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Tag Archives: Play Framework

Play 2 – modules, plugins, what’s the difference?

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There seems to be some confusion regarding Play 2 modules and plugins. I imagine this is because the two are often synonymous. In Play (both versions – 1 and 2) there are distinct differences. In this post, I’m going to look at what a plugin is, how to implement one in Java and Scala, and how to import plugins from ...

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Troubleshooting Play Framework 2 apps on Openshift

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Troubleshooting Openshift   With the do-it-yourself application type you really get a lot of freedom to support almost any framework or server that can be built and run on a linux box. But you do have to make your homework, and do some research.  So in this article I’ll show you a couple of tips I learnt playing around with ...

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Publishing Play 2 modules on github

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Now you’ve doubtless followed my earlier guides on writing modules for Play 2, I imagine you’re keen to show your coding chops to the world. The problem is – and this is quite a big one, I’m afraid – there is no place to publish your modules to. When I first starting writing Play modules, the repository was already set-up ...

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Deploy Play Framework 2 apps to Openshift with Java AND Scala

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A couple of weeks, Mark Atwood, Jorge Aliss, and me, Sebastián Scarano participated in Red Hat’s webinar LET’S PLAY! IN THE CLOUD: DEVELOPING JAVA WEB APPS ON OPENSHIFT In the webinar Mark gave a neat introduction to Openshift, Red Hat’s free Platform as a Service: Then we developed a basic contact manager web application, combining Java and Scala source code ...

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Binary websockets with Play 2.0 and Scala

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In a recent article I showed how you can use webrtc, canvas and websockets together to create a face detection application whose frontend runs completely in the browser, without the need for plugins. In that article I used a Jetty based backend to handle the image analysis using OpenCV through the JavaCV wrapper. When I almost finished the article, I ...

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Writing modules for Play 2, part 2: Interceptors

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In the first part of this tutorial, we looked at the bare basics for creating, publishing and calling a module. The module we created didn’t really do much, so now it’s time to look at expaning the functionality using some of Play’s features. 1. Interceptors Interceptors allow you to intercept calls to controllers, and augment or block their behaviour. In ...

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Connect to RabbitMQ (AMQP) using Scala, Play and Akka

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In this article we’ll look at how you can connect from Scala to RabbitMQ so you can support the AMQP protocol from your applications. In this example I’ll use the Play Framework 2.0 as container (for more info on this see my other article on this subject) to run the application in, since Play makes developing with Scala a lot ...

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Writing modules for Play 2, part 1: Get something working

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A couple of weeks ago, I migrated the Play! framework 1.x version of Deadbolt to the Play 2 platform, and was surprised at the lack of information on creating modules. This topic was covered in detail in the Play 1.x docs, and this made creating modules very simple. Clearly, something needed to be done – and so this is the ...

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The all-new Play Module Repository

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Back in November, I spoke to Nicolas Leroux of the Play framework about creating a module repository. He agreed it would be a good idea, but lack of time has prevented me from starting this. Following the stormy events of last week in the Play Google Group, I’ve decided to prioritise it. A working prototype should be available in a ...

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