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

巴特西

11-EasyNetQ之多态发布和订阅

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