故事设定：房东告诉中介要出租房子。中介发布租房广告。租房者看到出租信息，告诉中介我要租这个房子。中介告诉房东有人要租房子。 租房结束。
说明：整个租房过程中，房东和租房者不直接联系的，各项活动都是通过中介进行。个人感觉：在一般的逻辑中，增加了中介者，反而会让类看起来复杂。在实际的项目中，可能各个交互对象根本无法抽离出一个抽象类或者行为接口，所以不要为了抽象而去抽象。
using System;
namespace WCF_Binding
{
class MediatorPattern
{
public void MainTest()
{
Mediator _mediator = new Mediator();
HouseOwn _houseown = new HouseOwn();
_houseown._mediator = _mediator;
_mediator.houseown = _houseown;
IRenter renter = new RichRenter();
renter.mediator = _mediator;
_mediator.renter = renter;
_houseown.SendMessage();
}
}
//中介发布租房信息，筛选客户
public interface IMediator
{
void SendNotice(string command);
void ReplyMessage(string reply);
}
public class Mediator : IMediator
{
static string _command = string.Empty;
public HouseOwn houseown { get; set; }
public IRenter renter { get; set; }
public void SendNotice(string command)
{
_command = "中介发布租房通知--》有豪华房子出租";
Console.WriteLine(_command);
//找到潜在客户
renter.SendMessage(_command, this);
}
public void ReplyMessage(string reply)
{
//dosomething:筛选客户，带客户看房子，客户满意后通知房主
Console.WriteLine("中介通知房东有人要租这个房子");
houseown.GetReply();
Console.WriteLine("双方签订合同，租房结束");
}
}
public interface IRenter
{
Mediator mediator { get; set; }
void SendMessage(string notice, Mediator mediator);
}
//房主向中介发布租房信息
public class HouseOwn
{
public Mediator _mediator { get; set; }
private string Command
{
get { return "房东要出租豪华房子--》"; }//什么样的房子，房租多少钱，要求房客什么类型的
}
public void SendMessage()
{
Console.WriteLine(Command);
_mediator.SendNotice(this.Command);
}
public void GetReply()
{
Console.WriteLine("房东知道房子有人租了");
}
}
//高富帅承租人得到通知
public class RichRenter:IRenter
{
Mediator _mediator;
public Mediator mediator { get { return _mediator; } set { _mediator = value; } }
public void SendMessage(string notice, Mediator mediator)
{
_mediator = mediator;
Console.WriteLine("Renter 得到这个通告");
DoSomething();
}
private void DoSomething()
{
Console.WriteLine("Renter--》告诉中介-我有的是钱，要租下这个房子");
_mediator.ReplyMessage("Renter--》告诉中介-我要租下这个房子");
}
}
public class PoorRenter : IRenter
{
Mediator _mediator;
public Mediator mediator { get { return _mediator; } set { _mediator = value; } }
public void SendMessage(string notice, Mediator mediator)
{
Console.WriteLine("Renter--》我没有钱，租不起价格高的房子");
}
}
}
结果如下：
