11-EasyNetQ之多态发布和订阅
你能够订阅一个接口,然后发布基于这个接口的实现。
让我们看下一个示例。我有一个接口IAnimal和两个实现Cat和Dog:
public interface IAnimal
{
string Name { get; set; }
}
public class Cat : IAnimal
{
public string Name { get; set; }
public string Meow { get; set; }
}
public class Dog : IAnimal
{
public string Name { get; set; }
public string Bark { get; set; }
}
我能够订阅IAnimal接口,并接收Cat和Dog这个两个类:
bus.Subscribe<IAnimal>("polymorphic_test",
@interface =>
{
var cat = @interface as Cat;
var dog = @interface as Dog;
if (cat != null)
{
Console.WriteLine("Name = {0}", cat.Name);
Console.WriteLine("Meow = {0}", cat.Meow);
}
else if (dog != null)
{
Console.WriteLine("Name = {0}", dog.Name);
Console.WriteLine("Bark = {0}", dog.Bark);
}
else
{
Console.WriteLine("message was not a
dog or a cat");
}
}
);
让我们发布Cat和Dog:
var cat = new Cat
{
Name = "Gobbolino",
Meow = "Purr"
};
var dog = new Dog
{
Name = "Rover",
Bark = "Woof"
};
bus.Publish<IAnimal>(cat);
bus.Publish<IAnimal>(dog);
注意:必须显示的指定发布了IAnimal接口。EasyNetQ在发布和订阅方法中指定了泛型去发布和订阅。
英文地址:https://github.com/EasyNetQ/EasyNetQ/wiki/Polymorphic-Publish-and-Subscribe
本文地址:http://www.cnblogs.com/HuangLiang/p/EasyNetQ_Polymorphic_Publish_and_Subscribe.html
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