建网站卖多少钱,湖北专业的网瘾学校收费标准,国家企业公司网,免备案空间什么意思1、中介者模式的提出
在软件组件开发过程中#xff0c;如果存在多个对象#xff0c;且这些对象之间存在的相互交互的情况不是一一对应的情况#xff0c;这种功能组件间的对象引用关系比较复杂#xff0c;耦合度较高。如果有一些新的需求变化#xff0c;则不易扩展。中介者…1、中介者模式的提出
在软件组件开发过程中如果存在多个对象且这些对象之间存在的相互交互的情况不是一一对应的情况这种功能组件间的对象引用关系比较复杂耦合度较高。如果有一些新的需求变化则不易扩展。中介者模式可以解决这种问题。中介者模式使用一个“中介对象”去管理对象间的关联关系这个中介对象里面定义了对象间的数据统一交互接口解耦对象间的直接交互依赖从而提高代码的扩展性。
2、需求描述
有2个线上人员这两个线上人员可以相互发送和接收对象的消息。设计一个线上人员数据交互的代码且代码架构便于扩展。
3、中介者模式的代码实现
1UML图如下 2代码实现如下
#include iostream
#include vectorclass Mediator;
class OnlinerPeople
{
protected:Mediator* mediator;
public:virtual void sendMsg(std::string msg)0;virtual void receiveMsg(std::string msg)0;virtual ~OnlinerPeople(){};
};class Mediator
{
protected:std::vectorOnlinerPeople*vecOnlinePeoples;
public:virtual void sendMessage(std::string msg,OnlinerPeople* pepole)0;virtual void addOnliners(OnlinerPeople* people)0;virtual ~Mediator(){};
};class ConcreteMediator:public Mediator
{
public:void addOnliners(OnlinerPeople* people)override{vecOnlinePeoples.emplace_back(people);};virtual void sendMessage(std::string msg, OnlinerPeople *pepole) override{for(auto it vecOnlinePeoples.begin();it ! vecOnlinePeoples.end(); it){if( *it ! pepole){(*it)-receiveMsg(msg);}}}
};class OnlinerPeople1:public OnlinerPeople
{
public:void Init(Mediator* mediator){this-mediator mediator;}virtual void sendMsg(std::string msg) override{std::cout OnlinerPeople1 sendMsg: std::endl;mediator-sendMessage(msg,this);}virtual void receiveMsg(std::string msg) override{std::cout OnlinerPeople1 receive msg: msg std::endl;}
};class OnlinerPeople2:public OnlinerPeople
{
public:void Init(Mediator* mediator){this-mediator mediator;}virtual void sendMsg(std::string msg) override{std::cout OnlinerPeople2 sendMsg: std::endl;mediator-sendMessage(msg,this);}virtual void receiveMsg(std::string msg) override{std::cout OnlinerPeople2 receive msg: msg std::endl;}
};
class Client
{
private:Mediator* mediator{nullptr};OnlinerPeople1 people1;OnlinerPeople2 people2;
public:Client(Mediator* p){mediator p;people1.Init(mediator);people2.Init(mediator);};void DoWork(){mediator-addOnliners(people1);mediator-addOnliners(people2);people1.sendMsg(hello people2);people2.sendMsg(hello people1);};
};int main()
{Mediator* mediator new ConcreteMediator();Client obj(mediator);obj.DoWork();delete mediator;mediator nullptr;return 0;
}程序运行结果如下
