Browse Library
Sign In Start Free Trial
Close icon Search icon
Account
Browse Library Advanced Search Sign In Start Free Trial

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Play Framework essentials
  • Table Of Contents Toc
  • Feedback & Rating feedback
Play Framework essentials

Play Framework essentials

By : Julien Richard-Foy
3.6 (8)
Buy this Book
close
close
Play Framework essentials

Play Framework essentials

3.6 (8)
By: Julien Richard-Foy
Buy this Book

Overview of this book

This book targets Java and Scala developers who already have some experience in web development and who want to master Play framework quickly and efficiently. This book assumes you have a good level of knowledge and understanding of efficient Java and Scala code.
Table of Contents (9 chapters)
close
close
close
Preface
Icon
Preface
Icon
What this book covers
Icon
What you need for this book
Icon
Who this book is for
Icon
Conventions
Icon
Reader feedback
Icon
Customer support
Lock Free Chapter
1
1. Building a Web Service
Icon
1. Building a Web Service
Icon
Play – a framework used to write web applications
Icon
Bootstrapping a Play application
Icon
URL routing
Icon
Building HTTP responses
Icon
Reading JSON requests
Icon
Summary
2
2. Persisting Data and Testing
chevron up
Icon
2. Persisting Data and Testing
Icon
Testing your web service
Icon
Persisting data
Icon
Using an in-memory database for tests
Icon
Summary
3
3. Turning a Web Service into a Web Application
Icon
3. Turning a Web Service into a Web Application
Icon
Delta between a web service and a web application
Icon
Using the template engine to build web pages
Icon
Generating HTML forms
Icon
Reading and validating HTML form data
Icon
Handling content negotiation
Icon
Putting things together
Icon
Writing web user interface tests
Icon
Summary
4
4. Integrating with Client-side Technologies
Icon
4. Integrating with Client-side Technologies
Icon
Philosophy of Play regarding client-side technologies
Icon
Serving static assets
Icon
Using the JavaScript reverse router
Icon
Managing assets from the build system
Icon
Summary
5
5. Reactively Handling Long-running Requests
Icon
5. Reactively Handling Long-running Requests
Icon
Play application's execution model
Icon
Scaling up your server
Icon
Embracing non-blocking APIs
Icon
Managing execution contexts
Icon
Writing incremental computations using iteratees
Icon
Streaming results using enumerators
Icon
Manipulating data streams by combining iteratees, enumerators, and enumeratees
Icon
Controlling the data flow
Icon
Summary
6
6. Leveraging the Play Stack – Security, Internationalization, Cache, and the HTTP Client
Icon
6. Leveraging the Play Stack – Security, Internationalization, Cache, and the HTTP Client
Icon
Handling security concerns
Icon
Saving computation time using cache
Icon
Serving content in several languages
Icon
Calling remote web services
Icon
Summary
7
7. Scaling Your Codebase and Deploying Your Application
Icon
7. Scaling Your Codebase and Deploying Your Application
Icon
Making an action's logic reusable and composable with action builders
Icon
Modularizing your code
Icon
Application deployment
Icon
Summary
8
Index
Icon
Index

Using an in-memory database for tests

You now have all the required knowledge to make your web service persistent. Once you have chosen a database technology, select the Play plugins you need (JDBC, JPA, and so on), configure your data sources right from your application.conf file, use the database helper classes provided by the plugins to integrate with your database technology, and finally implement your business layer on top of your database layer.

Once you have made your business layer persistent, you probably want to run your tests to check whether you introduced a regression. However, you will unexpectedly get the following error:

[info] A Shop should
[info] ! add items
[error]    RuntimeException: : There is no started application  (Play.scala:71)

What happened? Remember that your database configuration is read by your Play application at startup and then used by your database layer. The key step is when you retrieve the data source—remember that the method takes an implicit...

Visually different images
CONTINUE READING
83
Tech Concepts
36
Programming languages
73
Tech Tools
Icon Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.
Icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Icon 50+ new titles added per month and exclusive early access to books as they are being written.
Play Framework essentials
End of Section 2
Next Section
notes
bookmark Notes and Bookmarks search Search in title playlist Add to playlist font-size Font size

Change the font size

margin-width Margin width

Change margin width

day-mode Day/Sepia/Night Modes

Change background colour

Close icon Search
Country selected
Close icon Your notes and bookmarks

Confirmation

Modal Close icon
claim successful
Order Page Read Now

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY

Submit Your Feedback

Modal Close icon
Modal Close icon
Modal Close icon