View Logger output?

[dmcollie]

Is it possible to view the output from Logger in a LiveBook? I am trying to explore the Tortoise API using a Livebook and have created a handler to log any messages:

Tortoise.Supervisor.start_child(
      client_id: "heart-of-gold",
      handler: {Tortoise.Handler.Logger, []},
      server: {Tortoise.Transport.Tcp, host: 'localhost', port: 1883}
    )

I then send a message:

Tortoise.publish("heart-of-gold", "foo/bar", "Hello from the World of Tomorrow !", qos: 0)

Somehow I'd like to see the updated Logger output in the LiveBook.

TIA

[josevalim]

What is your Livebook version? We do show logs, except in attached mode (which may be too verbose).

[dmcollie]

It's LiveBook 0.7.1. It's possible that I'm not understanding how to view the logs. I am new at Elixir and LiveBook. I've attached my LiveBook if that helps.

On October 15, 2022, Elle Imhoff ***@***.***> wrote: What is your Livebook version? We do show logs, except in attached mode (which may be too verbose).

— Reply to this email directly, view it on GitHub <https://github.com/livebook- dev/livebook/discussions/1490#discussioncomment-3886521>, or unsubscribe <https://github.com/notifications/unsubscribe- auth/AABTCBWWOZ6HXIIUZN3SEKLWDL2VJANCNFSM6AAAAAARGAIS5Q>. You are receiving this because you authored the thread.Message ID: <livebook-dev/livebook/repo- ***@***.***> # Tortoise ```elixir Mix.install([ {:tortoise, "~> 0.10.0"} ]) ``` ## Preamble ```elixir require Logger ``` ## Start the supervisor and send a message ```elixir Tortoise.Supervisor.start_child( client_id: "heart-of-gold", handler: {Tortoise.Handler.Logger, []}, server: {Tortoise.Transport.Tcp, host: 'localhost', port: 1883} ) ``` ```elixir Tortoise.publish("heart-of-gold", "foo/bar", "Hello from the World of Tomorrow !", qos: 0) ```

[josevalim]

Yeah, I would expect that to work. Does a Logger.debug("hello") work? If so, maybe Tortoise is not doing any logging?

[dmcollie]

Jose Sorry for not replying sooner. I have been AFK due to family illness. The Logger.debug statement works as expected. However I think I haven't explained myself very well. I'd like to get a live update of the Logger contents because I want to send mqtt messages from outside the Livebook and have the Logging statements generated by the messages handled by the Tortoise supervisor displayed inside the LiveBook. I want to do this because I'm using LiveBook to explore a prototype implementation of an intent handler for Rhasspy <https://rhasspy.readthedocs.io/en/latest/intent-handling/>.

On October 16, 2022, Elle Imhoff ***@***.***> wrote: Yeah, I would expect that to work. Does a Logger.debug("hello") work? If so, maybe Tortoise is not doing any logging?

— Reply to this email directly, view it on GitHub <https://github.com/livebook- dev/livebook/discussions/1490#discussioncomment-3890649>, or unsubscribe <https://github.com/notifications/unsubscribe- auth/AABTCBSTRASYP75TFLCEMY3WDRBPVANCNFSM6AAAAAARGAIS5Q>. You are receiving this because you authored the thread.Message ID: <livebook-dev/livebook/repo- ***@***.***>