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
1 [Fact] 2 public void per_dependency() 3 { 4 var builder = new ContainerBuilder(); 5 builder.RegisterType<MyClass>().InstancePerDependency(); 6 IContainer container = builder.Build(); 7 var myClass1 = container.Resolve<MyClass>(); 8 var myClass2 = container.Resolve<MyClass>(); 9 Assert.NotEqual(myClass1,myClass2); 10 }
Single Instance也很好理解，就是每次都用同一个对象
1 [Fact] 2 public void single_instance() 3 { 4 var builder = new ContainerBuilder(); 5 builder.RegisterType<MyClass>().SingleInstance(); 6
7 IContainer container = builder.Build(); 8 var myClass1 = container.Resolve<MyClass>(); 9 var myClass2 = container.Resolve<MyClass>(); 10
11 Assert.Equal(myClass1,myClass2); 12 }
Per Lifetime Scope，同一个Lifetime生成的对象是同一个实例
1 [Fact] 2 public void per_lifetime_scope() 3 { 4 var builder = new ContainerBuilder(); 5 builder.RegisterType<MyClass>().InstancePerLifetimeScope(); 6
7 IContainer container = builder.Build(); 8 var myClass1 = container.Resolve<MyClass>(); 9 var myClass2 = container.Resolve<MyClass>(); 10
11 ILifetimeScope inner = container.BeginLifetimeScope(); 12 var myClass3 = inner.Resolve<MyClass>(); 13 var myClass4 = inner.Resolve<MyClass>(); 14
15 Assert.Equal(myClass1,myClass2); 16 Assert.NotEqual(myClass2,myClass3); 17 Assert.Equal(myClass3,myClass4); 18 }
1 [Fact] 2 public void life_time_and_dispose() 3 { 4 var builder = new ContainerBuilder(); 5 builder.RegisterType<Disposable>(); 6
7 using (IContainer container = builder.Build()) 8 { 9 var outInstance = container.Resolve<Disposable>(new NamedParameter("name", "out")); 10
11 using(var inner = container.BeginLifetimeScope()) 12 { 13 var inInstance = container.Resolve<Disposable>(new NamedParameter("name", "in")); 14 }//inInstance dispose here
15 }//out dispose here
16 }
转载链接：http://niuyi.github.io/blog/2012/04/06/autofact-by-unit-test3/