ZIO learning - using zio logging great features / published by https://github.com/dacr/code-examples-manager #5dd422d4-9a90-4450-bd24-23a46ee351b9/d821fe352fb4400854d6185cc7e0175d8d07f47a

zio-learning-logging-3-features.sc

// summary : ZIO learning - using zio logging great features
// keywords : scala, zio, learning, logging, pure-functional, @testable
// publish : gist
// authors : David Crosson
// license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2)
// id : 5dd422d4-9a90-4450-bd24-23a46ee351b9
// created-on : 2022-06-30T22:08:34+02:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// ---------------------
//> using scala "3.4.2"
//> using dep "dev.zio::zio:2.0.13"
//> using dep "dev.zio::zio-logging:2.1.13"
// ---------------------

import zio.*
import zio.logging.*
import ZIOAspect.*

object Encapsulated extends ZIOAppDefault {

  val doThat =
    ZIO.logSpan("doThat") {
      ZIO.succeed(true) @@ logged("result")
    }

  val getIt =
    ZIO.logSpan("processThat") {
      for {
        x <- ZIO.succeed(42)
        _ <- doThat
        _ <- ZIO.logInfo(s"$x has been received")
      } yield x
    }

  val myapp =
    ZIO.logSpan("myapp") {
      for {
        _      <- ZIO.logInfo("Application has started")
        _      <- ZIO.logWarning("Configuration is wrong")
        userId <- Random.nextUUID
        result <- getIt @@ annotated("userId" -> userId.toString) @@ logged("getIt result") // The result is appended :) Great !!!
        _      <- ZIO.logInfo("Application has finished")
      } yield ()
    }

  def run = myapp
}

Encapsulated.main(Array.empty)