Why some Console.printLine is not getting printed here

[yadavan88]

Hi,
I am trying to look into an issue with one of the sample code in baeldung article. However, I am not very knowledgeable with ZIO. Could someone help me to understand what is the issue here and how to fix it?

Print statements inside class LoggingLive is not getting printed.

Here is the code:

//> using dep dev.zio::zio:2.0.20

import zio._

object ModulePatternExample extends ZIOAppDefault {
  val myApp = for {
    _ <- Logging.log("Application Started!")
    _ <- Console.printLine("Hello! What is your name?")
    n <- Console.readLine
    _ <- Logging.log(s"User name: $n")
    _ <- Console.printLine("Hello, " + n + ", good to meet you!")
    _ <- Logging.log("Application Exited!")
  } yield ()

  def run = myApp.provide(
    LoggingLive.layer
  )

}
// Service Definition
trait Logging {
  def log(line: String): UIO[Unit]
}

// Companion object containing accessor methods
object Logging {
  def log(line: String): URIO[Logging, Unit] =
    ZIO.serviceWith[Logging](_.log(line))
}

// Live implementation of Logging service
class LoggingLive extends Logging {
  override def log(line: String): UIO[Unit] =
    for {
      current <- Clock.currentDateTime
      _ <- Console.printLine(s"$current--$line").orDie
    } yield ()
}

// Companion object of LoggingLive containing the service implementation into the ZLayer
object LoggingLive {
  val layer: URLayer[Any, Logging] =
    ZLayer.succeed(new LoggingLive)
}

Thanks in advance

[adamgfraser]

Hi! There is an error in the code you posted. The code uses serviceWith when it should use serviceWithZIO since you want to access the service and use it to run a workflow. Once you make this change the example works as expected.

[yadavan88]

Hi @adamgfraser Thank you so much for quick response. It works now :)