Hi, I built a small library for Android, it helps you to add custom annotations on retrofit calls an...

# android

[Omar Ahmed]

Hi, I built a small library for Android, it helps you to add custom annotations on retrofit calls and retrieve them later via interceptor

Check it out and give me your feedback
https://t.co/FF72E0GR1s

[trevjones]

I think there is an easier way. but i have not played with it yet. Retrofit adds an implicit Tag called Invocation that has a reference to the Method at which point you can query for custom annotations via the normal reflection api's.

All of which can be done in an interceptor without the need for a custom call adapter factory.

[trevjones]

Been meaning to POC this out. let me see what I can throw together today and i'll post back here

[trevjones]

ok here we go. https://github.com/trevjonez/retrofit-anno-interceptor

[trevjones]

single base class that is pretty damn simple. then the test file has an example use-case

[trevjones]

something wrong in the way I am mutating the request but proves that it at least picked up the annotation and tried to muck with it

[Omar Ahmed]

very cool that's a better and simpler way to do it 👏

[Omar Ahmed]

i wasn't aware that retrofit add Invocation Tag to all its requests

[trevjones]

I knew about tag. but Jesse wilson is who got me thinking about how to do some of this easier. https://twitter.com/jessewilson/status/1231569857986035712

[trevjones]

only other note i'd add about that, is the call to Method.getAnnotation(Class<T>) might be expensive and worth caching in a map. ie val annotationCache: MutableMap<Method, T> where T is the annotation.

[Omar Ahmed]

yes totally agree caching annotation worth it