Play Framework Cookbook - Second Edition

Play Framework Cookbook - Second Edition

By : Alexander Reelsen, Giancarlo Inductivo

Buy this Book

Play Framework Cookbook - Second Edition

By: Alexander Reelsen, Giancarlo Inductivo

Buy this Book

Overview of this book

<p>As web and mobile systems become more sophisticated, anchoring systems in a mature, solid framework has become increasingly important. Play 2 provides developers with the necessary tools to build robust web applications.</p> <p>This book is a compilation of useful recipes aimed at helping developers discover the power of Play 2. The introductory section serves as a primer to Play Framework, wherein all the fundamentals of the framework are covered extensively. It then explains the usage of controllers and how modules can be leveraged for optimal performance. Next, the book walks you through creating and using APIs, followed by extensive real-world applications. Finally, you will learn to manage applications post production.</p>

Play Framework Cookbook Second Edition

Credits

About the Authors

About the Reviewers

www.PacktPub.com

Preface

Free Chapter

Basics of Play Framework

Introduction

Installing Play Framework

Creating a Play application using Typesafe Activator

Using the Play console

Working with modules

Working with controllers and routes

Using Action parameters in controllers

Using reverse routing and redirects

Working with View templates

Using helper tags

Using View layouts and Includes

Working with XML and text files

Using Ebean (Java) with MySQL

Using Anorm (Scala) and database evolutions with MySQL

Using a form template and web action

Using form validation

Securing form submission

Testing with JUnit (Java) and specs2 (Scala)

Using Controllers

Using futures with Akka actors

Leveraging Modules

Introduction

Dependency injection with Spring

Dependency injection using Guice

Utilizing MongoDB

Utilizing MongoDB and GridFS

Utilizing Redis

Integrating Play application with Amazon S3

Integrating with Play application Typesafe Slick

Utilizing play-mailer

Integrating Bootstrap and WebJars

Creating and Using Web APIs

Introduction

Creating a POST API endpoint

Creating a GET API endpoint

Creating a PUT API endpoint

Creating a DELETE API endpoint

Securing API endpoints with HTTP basic authentication

Consuming external web APIs

Using the Twitter API and OAuth

Creating Plugins and Modules

Introduction

Creating and using your own plugin

Building a flexible registration module

Using the same model for different applications

Managing module dependencies

Adding private module repositories using Amazon S3

Practical Module Examples

Introduction

Integrating a Play application with message queues

Integrating a Play application with ElasticSearch

Implementing token authentication using JWT

Deploying Play 2 Web Apps

Introduction

Deploying a Play application on Heroku

Deploying a Play application on AWS Elastic Beanstalk

Deploying a Play application on CoreOS and Docker

Deploying a Play application with Dokku

Deploying a Play application with Nginx

Additional Play Information

Introduction

Testing with Travis CI

Monitoring with New Relic

Integrating a Play application with AngularJS

Integrating a Play application with Parse.com

Creating a Play development environment using Vagrant

Coding Play 2 web apps with IntelliJ IDEA 14

Index

Customer Reviews

5 star

4 star

3 star

2 star

1 star

Testing with JUnit (Java) and specs2 (Scala)

It is quite important for a web framework to integrate testing as seamlessly as possible with the web framework itself. This minimizes the friction developers encounter when coding functional specs and writing tests to validate their work. For Play Java projects, we will be utilizing the popular test framework JUnit. We will be using it to do a simple unit test and to test our model and controller action. For Play Scala projects, we will be using specs2 to do a simple unit test and to test our model, a controller action, and a route mapping.

How to do it...

For Java, we need to take the following steps:

Create a new spec class, ProductTest.java, in test/ and add the following content:

    import static org.junit.Assert.*;
    import org.junit.Test;

    public class ProductTest {
    
      @Test
      public void testString() {
        String str = "product";
        assertEquals(7, str.length());
      }
    }

Run the first spec using Activator by running the command test-only ProductTest:

    $ activator
    [info] Loading project definition from /private/tmp/foo_java/project
    [info] Set current project to foo_java (in build file:/private/tmp/foo_java/)
    [foo_java] $ test-only ProductTest
    [info] Compiling 3 Java sources to /private/tmp/foo_java/target/scala-2.11/test-classes...
    [info] Passed: Total 1, Failed 0, Errors 0, Passed 1
    [success] Total time: 3 s, completed 09 29, 14 8:44:31 PM

For Scala, we need to take the following steps:

Create a new Spec class, ProductSpec.scala, in test/ and add the following content:

    import org.specs2.mutable._

    class ProductSpec extends Specification {

      "The 'product' string" should {
        "contain seven characters" in {
          "product" must have size(7)
        }
      }
    }

Run the first spec using Activator by running the command test-only ProductSpec:

    $ activator
    [info] Loading project definition from /private/tmp/foo_scala/project
    [info] Set current project to foo_scala (in build file:/private/tmp/foo_scala/)
    [foo_scala] $ test-only ProductSpec
    [info] ProductSpec
    [info]
    [info] The 'product' string should
    [info] + contain seven characters
    [info]
    [info] Total for specification ProductSpec
    [info] Finished in 24 ms
    [info] 1 example, 0 failure, 0 error
    [info] Passed: Total 1, Failed 0, Errors 0, Passed 1
    [success] Total time: 2 s, completed 09 29, 14 12:22:57 PM

How it works...

In this recipe, we created a brand new spec file that will contain our test specifications. We placed this file inside the test/ directory and ran the test using activator with the test-only command. The test command is used to run the test and it displays the results of the test.

Play Framework Cookbook - Second Edition

By : Alexander Reelsen, Giancarlo Inductivo

Play Framework Cookbook - Second Edition

By: Alexander Reelsen, Giancarlo Inductivo

Overview of this book

Related Content you might be interested in

Current Title:

Play Framework Cookbook - Second Edition

Testing with JUnit (Java) and specs2 (Scala)

How to do it...

How it works...