def meaningOfLife(logger: Logger) = {
  ...
  log.info("Answer calculated.", result, duration)
  ...
}

One might normally have done something like log.info(s"Answer calculated in $duration: $result")? Because if you have a lot of logs and you're using a more powerful logging backend than a file and grep then you

Configuration

Configuration is done in code.

Top-level fields pass in at initialization e.g.

val log = new Logger(params=Map("service" -> "myService"))

Output

Default output:

• message
• context - e.g. aW52.br13.chVc
• data
  • other
  • ...
• logLevel
• source
  • file
  • line
  • class

Extras

FluentD

Text (stdout/err or file)

HTTP Manager

Listen on port xyz for configuration messages e.g. to change log-level

Other points

• not compatible with SL4J

Todo

• place filters inside output