服务是可以伸缩的

c)Services are available.

服务是可用的

d)Services are responsive.

服务是可以相应的

e)Services are disciplined and do not block their clients for long.

服务是遵守规则的，不能长时间阻塞客户端进程。

Essentials

设计要点

1.Place service code in a class library, not in any hosting EXE.

服务类应该定义在类库而不是exe宿主里。

2.Do not provide parameterized constructors to a service class, unless it is a singleton

that is hosted explicitly.

不要给服务类提供参数化的构造函数，除非其是singleton单例模式，并且确定宿主。

3.Enable reliability in the relevant bindings.

在相关的绑定里启用可靠性。

4.Provide a meaningful namespace for contracts.For outward-facing services, use your company’s URL or equivalent URN with a year and month to support versioning.

For example:

为契约定义有意义的命名空间。暴露的外部服务，使用公司的URL或URN，并附上年月日等支持版本化。

例如：

[ServiceContract(Namespace = "http://www.idesign.net/2009/06")]

interface IMyContract

{...}

For intranet services, use any meaningful unique name, such as MyApplication.

对于企业内部服务，使用唯一的有意义的名字，比如MyApplication。

For example:

例如: