有哪些動態代理模式和Mixin模式

這篇文章主要介紹“有哪些動態代理模式和Mixin模式”，在日常操作中，相信很多人在有哪些動態代理模式和Mixin模式問題上存在疑惑，小編查閱了各式資料，整理出簡單好用的操作方法，希望對大家解答”有哪些動態代理模式和Mixin模式”的疑惑有所幫助！接下來，請跟著小編一起來學習吧！

重量級的ORM和IOC產品離不開動態代理，作為開發人員，多數情況不用關注動態代理的內部實現機制，但是了解其一般的規律和模式還是有必要的，比如：雖然你開發期間采用了POCO，因為開啟了動態代理，運行期間則不是POCO。本文簡單描述了5種代理生成模式和1種Mixin模式，最后給出一個示例。

復制代碼 代碼如下:

public interface IPlayable
    {
        void Play();
    }

    public class Animal : IPlayable
    {
        public virtual void Play()
        {
            Console.WriteLine("Animal.Play");
        }
    }

    public class Dog : Animal
    {
        public override void Play()
        {
            Console.WriteLine("Dog.Play");
        }
    }

    public interface IRunable
    {
        void Run();
    }

    public class RunAbility : IRunable
    {
        public void Run()
        {
            Console.WriteLine("RunAbility.Run");
        }
    }

    public class AnimalInterceptor : IInterceptor
    {
        public void Intercept(IInvocation invocation)
        {
            Console.WriteLine("Before AnimalInterceptor.Intercept");
            if (invocation.InvocationTarget != null)
            {
                invocation.Proceed();
            }
            Console.WriteLine("After AnimalInterceptor.Intercept");
        }
    }

第一種：ClassProxy

復制代碼 代碼如下:

{
                Console.WriteLine("\n*************ClassProxy*************\n");
                var generator = new ProxyGenerator();
                var animal = generator.CreateClassProxy<Animal>(new AnimalInterceptor());
                animal.Play();

                Console.WriteLine(animal.GetType());
                Console.WriteLine(animal.GetType().BaseType);

                var compositeField = animal.GetType().GetField("__target");
                Console.WriteLine(compositeField);

                foreach (var interfaceType in animal.GetType().GetInterfaces())
                {
                    Console.WriteLine(interfaceType);
                }
            }

第二種：ClassProxyWithTarget

復制代碼 代碼如下:

{
                Console.WriteLine("\n*************ClassProxyWithTarget*************\n");
                var generator = new ProxyGenerator();
                var animal = generator.CreateClassProxyWithTarget<Animal>(new Dog(), new AnimalInterceptor());
                animal.Play();

                Console.WriteLine(animal.GetType());
                Console.WriteLine(animal.GetType().BaseType);

                var compositeField = animal.GetType().GetField("__target");
                Console.WriteLine(compositeField);

                foreach (var interfaceType in animal.GetType().GetInterfaces())
                {
                    Console.WriteLine(interfaceType);
                }
            }

第三種：InterfaceProxyWithoutTarget

復制代碼 代碼如下:

{
                Console.WriteLine("\n*************InterfaceProxyWithoutTarget*************\n");
                var generator = new ProxyGenerator();
                var animal = generator.CreateInterfaceProxyWithoutTarget<IPlayable>(new AnimalInterceptor());
                animal.Play();

                Console.WriteLine(animal.GetType());
                Console.WriteLine(animal.GetType().BaseType);

                var compositeField = animal.GetType().GetField("__target");
                Console.WriteLine(compositeField);

                foreach (var interfaceType in animal.GetType().GetInterfaces())
                {
                    Console.WriteLine(interfaceType);
                }
            }

第四種：InterfaceProxyWithTarget

復制代碼 代碼如下:

{
                Console.WriteLine("\n*************InterfaceProxyWithTarget*************\n");
                var generator = new ProxyGenerator();
                var animal = generator.CreateInterfaceProxyWithTarget<IPlayable>(new Dog(), new AnimalInterceptor());
                animal.Play();

                Console.WriteLine(animal.GetType());
                Console.WriteLine(animal.GetType().BaseType);

                var compositeField = animal.GetType().GetField("__target");
                Console.WriteLine(compositeField);

                foreach (var interfaceType in animal.GetType().GetInterfaces())
                {
                    Console.WriteLine(interfaceType);
                }
            }

第五種：InterfaceProxyWithTargetInterface

復制代碼 代碼如下:

{
                Console.WriteLine("\n*************InterfaceProxyWithTargetInterface*************\n");
                var generator = new ProxyGenerator();
                var animal = generator.CreateInterfaceProxyWithTargetInterface<IPlayable>(new Dog(), new AnimalInterceptor());
                animal.Play();

                Console.WriteLine(animal.GetType());
                Console.WriteLine(animal.GetType().BaseType);

                var compositeField = animal.GetType().GetField("__target");
                Console.WriteLine(compositeField);

                foreach (var interfaceType in animal.GetType().GetInterfaces())
                {
                    Console.WriteLine(interfaceType);
                }
            }

Mixin模式

復制代碼 代碼如下:

{
                Console.WriteLine("\n*************Mixin*************\n");
                var generator = new ProxyGenerator();
                var options = new ProxyGenerationOptions();
                options.AddMixinInstance(new RunAbility());
                var animal = generator.CreateClassProxy<Animal>(options, new AnimalInterceptor());
                animal.Play();
                (animal as IRunable).Run();

                Console.WriteLine(animal.GetType());
                Console.WriteLine(animal.GetType().BaseType);

                var compositeField = animal.GetType().GetField("__target");
                Console.WriteLine(compositeField);

                foreach (var field in animal.GetType().GetFields())
                {
                    if (field.Name.StartsWith("__mixin"))
                    {
                        Console.WriteLine(field);
                    }
                }

                foreach (var interfaceType in animal.GetType().GetInterfaces())
                {
                    Console.WriteLine(interfaceType);
                }
            }

到此，關于“有哪些動態代理模式和Mixin模式”的學習就結束了，希望能夠解決大家的疑惑。理論與實踐的搭配能更好的幫助大家學習，快去試試吧！若想繼續學習更多相關知識，請繼續關注億速云網站，小編會繼續努力為大家帶來更多實用的文章！