Meta - Add Scala support

[lreuven]

per requests, I'm adding this as a FR.

[felixbarny]

Which frameworks are the most important ones? I assume Akka and Play?

[lreuven]

yap but I would like to have more feedback on that

[PerWiklander]

I would add Lagom to that list, but since Lagom uses Akka and Play, and Play uses Akka, the answer might just be "Akka".

I guess it comes down which scope is feasible. Should the agent report on http requests only (Akka Http then) or general Akka actor interaction as well? And in case of the latter, is there a priority of what parts of Akka to add more details to? One that comes to mind is the PersistentActor, aka. Event Sourcing or the C in CQRS.

My personal wish list, working on a Lagom project would be:

• HTTP requests (Akka Http)
• DB (read) queries For me this should/could be covered by the existing JDBC support (I use Slick with Postgres), but the recommended/default db layer in Lagom projects is Cassandra.
• Commands -> Events -> DB (write) queries. This includes Akka Persistence and Persistence Query plus (for me) JDBC.

Existing solutions (?)

• https://github.com/deltaprojects/lagom-opentracing Supports HTTP tracing and CQRS tracing, but as a library, not automatically.
• https://github.com/levkhomich/akka-tracing Looks promising for general Akka actor tracing
• https://developer.lightbend.com/docs/telemetry/current/home.html The cheat sheet, Lightbend's own monitoring solution, but requires a Lightbend subscription ($$$).

[cbrunnkvist]

Documenting some good practices and a showing proof-of-concept code for some "typical" bare bones monolith (maybe it's (Akka+)Play with Slick/HikariCP) would be good enough to allow people to get started in the right direction at least.

[crocker]

Twitter's Finatra and Finagle frameworks would be good additions as well.

[lssilva]

Finagle, I think with finagle a few others will be supported by default, Finatra, Finch