package log4j

  1. Public
  2. All

Type Members

  1. case class Event(time: DateTime, logger: String, lvl: Level, ctx: Option[Map[String, String]], msg: Json) extends Product with Serializable

  2. final class JsonLayout extends AbstractStringLayout


Value Members

  1. object Event extends Serializable

  2. object JsonLayout

    JsonLayout is an alternate layout that outputs each line as a JSON object.

    JsonLayout is an alternate layout that outputs each line as a JSON object. It does not attempt to produce a file that contains valid JSON however, and would need additional processing to turn this series of distinct objects into a well formed JSON array. It is specifically designed for processing each log message as a separate JSON object.

    To use it, you simply need to log JsonMessage objects, which you can easily produce by mixing in the JsonLogging trait, importing JsonLogging._ and having an argonaut.EncodeJson[Foo] in scope for the Foo object you want to log. This EncodeJson instance is then used to control the format of the log output.

    If you do not have an EncodeJson for the message object, then it will fall back to a String representation given by the Show[Foo] instance in scope.


    import argonaut._, Argonaut._
    trait Foo { def bar: Bar }
    object Foo extends JsonLogging {
      import JsonLogging._
      def foozle(foo: Foo) =
      implicit val FooEncoder: EncodeJson[Foo] =
        // assuming there is already an EncodeJson[Bar]
        EncodeJson { foo =>
          ("foobar" := foo.bar) ->: Json.jEmptyObject
        // results in {"foo":{"bar":"..."}}

    see http://argonaut.io/doc/codec/ for more details on how to build an EncodeJson