§Sample applications

The Play 2.0 package comes with a comprehensive set of sample applications written in both Java and Scala. This is a very good place to look for code snippets and examples.

The sample applications are available in the samples/ directory of your Play installation.

§Hello world

This is a very basic application that demonstrates Play 2.0 fundamentals:

• Writing controllers and actions.
• Routing and reverse routing.
• Linking to public assets.
• Using the template engine.
• Handling forms with validation.

§Computer database

This is a classic CRUD application, backed by a JDBC database. It demonstrates:

• accessing a JDBC database, using Ebean in Java and Anorm in Scala
• table pagination and CRUD forms
• integrating with a CSS framework (Twitter Bootstrap ).

Twitter Bootstrap requires a different form layout to the default layout provided by the Play 2.0 form helper, so this application also provides an example of integrating a custom form input constructor.

§Forms

This is a dummy application presenting several typical form usages. It demonstrates:

• writing complex forms with validation
• handling forms with dynamically repeated values.

§ZenTasks

This advanced todo list demonstrates a modern Ajax-based web application. This is a work in progress, and we plan to add features in the future releases. For now you can check it out to learn how to:

• integrate authentication and security
• use Ajax and JavaScript reverse routing
• integrate with compiled assets - LESS CSS and CoffeeScript.

§CometClock

This a very simple Comet demonstration pushing clock events from the server to the Web browser using a the forever-frame technique. It demonstrates how to:

• create a Comet connection
• use Akka actors (in the Java version)
• write custom Enumerators (in the Scala version).

§WebSocket chat

This application is a chat room, built using WebSockets. Additionally, there is a bot used that talks in the same chat room. It demonstrates:

• WebSocket connections
• advanced Akka usage.

§Comet monitoring

This mobile web application monitors Play server performance. It demonstrates:

• advanced usage of Enumerators and Enumeratees.

Next:

– Play 2.0 for Scala developers
– Play 2.0 for Java developers