nequissimus / zio-slf4j

Referentially transparent logging with slf4j

zio-slf4j

Referentially transparent logging with slf4j

Don't forget to include an implementation of slf4j-api (such as logback) on your classpath.

libraryDependencies += "com.nequissimus" %% "zio-slf4j" % "0.4.1"

Usage

For a simple usage example, see sample.scala.

Scalaz

zio-slf4j's dependency on Scalaz is entirely optional. It will only be used if already available, and not brought in transitively.

If Scalaz is availble on the application's classpath, methods using Show can be used. Otherwise, log messages will need to be of type String.

zio-slf4j's Issues

Howto in README.

Hi,

Can you show how to use the library in README? I did tried putting in the library and define App with Slf4jLogger, overwriting clazz and import scalaz's implicit for Show[String] but that still throws errors on def not found. Thanks for your help.

Mapped Diagnostic Context ?

Are there any plans to integrate MDC?

Because of the "classic" MDC implementation using thread locals not working very well in thread-shifting environments like ZIO (or pretty much anything else in Scalaland), having this enabled out of the box (i.e. without the user having to manually mess with fiber-locals or such) would be the killer feature for this library.

Improve documentation

I just took a quick look at this library but was unable to figure out what exactly it provides and how it is meant to be used from the README.md as well as the sample.scala.

How do I log?
Best-practices?
Trade-offs?
Gotchas?

IMHO and at the very least the sample.scala should contain a few comments to highlight what it's meant to express...

Could we get rid of Scalaz dependency?

I have an application with ZIO but don't want to add Scalaz to my dependencies. Any chance to get the logger just for String, and not require Scalaz.Show ?

How to provide the Logger to the env in v 0.1.8?

Hi,

I am trying out following your example. However, I am on Scala 2.11.X and I can only use v. 0.1.8. With that, I am getting:

Error:(213, 22) type mismatch;
found : scalaz.zio.ZIO[nequi.zio.logger.Logger with scalaz.zio.console.Console with scalaz.zio.clock.Clock,Nothing,Int]
required: scalaz.zio.ZIO[Environment,Nothing,Int]
(which expands to) scalaz.zio.ZIO[scalaz.zio.clock.Clock with scalaz.zio.console.Console with scalaz.zio.system.System with scalaz.zio.random.Random with scalaz.zio.blocking.Blocking,Nothing,Int]
program(arr).fold(_ => 0, _ => 1)

How do I provide Logger to the program? Thanks for your help.