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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

Working with HTTP

As Scala can import and invoke Java classes as well as extend them, many of the Scala libraries available as part of the Scala ecosystem are only a thin layer on top of robust and mature Java libraries, to either provide additional features or simplify their usage by adding some syntactic sugar.

One such example is the Scala dispatch library (available at http://dispatch.databinder.net/Dispatch.html), a useful library to achieve HTTP interaction based on Apache's robust HttpClient. Let's run a little dispatch session in the REPL.

As dispatch is an external library; we first need to import it into our SBT project to be able to use it from the REPL console. Add the dispatch dependency to the build.sbt file of the SampleProject so that it looks like the following code snippet (make sure to have a blank line between statements in build.sbt):

name := "SampleProject"
…

libraryDependencies += "net.databinder.dispatch" %% "dispatch-core" % "0.11.0"

Restart the REPL to make the libraries...

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Tech Concepts
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Programming languages
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Scala for Java Developers
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