07 November 2014

Build Scala In Play Framework

This is not the only post you will find on the internet about it, I create a personal post here more as a personal reference.

Play Framework makes it easy to build web applications with Java & Scala. Play is based on a lightweight, stateless, web-friendly architecture. Built on Akka, Play provides predictable and minimal resource consumption (CPU, memory, threads) for highly-scalable applications.

Example is built on mac os x. Scala Project in Play Framework.

Install Scala:

Install: scala-2.10.3 horstmann.com/scala/install

$ brew install scala

Then, add Scala to Path:

$ PATH=/opt/local/bin:/Users/{yourName}/workspace/scala-2.10.3/bin:/opt/local/sbin:$PATH
## or
$ export PATH=$PATH:/Users/{yourName}/workspace/scala-2.10.3/bin/

Then use $scala, you shall enter the world of scala >

$ scala
scala >

Install play framework:

You can use the following command:

$ brew install --devel play

You can check latest version by:

$ brew update
$ brew info play

Or go to the formula file:

https://github.com/mxcl/homebrew/blob/master/Library/Formula/play.rb

Then, add Play to Path:

$ export PATH=$PATH:/Users/{yourName}/Documents/play-2.1.1/
##  or
$ export PATH=$PATH:/Users/{yourName}/.../play-2.1.3/

Play: Create new project:

Step1 Build project:

$ play new KevFirstPlay

Step2 Open project:

$ cd kevFirstPlay

Step3 Launch:

$ play

Then you lanuch your first play app!

You can also use compile/run to start your project:

[My first application] $ compile
[My first application] $ run

Step4: Review in browser after server is running:

http://localhost:9000/

(Server started, use Ctrl+D to stop and go back to the console)

Play Plus IDE: (i.e. Eclipse)

Play provides a command to simplify Eclipse configuration. To transform a Play application into a working Eclipse project, use the eclipse command:

without the source jars:

[My first application] $ eclipse

If you want to grab the available source jars (this will take longer and it’s possible a few sources might be missing):

[My first application] $ eclipse with-source=true

Note if you are using sub-projects with aggregate, you would need to set skipParents appropriately:…or from the play console, type:

[My first application] $ eclipse skip-parents=false

Then import from IDE.

Tip: Do not commit Eclipse configuration files when you work in a team!