Resource composition in cats-effect with the Resource data type - Scala tutorial

A tutorial explaining how to compose dependent resources in Scala using the Resource data type from cats-effect.

In this video, you'll see how you can build resources that depend on each other in cats-effect, using the Resource type! We'll look at what Resource is, how to build an instance of it, and how to run a long-running program started with Resource, like a HTTP server. 0:00 - Intro, recap of `bracket` 0:36 - problem description 1:10 - naive implementation with `bracket` 1:50 - introduction of the `Files` algebra 4:00 - introduction of Resource 4:45 - improved solution with Resource 6:44 - using a Resource 9:20 - solution cleanup, `fromAutoCloseable`, moving Blocker to the for comprehension 13:05 - overview of the order of resource acquisition/cleanup at the point of `use` 15:30 - introducing our Tagless Final algebra 17:28 - simulating long-running applications - Async.never, IO[Nothing] 19:19 - constructing Tagless Final algebra instances inside Resource 21:05 - running the application using `Resource.use` 22:02 - parting words Previous videos: Bracket - youtube.com/watch?v=vsJz-fdEsd4 Blocker - youtube.com/watch?v=v__IRT-QkwY If you want to learn more about Resource, see the Cats Effect docs: typelevel.org/cats-effect/datatypes/resource.html Read the code: github.com/kubukoz/videos/tree/master/resource Cats-effect: github.com/typelevel/cats-effect Follow me on Twitter: twitter.com/kubukoz Read my blog: blog.kubukoz.com Let me know if you liked this video, and whether you'd like to see any other functional programming topics here.