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  • Book Overview & Buying Scala for Java Developers
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Scala for Java Developers

Scala for Java Developers

By : Thomas Alexandre
4.3 (16)
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Scala for Java Developers

Scala for Java Developers

4.3 (16)
By: Thomas Alexandre
Buy this Book

Overview of this book

Table of Contents (19 chapters)
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Scala for Java Developers
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Scala for Java Developers
Credits
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Credits
Foreword
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Foreword
About the Author
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About the Author
Acknowledgments
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Acknowledgments
About the Reviewers
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About the Reviewers
www.PacktPub.com
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www.PacktPub.com
Preface
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Preface
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1
Programming Interactively within Your Project
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Programming Interactively within Your Project
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Advantages of using Scala for Java projects
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Learning Scala through the REPL
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Operations on collections
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Summary
2
Code Integration
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Code Integration
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Creating a REST API from an existing database
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Adding a test in Scala
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Setting up Scala within a Java Maven project
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Scala and Java collaboration
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Differences in style between Java and Scala code
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Summary
3
Understanding the Scala Ecosystem
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Understanding the Scala Ecosystem
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Inheriting Java Integrated Development Environments (IDEs)
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Building with Simple Build Tool (SBT)
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Experimenting with Scala Worksheets
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Working with HTTP
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Taking advantage of Typesafe Activator
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The REPL as a scripting engine
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Summary
4
Testing Tools
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Testing Tools
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Writing tests with ScalaTest
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Testing with ScalaCheck
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Summary
5
Getting Started with the Play Framework
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Getting Started with the Play Framework
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Getting started with the classic Play distribution
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Getting started with the Typesafe Activator
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Architecture of a Play application
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Playing with authentication
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Practical tips when using Play
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Summary
6
Database Access and the Future of ORM
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Database Access and the Future of ORM
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Integrating an existing ORM – Hibernate and JPA
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Dealing with persistence in the Play Framework
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Replacing ORM
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Learning about Slick
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Scaffolding a Play application
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Summary
7
Working with Integration and Web Services
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Working with Integration and Web Services
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Binding XML data in Scala
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Working with XML and JSON
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Handling Play requests with XML and JSON
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Summary
8
Essential Properties of Modern Applications – Asynchrony and Concurrency
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Essential Properties of Modern Applications – Asynchrony and Concurrency
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The pillars of Concurrency
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The Async library – SIP-22-Async
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Getting started with Akka
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Summary
9
Building Reactive Web Applications
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Building Reactive Web Applications
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Describing reactive applications
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Handling streams reactively
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Experimenting with WebSockets and Iteratees in Play
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Learning from activator templates
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Playing with Actor Room
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Summary
10
Scala Goodies
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Scala Goodies
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Exploring MongoDB
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Scratching the surface of Big Data
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Introducing DSLs in Scala
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Introducing Scala.js
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Final tips
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Summary
1
Index
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Index

Scala and Java collaboration

Going back to the REPL, we are going to experiment further with mixing Scala and Java to explore some common integration needs, and in particular, testing and manipulating the Java REST API that we have built at the beginning of the chapter.

As a reminder on how to restart the REPL from the hello-scala project introduced in Chapter 1, Programming Interactively within Your Project, if you closed it in the meantime, just start a new terminal window, navigate to the root of the hello-scala project, and enter the following command in the command prompt:

> ./activator console

Converting between collection types

Let's start by comparing Java and Scala collection classes and see how we can go from one to the other. For instance, a Scala List (from the scala.collection.immutable package) is different from java.util.List, and sometimes, it can be useful to convert from one to the other. A convenient way in Java to create java.util.List is to use the java.util.Arrays...

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Tech Concepts
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Programming languages
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Scala for Java Developers
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