Returns a spawn action that, when executed, creates a process with a #:subscriber endpoint listening for every message. Each EndpointEvent received by the endpoint is printed to the current output port. Using this process gives a crude trace of activity within a VM: presence-events and absence-events (of #:publishers) are logged, as is each 'publisher message sent to the VM’s network.

Set the MARKETPLACE_LOG environment variable to "debug", "info", "warning", "error" or "fatal" (i.e. any of Racket’s log-level?s) to enable output of log messages at that level and higher.

Analogous to Racket’s core log-message, but uses marketplace-root-logger instead of the system logger. The level expression must evaluate to a level symbol (see log-level?), and format-str must evaluate to a format string for use with format.

The root logger for marketplace logging.

Translates a spawn action to another spawn action which wraps the to-be-spawned process in a debugging interface. Executing the resulting action will not only create a process in the executing VM, but will also open a debugger GUI.