os/glog: When should I use Writer , and when should I use Handler ? Why?

[RyoJerryYu]

What do you want to ask?

Writer and Handler seem to have a lot of overlapping responsibilities. In fact, they both have an example code in documentation that do the exactly same thing that write logs to Graylog.

• https://goframe.org/pages/viewpage.action?pageId=1114336
• https://goframe.org/pages/viewpage.action?pageId=17207121

So, why there are two method to do the same work? What's the difference? Which is the recommended one?

[gqcn]

@RyoJerryYu Hello,

• The Writer is an underlying interface, which just accepts the content bytes and outputs to the destination you can customize.
• The Handler is a more higher level callback function in which you can customize the logging content, color, prefix, etc. It is more flexable and extensible than Writer.