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02_scala-real-life-project.html
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<!doctype html>
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<meta name="description" content="Apache Spark 2 Workshop | Scala — Real-Life Scala Project">
<meta name="author" content="Jacek Laskowski">
<title>Apache Spark 2 Workshop | Scala — Real-Life Scala Project</title>
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<h1>Real-Life <br> Scala Project</h1>
<h4 style="font-size: smaller;"><a href="https://twitter.com/jaceklaskowski">@jaceklaskowski</a> / <a href="http://stackoverflow.com/users/1305344/jacek-laskowski">StackOverflow</a> / <a href="https://github.com/jaceklaskowski">GitHub</a><br />
Books: <a href="http://bit.ly/mastering-apache-spark">Mastering Apache Spark</a> / <a href="http://bit.ly/mastering-spark-sql">Mastering Spark SQL</a> / <a href="http://bit.ly/spark-structured-streaming">Spark Structured Streaming</a></h4>
<footer style="font-size: small;">©<a href="https://medium.com/@jaceklaskowski">Jacek Laskowski</a> 2018 / @jaceklaskowski / [email protected]</footer>
</section>
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## Agenda
1. [Objectives (Part 1)](#/objectives-part1)
1. [Objectives (Part 2)](#/objectives-part2)
1. [Objectives (Part 3)](#/objectives-part3)
</script>
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<section id="objectives-part1" data-markdown>
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## Objectives <small>Part 1</small>
1. This is a real-life Scala application
1. Listing files (Java Interop)
* [Files.list](https://docs.oracle.com/javase/8/docs/api/java/nio/file/Files.html#list-java.nio.file.Path-)
* import [JavaConverters](https://www.scala-lang.org/api/2.12.x/scala/collection/JavaConverters$.html)
1. Loading files
* [Source](https://www.scala-lang.org/api/2.12.x/scala/io/Source$.html) object
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## Objectives <small>Part 2</small>
1. Parsing the content of a file
* Files with a header and a body
* [Pattern matching](https://docs.scala-lang.org/tour/pattern-matching.html)
* [Regular expressions](https://docs.scala-lang.org/tour/regular-expression-patterns.html)
1. Sort files by headers (not file names)
1. [scopt](https://github.com/scopt/scopt) library for command line options parsing
1. [sbt-assembly](https://github.com/sbt/sbt-assembly) plugin for "fat" JARs
* mainClass in assembly
* **java -jar** is back!
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## Objectives <small>Part 3</small>
1. Logging in Scala using [scala-logging](https://github.com/lightbend/scala-logging) library
* [LazyLogging](https://github.com/lightbend/scala-logging#using-scala-logging)
* [slf4j-log4j12](https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12) dependency
1. [scalatest](http://www.scalatest.org/) testing library
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</section>
<section id="recap" data-markdown>
<script type="text/template">
<!-- .slide: style="font-size: 90%" -->
## Recap
1. [Objectives (Part 1)](#/objectives-part1)
1. [Objectives (Part 2)](#/objectives-part2)
1. [Objectives (Part 3)](#/objectives-part3)
</script>
</section>
<section style="text-align: left" data-markdown id="questions">
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# Questions?
* Read [Mastering Apache Spark 2](https://bit.ly/mastering-apache-spark)
* [https://bit.ly/mastering-apache-spark](https://bit.ly/mastering-apache-spark)
* Read [Mastering Spark SQL](https://bit.ly/mastering-spark-sql)
* [https://bit.ly/mastering-spark-sql](https://bit.ly/mastering-spark-sql)
* Follow [@jaceklaskowski](https://twitter.com/jaceklaskowski) on twitter
* Upvote [my questions and answers on StackOverflow](http://stackoverflow.com/users/1305344/jacek-laskowski)
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