将LogService添加到我的应用程序

问题描述

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我有一个应用程序(旧版代码)

包含带有`save()`方法的接口`Icomponent`

和许多实现它的类.

我想在每个save()之后添加日志.



我以为

将装饰器模式与其他`log()`方法一起用于`Icomponent`.

创建从每个装饰器的log()中调用的LogService类.
我认为LogService是singelton的经典案例，但我读过它很难进行单元测试.

I have an application (Legacy code)

that contains interface `Icomponent` with `save()` methods

and many classes that implement it.

I want to add log after every save().



I thought to

use the decorator pattern to `Icomponent` with additional `log()` method.

create `LogService` class which is called from each decorator''s `log()`

I think `LogService` is a classic case of singelton, but I read it would be hard for unit-testing.


What would be you design to that solution?

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