Book Image

Play Framework Cookbook

By : Alexander Reelsen
Book Image

Play Framework Cookbook

By: Alexander Reelsen

Overview of this book

<p>The Play framework is the new kid on the block of Java frameworks. By breaking with existing standards the play framework tries not to abstract away from HTTP as most web frameworks do, but tightly integrates with it. This means quite a shift for Java programmers. Understanding these concepts behind the play framework and its impact on web development with Java are crucial for fast development of applications.<br /><br />The Play Framework Cookbook starts where the beginner documentation ends. It shows you how to utilize advanced features of the Play framework &ndash; piece by piece and completely outlined with working applications!<br /><br />The reader will be taken through all layers of the Play Framework and provided with in-depth knowledge from as many examples and applications as possible. Leveraging the most from the Play framework means to think simple again in a java environment. Implement your own renderers, integrate tightly with HTTP, use existing code, improve site performance with caching and integrate with other web services and interfaces. Learn about non-functional issues like modularity or integration into production and testing environments. In order to provide the best learning experience during reading Play Framework Cookbook, almost every example is provided with source code, so you can start immediately to integrate recipes into your own play applications.</p>
Table of Contents (16 chapters)
Play Framework Cookbook
Credits
Foreword
About the Author
About the Reviewers
www.PacktPub.com
Preface
Further Information About the Play Framework
Index

Integrating with messaging queues


As soon as your system and application landscape widens, you try to create components which are independent of each other. One of the first steps is to create an asynchronous messaging architecture. This allows decoupling of components, but more importantly, you can also be implementation-independent by simply using standards of data exchange. There exist messaging standards such as AMQP or STOMP, which can be read by any application. The most well known, defined API for messaging in the Java world is JMS, the Java Message Service.

In this example Apache ActiveMQ will be used to let an arbitrary amount of Play instances communicate with each other. The communication will be done via a publish-subscribe mechanism which is called a topic in JMS terms. In order to get a short overview, there are two mechanisms, which could be chosen for this task. First a producer-consumer pattern, second a publish-subscribe pattern. The producer-consumer pattern however requires...