转：http://niuyi.github.io/blog/2012/04/06/autofact-by-unit-test3/
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);
}
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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);
}
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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
}
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