AutoFac使用方法总结:Part III

生命周期

AutoFac中的生命周期概念非常重要，AutoFac也提供了强大的生命周期管理的能力。

AutoFac定义了三种生命周期：

Per Dependency Single Instance Per Lifetime Scope 

Per Dependency为默认的生命周期，也被称为’transient’或’factory’，其实就是每次请求都创建一个新的对象

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[Fact] public void per_dependency() { var builder = new ContainerBuilder(); builder.RegisterType<MyClass>().InstancePerDependency(); IContainer container = builder.Build(); var myClass1 = container.Resolve<MyClass>(); var myClass2 = container.Resolve<MyClass>(); Assert.NotEqual(myClass1,myClass2); }

Single Instance也很好理解，就是每次都用同一个对象

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[Fact] public void single_instance() { var builder = new ContainerBuilder(); builder.RegisterType<MyClass>().SingleInstance(); IContainer container = builder.Build(); var myClass1 = container.Resolve<MyClass>(); var myClass2 = container.Resolve<MyClass>(); Assert.Equal(myClass1,myClass2); }

Per Lifetime Scope，同一个Lifetime生成的对象是同一个实例

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[Fact] public void per_lifetime_scope() { var builder = new ContainerBuilder(); builder.RegisterType<MyClass>().InstancePerLifetimeScope(); IContainer container = builder.Build(); var myClass1 = container.Resolve<MyClass>(); var myClass2 = container.Resolve<MyClass>(); ILifetimeScope inner = container.BeginLifetimeScope(); var myClass3 = inner.Resolve<MyClass>(); var myClass4 = inner.Resolve<MyClass>(); Assert.Equal(myClass1,myClass2); Assert.NotEqual(myClass2,myClass3); Assert.Equal(myClass3,myClass4); }

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[Fact] public void life_time_and_dispose() { var builder = new ContainerBuilder(); builder.RegisterType<Disposable>(); using (IContainer container = builder.Build()) { var outInstance = container.Resolve<Disposable>(new NamedParameter("name", "out")); using(var inner = container.BeginLifetimeScope()) { var inInstance = container.Resolve<Disposable>(new NamedParameter("name", "in")); }//inInstance dispose here }//out dispose here }

转自：http://niuyi.github.io/blog/2012/04/06/autofact-by-unit-test3/