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Play 2.0 for Java developers

The Java API for the Play 2.0 application developers is available in the play package.

The API available in the play.api package (such as play.api.mvc) is reserved for Scala developers. As a Java developer, look at play.mvc.

Main concepts

• Basic HTTP programming
  • Actions and Controllers
  • HTTP routing
  • Session and Flash scopes
  • Body parsers
  • Action composition
• Asynchronous HTTP programming
  • Handling asynchronous results
  • Streaming responses
  • Comet sockets
  • WebSockets
• The template engine
  • Scala templates syntax
  • Common use cases
• HTTP form submission and validation
  • Form definitions
  • Writing custom constraints
  • Using the form template helpers
• Working with Json
  • The Play Json library
  • Handling and serving Json requests
• Working with XML
  • Handling and serving XML requests
• Handling file upload
  • Direct upload and multipart/form-data
• Accessing an SQL database
  • Configuring and using JDBC
  • Using EBean as ORM
  • Using JPA as ORM
• Using the Cache
  • The Play cache API
  • Caching HTTP responses
• Calling WebServices
  • The Play WS API
• Integrating with Akka
  • Setting up Actors
  • Scheduling asynchronous tasks
• The application Global object
  • Hooking the application lifecycle
  • Special requests handling
  • Customizing error pages
• Testing your application
  • Writing unit tests
  • Writing functional tests

Advanced topics

• Writing a Play plugin
  • The play.Plugin API
• Custom controllers instances
  • Handling controller object creation yourself
  • Integrating with Spring

Tutorials

• The Hello World tutorial