Enable / Disable acotrs to monitor

[lashford]

Have the ability to Enable / Disable actors to monitor, maybe sensible to have this feature in a config file. There may be some refactoring done here to ensure this actor disabling / enabling is clean throughout the pointcuts.

By default included and excluded are empty, where empty included implies everything is included and empty excluded implies nothing is excluded. As soon as you specify an entry for included and excluded, the usual system first checks whether an actor is included; if so, checks whether it is not excluded. If both tests pass, the system then proceeds to record the counters and gauges.

Configure the included and excluded elements in the akka child of the org.eigengo.monitor.agent config.

org.eigengo.monitor.agent {
    output {
        class: "org.eigengo.monitor.TestCounterInterface"
    }


    akka {
        includeRoutees: true
        included: [ "akka://systemName/user/foo/bar", "akka://systemName/user/foo/baz" ]
        excluded: [ "akka://systemName/user/quux" ]
    }
}

Syntax for the included and excluded elements is one of:

• akka://actor-system-name/user/concrete/path
  specific path in a specific actor system
• akka://*/user/concrete/path
  specific path in any actor system
• akka://*/user/*/any-child
  any actor system name, with actor name matching user / any / any-child
• akka:actor-system-name.com.foo.BarActor
  specific actor type (com.foo.BarActor) in a specific actor system (actor-system-name)
• akka:*.com.foo.BarActor
  specific actor type (com.foo.BarActor) in a any actor system