::make_shared<ServiceManager>();
_mm_channels->declared(user_service_name);
LOG_DEBUG("设置用户子服务为需添加管理的子服务：{}", user_service_name);
auto put_cb = std::bind(&ServiceManager::onServiceOnline, _mm_channels.get(), std::placeholders::_1, std::placeholders::_2);
auto del_cb = std::bind(&ServiceManager::onServiceOffline, _mm_channels.get(), std::placeholders::_1, std::placeholders::_2);
_service_discoverer = std::make_shared<Discovery>(reg_host, base_service_name, put_cb, del_cb);
}
//用于构造服务注册客户端对象
void make_registry_object(const std::string &reg_host,
const std::string &service_name,
const std::string &access_host) {
_registry_client = std::make_shared<Registry>(reg_host);
_registry_client->registry(service_name, access_host);
}
//用于构造rabbitmq客户端对象
void make_mq_object(const std::string &user,
const std::string &passwd,
const std::string &host,
const std::string &exchange_name,
const std::string &queue_name,
const std::string &binding_key) {
_routing_key = binding_key;
_exchange_name = exchange_name;
_mq_client = std::make_shared<MQClient>(user, passwd, host);
_mq_client->declareComponents(exchange_name, queue_name, binding_key);
}
//构造RPC服务器对象
void make_rpc_server(uint16_t port, int32_t timeout, uint8_t num_threads) {
if (!_mq_client) {
LOG_ERROR("还未初始化消息队列客户端模块！");
abort();
}
if (!_mm_channels) {
LOG_ERROR("还未初始化信道管理模块！");
abort();
}
if (!_mysql_client) {
LOG_ERROR("还未初始化Mysql数据库模块！");
abort();
}
_rpc_server = std::make_shared<brpc::Server>();
TransmiteServiceImpl *transmite_service = new TransmiteServiceImpl(
_user_service_name, _mm_channels, _mysql_client, _exchange_name, _routing_key, _mq_client);
int ret = _rpc_server->AddService(transmite_service,
brpc::ServiceOwnership::SERVER_OWNS_SERVICE);
if (ret == -1) {
LOG_ERROR("添加Rpc服务失败！");
abort();
}
brpc::ServerOptions options;
options.idle_timeout_sec = timeout;
options.num_threads = num_threads;
ret = _rpc_server->Start(port, &options);
if (ret == -1) {
LOG_ERROR("服务启动失败！");
abort();
}
}
TransmiteServer::ptr build() {
if (!_service_discoverer) {
LOG_ERROR("还未初始化服务发现模块！");
abort();
}
if (!_registry_client) {
LOG_ERROR("还未初始化服务注册模块！");
abort();
}
if (!_rpc_server) {
LOG_ERROR("还未初始化RPC服务器模块！");
abort();
}
TransmiteServer::ptr server = std::make_shared<TransmiteServer>(
_mysql_client, _service_discoverer, _registry_client, _rpc_server);
return server;
}
private:
std::string _user_service_name;
ServiceManager::ptr _mm_channels;
Discovery::ptr _service_discoverer;
std::string _routing_key;
std::string _exchange_name;
MQClient::ptr _mq_client;
Registry::ptr _registry_client; // 服务注册客户端
std::shared_ptr<odb::core::database> _mysql_client; //mysql数据库客户端
std::shared_ptr<brpc::Server> _rpc_server;
};
}