Lightbend Activator

Atomic Scala Examples

Activator will be EOL-ed on May 24, 2017.

We’re making it easier and simpler for developers to get started with Lightbend technologies. This unfortunately means that future releases of Play, Akka and Scala will no longer include Activator support, and Lightbend’s Activator server will be decommissioned by the end of 2017. Instead of supporting Activator to create and set up development projects, we'll be supporting standard Giter8 templates for sbt users and Maven archetypes for Maven users. So going forward,

To create new Lightbend projects

Instead of using the Activator command, make sure you have sbt 0.13.13 (or higher), and use the “sbt new” command, providing the name of the template. For example, “$ sbt new akka/hello-akka.g8”. You can find a list of templates here.

Also, as a convenience, the Lightbend Project Starter allows you to quickly create a variety of example projects that you just unzip and run.

To create new templates

If you want to create new templates, you can now do that in Giter8.

To migrate templates from Activator to Giter8

If you created Activator templates in the past, please consider migrating them to Giter8 with this simple process.

Atomic Scala Examples

February 18, 2015

Code examples for Atomic Scala.

How to get "Atomic Scala Examples" on your computer

There are several ways to get this template.

Option 1: Choose atomic-scala-examples in the Lightbend Activator UI.

Already have Lightbend Activator (get it here)? Launch the UI then search for atomic-scala-examples in the list of templates.

Option 2: Download the atomic-scala-examples project as a zip archive

If you haven't installed Activator, you can get the code by downloading the template bundle for atomic-scala-examples.

  1. Download the Template Bundle for "Atomic Scala Examples"
  2. Extract the downloaded zip file to your system
  3. The bundle includes a small bootstrap script that can start Activator. To start Lightbend Activator's UI:

    In your File Explorer, navigate into the directory that the template was extracted to, right-click on the file named "activator.bat", then select "Open", and if prompted with a warning, click to continue:

    Or from a command line:

     C:\Users\typesafe\atomic-scala-examples> activator ui 
    This will start Lightbend Activator and open this template in your browser.

Option 3: Create a atomic-scala-examples project from the command line

If you have Lightbend Activator, use its command line mode to create a new project from this template. Type activator new PROJECTNAME atomic-scala-examples on the command line.

Option 4: View the template source

The creator of this template maintains it at

Option 5: Preview the tutorial below

We've included the text of this template's tutorial below, but it may work better if you view it inside Activator on your computer. Activator tutorials are often designed to be interactive.

Preview the tutorial

Atomic Scala

Atomic Scala introduces the foundations of the Scala programming language in very small steps (which we call atoms). The book is designed to simplify learning the language for both beginners and experienced programmers. To get started download the first hundred pages of the book.

Continue the Tutorial

Run the Examples

All of the examples from the book can be found in the examples directory. Select a file to edit it. Run an example from the Activator UI by editing ExampleRunner.scala and putting the file name into the getOrElse part, like:

Then in Run click the Start button. After the successful build of the code, you will see a list of main classes, ExampleRunner should be selected but if it's not, select that one. Whenever the code changes, the file specified in ExampleRunner.scala will automatically be re-run. If you want to run a different file simply change the file name there and click the Save button.

The examples can also be run from the command line by running the following from the main project directory (omit the ./ on Windows):
./activator "run-main ExampleRunner"
You can also specify the example to run from the command like, like:
./activator "run-main ExampleRunner DivZero.scala"