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

Working with controllers and routes

Play applications use controllers to handle HTTP requests and responses. Play controllers are composed of actions that have specific functionality. Play applications use a router to map HTTP requests to controller actions.

How to do it...

To create a new page, which prints out "Hello World" for a Play Java project, we need to take the following steps:

Run the foo_java application with Hot-Reloading enabled:
```
    $ activator "~run"
```

Edit foo_java/app/controllers/Application.java by adding the following action:

    public static Result hello() {
      return ok("Hello World");
    }

Edit foo_java/conf/routes by adding the following line:

    GET    /hello    controllers.Application.hello()

View your new hello page using a web browser:
```
http://localhost:9000/hello
```

For Scala, we need to take the following steps:

Run the foo_scala application with Hot-Reloading enabled:
```
    $ activator "~run"
```
Edit foo_scala/app/controllers/Application.scala by adding the following action:
```
    def hello = Action {
      Ok("Hello World")
    }
```

Edit foo_scala/conf/routes by adding the following line:

    GET    /hello    controllers.Application.hello

View your new hello page using a web browser:
```
http://localhost:9000/hello
```

How it works…

In this recipe, we enumerated the steps necessary to create a new accessible page by creating a new web action in a controller and defined this new page's URL route by adding a new entry to the conf/routes file. We should now have a "Hello World" page, and all without having to reload the application server.

Play Framework Cookbook - Second Edition

By : Alexander Reelsen, Giancarlo Inductivo

Play Framework Cookbook - Second Edition

By: Alexander Reelsen, Giancarlo Inductivo

Overview of this book

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Current Title:

Play Framework Cookbook - Second Edition

Working with controllers and routes

How to do it...

How it works…