The Wonderful Contextual World of Scala

on YouTube ↗40m

" summary

The talk examines how to carry and use request context in Scala backend apps to collect telemetry (request duration, initiating user/system, etc.). It compares classic Java-inspired techniques like MDC/thread-local with functional Scala alternatives (Reader, cats-effect, tagless-final, Tofu) and evaluates pros and cons of each approach.

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" chapters (15)

1. 0:00Introduction
2. 2:09Context problems in apps
3. 4:16MDC for context
4. 7:50Reactive programming and context
5. 8:55Example: message web server
6. 11:42Logging context in Scala
7. 14:35Implicit context issues
8. 16:21Explicit context via args
9. 18:51Reader monad for context
10. 22:24Reader for interfaces
11. 26:18Business logic abstraction
12. 30:10Adding context to app
13. 33:21Final architecture with context
14. 35:49Choosing context approach
15. 37:36Q&A

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