Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
507 views
in Technique[技术] by (71.8m points)

c# - Is it a good practice to have logger as a singleton?

I had a habit to pass logger to constructor, like:

public class OrderService : IOrderService {
     public OrderService(ILogger logger) {
     }
}

But that is quite annoying, so I've used it a property this for some time:

private ILogger logger = NullLogger.Instance;
public ILogger Logger
{
    get { return logger; }
    set { logger = value; }
}

This is getting annoying too - it is not dry, I need to repeat this in every class. I could use base class, but then again - I'm using Form class, so would need FormBase, etc. So I think, what would be downside of having singleton with ILogger exposed, so veryone would know where to get logger:

    Infrastructure.Logger.Info("blabla");

UPDATE: As Merlyn correctly noticed, I've should mention, that in first and second examples I am using DI.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

I put a logger instance in my dependency injection container, which then injects the logger into the classes which need one.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...