hello-scala-sbt

What is this?

An simple hello-world program in Scala using SBT as the build tool.

It illustrates the following things:

• ultra simple console app that calls out to some classes and uses external libraries
• how to use slf4j logging (based on logback)
• example of using typesafe config

Contents

• README.md : this file
• src/main/scala/net/augerhandle/hello/App.scala : the source code for the console app
• src/main/scala/net/augerhandle/hello/*.scala : other Scala classes used by the app
• build.sbt : the SBT build file used to build and run this project
• src/main/resources/logback.xml : the logging config file
• src/main/resources/application.conf : the typesafe config file

Building and Running

This is an SBT-based Scala project. I'm assuming that you have SBT installed already on your system.

To build the project, execute this command which will leave a .jar file in a ./target/scala-2.xx directory, where xx is the version of Scala SBT is using (which we don't discuss here). The .jar file will contain and executable console application.

• sbt package

To run the console application, execute the following command.

• sbt run

(If you don't use sbt to run the app -- eg, try to use java -jar or scala to run it -- you'll have trouble. Explaining that isn't in the scope of this simple example.)

As a result of running the application, you should see the usual hello world greeting in the console output, and you should also see a log file in the top-level directory, as specified in src/main/resources/logback.xml.