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

Using Ebean (Java) with MySQL

Play Framework 2.x includes an object-relational mapping tool called Ebean for Java-based Play applications. To be able to use Ebean, ensure that Ebean and a suitable MySQL driver are declared as project dependencies in foo_java/build.sbt.

For this recipe, we will be utilizing Ebean with database evolutions. Play Framework 2.x gives developers a way to manage database migrations. Database migrations are useful for tracking schema changes during the course of application development. Database evolutions are enabled by default but can be disabled in conf/application.conf with the following settings:

evolutionplugin=disabled

Evolution scripts are stored in the conf/evolutions/default/ directory. For more information regarding database evolutions, please refer to Play's online documentation at

https://www.playframework.com/documentation/2.3.x/Evolutions.

How to do it...

You need to perform the following steps to utilize Ebean:

Add the Ebean dependency in build.sbt:

    libraryDependencies ++= Seq(
        javaJdbc,   javaEbean,
        "mysql" % "mysql-connector-java" % "5.1.28"
    )

Ensure that Ebean and MySQL are configured properly in conf/application.conf:

    db.default.driver=com.mysql.jdbc.Driver
    db.default.url="jdbc:mysql://<YOUR_MYSQL_HOST>/<YOUR_DB>"
    db.default.user=<YOUR_USER>
    db.default.password=<YOUR_PASSWORD>

    ebean.default="models.*"

For the next recipes, we need to create our product table in our MySQL database. Create our first database evolution file 1.sql in conf/evolutions/default and add the following SQL statements:

  # --- !Ups
    CREATE TABLE Products (
      id INT NOT NULL AUTO_INCREMENT,
      name VARCHAR(100) NOT NULL,
      PRIMARY KEY (id)
    );

  # --- !Downs
    DROP TABLE Products;

The next step is to create the Ebean model for our entity Product:

    package models;

    import java.util.*;
    import javax.persistence.*;
    import play.db.ebean.*;
    import play.data.format.*;
    import play.data.validation.*;

    @Entity
   @Table(name = "Products")
    public class Product extends Model {
      
    @Id
    public Long id;
  
    @Column
    @Constraints.Required
    public String name;

    public static Finder<Long, Product> find = new Finder<Long, Product>(
      Long.class, Product.class
    );

    public Long getId() {
      return id;
    }
    public void setId(Long id) {
      this.id = id;
    }
    public String getName() {
      return name;
    }
    public void setName(String name) {
      this.name = name;
    }
}

The following displays various database-oriented operations using Ebean.

Tip

Downloading the example code

You can download the example code files for all Packt books you have purchased from your account at http://www.packtpub.com. If you purchased this book elsewhere, you can visit http://www.packtpub.com/support and register to have the files e-mailed directly to you.

Creating a record

The following code snippet will create a new record:

Product product = new Product();
      product.name = "Apple iPhone";
      product.save();

Updating a record

The following code snippet will update a record:

   Product forUpdate = Product.find.ref(1L);
      forUpdate.name = "Apple iPhone 6";
      forUpdate.update();Deleting a record:
  Product.find.ref(1L).delete();

Querying a record

The following code snippet will query a record:

  Product p = Product.find.byId(1L);

Retrieving a record

The following code snippet will retrieve a record:

List<Product> products = Product.find.all();

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

Using Ebean (Java) with MySQL

How to do it...

Tip

Creating a record

Updating a record

Querying a record

Retrieving a record