Sunday, 22 March 2015

Need to make a quick json fixes - JSONPath for rescue

From time to time I have a need to do some fixes in my json data. In a world of flat files I do this with grep/sed/awk tool chain. How to handle it for JSON? Searching for a solution I came across the JSONPath. It quite mature tool (from 2007) but I haven't hear about it so I decided to share my experience with others.

First of all you can try it without pain online: Full syntax is described at

Tuesday, 3 March 2015

Enums for scala

Scala has very limited implementation of Enumeration. Enumerated objects can't extends other classes. Partial replacement for it is to use sealed classes. You can do pattern matching on them. When you ommit some possible value you will get compiler warning for not exhaustive pattern matching. One missing feature is that you can't get sorted values of all objects extending them. You can simple got it using my (40-lines) EnumOf class from scala-enum. Examples below.


sealed abstract class Color(red: Double, green: Double, blue: Double)

object Color extends EnumOf[Color] {
  case object Red   extends Color(1, 0, 0)
  case object Green extends Color(0, 1, 0)
  case object Blue  extends Color(0, 0, 1)
  case object White extends Color(0, 0, 0)
  case object Black extends Color(1, 1, 1)

Sunday, 22 February 2015

micro-burn has Trello integration

After a few long evenings I've finally integrated micro-burn with Trello. All you need to run it for your Trello board is to write short configuration and run fat jar. It renders burndown chart visualising progress of cards on your board.

You can specify story points adding them in curly braces inside card title, use Scrum for Trello browser extension or define default story points number for user stories. Completed checklist items are treated as a part of work done inside card. You can manage sprints on your own: creating new, specifying start/end/name, finishing or turn on full automatic mode: sprints will be created periodically.

Sprint management in usage:

Saturday, 3 January 2015

Sample for lift-ng: Micro-burn 1.0.0 released

During a last few evenings in my free time I've worked on mini-application called micro-burn. The idea of it appear from work with Agile Jira in our commercial project. This is a great tool for agile projects management. It has inline tasks edition, drag & drop board, reports and many more, but it also have a few drawbacks that turn down our team motivation.