代理模式

//main.cpp
#include <iostream>

#include "ServerInfoGetter.h"

#include <chrono>
#include <thread>
int main()
{
	ServerInfoGetter getter;
	ServerInfo info = getter.getInfo();

	while (1) {
		std::chrono::time_point<std::chrono::system_clock, std::chrono::milliseconds> tp = std::chrono::time_point_cast<std::chrono::milliseconds>(std::chrono::system_clock::now());
		long long currentTime = std::chrono::duration_cast<std::chrono::milliseconds>(tp.time_since_epoch()).count();

		if (currentTime - info.createTime >= 2000) {
			info = getter.getInfo();
		}
		else {
			// .....
		}

		std::this_thread::sleep_for(std::chrono::milliseconds(2000));
	}
	return 0;
}

//ServerInfoGetter.h
#include "ServerInfoGetter.h"


ServerInfo ServerInfoGetter::getInfo()
{
	ServerInfo info;
	info.cpu = 0.45;
	info.mem = 0.23;
	return info;
}

//
#pragma onServerInfoGetter.hce

#include "ServerInfo.h"

class ServerInfoGetter
{
public:
	ServerInfo getInfo();
};

//ServerInfo.h
#pragma once
class ServerInfo
{
public:
	ServerInfo();

	float cpu;
	float mem;

	long long createTime;
};

//ServerInfo.cpp
#include "ServerInfo.h"
#include <chrono>
#include <thread>

ServerInfo::ServerInfo()
{
	std::chrono::time_point<std::chrono::system_clock, std::chrono::milliseconds> tp = std::chrono::time_point_cast<std::chrono::milliseconds>(std::chrono::system_clock::now());
	createTime = std::chrono::duration_cast<std::chrono::milliseconds>(tp.time_since_epoch()).count();
}