Blog

Introduction to Sencha Touch

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Steve Smith recently looked at jQuery Mobile and Backbone using a simple application that allowed a user to track their daily exercise. I’m going to duplicate his example using Sencha Touch. Sencha Touch is a framework for building mobile applications using HTML5, CSS3, and Javascript.  This example uses the Developer Preview of Sencha Touch 2.0. Here’s what our project looks like. A Sencha Touch application is loaded from an HTML page. The HTML loads CSS and Javascript. Sencha Touch applications…

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Spring 3.1 – Environment Profiles

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Spring 3.1 Environment Profiles Profiles Spring 3.1 now includes support for the long awaited environment aware feature called profiles. Now we can activate profiles in our application, which allows us to define beans by deployment regions, such as “dev”, “qa”, “production”, “cloud”, etc. We also can use this feature for other purposes: defining profiles for performance testing scenarios such as “cached” or “lazyload”. Essential Tokens Spring profiles are enabled using the case insensitive tokens spring.profiles.active or spring_profiles_active. This token can…

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Philly ETE – Speaker Interview, Ken Rimple co-author of Spring Roo in Action

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For our first look at what’s in store for ETE 2012, we talk with our own Ken Rimple, co-author of Spring Roo in Action. Ken is Director of Education Services and is a regular co-host of Chariot’s TechCast – our monthly podcast series focusing on development and training in Spring, Rails, Scala, Hibernate, Maven and other emerging technologies in the field. Q: After last year’s tremendous following and turnout for ETE, people are really expecting this year to raise the…

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Sorting collections with Backbone.js and jQuery Mobile

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In a previous post, I provided a simple example of rendering an HTML list view using Backbone.js and jQuery Mobile. The code from that example ended up rendering a list like this: Notice that the list is presented in the order that came from the JSON. Also, when items are added to the list, they show up at the bottom. While easy, this isn’t the best. In this post, I’ll add sorting to the backbone collection and make a small…

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Introduction to Backbone.js with jQuery Mobile

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If you are working on a JavaScript heavy application (think jQuery Mobile, etc.), you probably will want to look at some JavaScript libraries to help add structure, consistency and convenience to your applications. One of the JavaScript libraries I’ve used lately is Backbone.js. To quote Backbone themselves, it provides “models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing application over a RESTful…

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Spring Roo 1.2.0 released – it's growing up…

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On Saturday, 12/17/11, SpringSource/VMware released version 1.2.0 of Spring Roo, the Spring rapid application development platform, to the public. There are a lot of good changes in this release to make Roo quite palatable to Enterprise developers, such as: Multi-POM projects – now you can create web, service, database, and functional tiers and tie them all together with a parent POM.  You can even scaffold web interfaces based on models from other projects. Scaffolded service support and repository support – now,…

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OpEd: Yammering about Scala, Java, and Winning

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This is an opinion piece that represents the views of the author, and does not represent the official stance of Chariot Solutions. But sometimes it is fun to weigh in on the news of the day. There has been quite a dust up in the blogosphere about Yammer’s decision to switch from using Scala to Java. Google “yammer switching to scala” and you’ll get a sampling. You can read it for yourself, but the gist of story seems to be…

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Groovy Algorithms: Shunting Yard

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Groovy’s sugary syntax makes coding algorithms — dare I say it — fun.  The shunting yard algorithm, invented by Dutch computer scientist Edsger Dijkstra, is used to parse mathematical expressions.  You might have picked up on this already, but computers and people think differently.  We commonly use infix notation to write mathematical expressions.  It is what you learned in school.  For example: “3 * (2 + 3)”.  Makes sense to you, but it is inefficient for a computer to process. …

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Spring Roo 1.2 will be tipping point for RAD Java

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I’m going to make a bold statement: Spring Roo is about to do for Spring developers what Ruby on Rails did for Ruby developers – make developer agility, and not mechanical, rigid architectural structures, the focus of daily developer productivity. There. I’ve said it. But I have to step back for a minute and disclaim a few things. First, as some of you may know I’ve been working with Spring and Spring-related projects for a while. I’m also the education…

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Akka Scheduler: Actors with Heartbeats

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Akka is an excellent platform for writing concurrent applications using the Actor model. Chariot architect Anatoly Polinsky describes the Akka scheduler and how you can use it to create a heartbeat for an actor. From Anatoly’s blog: AKKA Scheduler: Sending Message to Actor’s Self on Start Akka has a little scheduler written using actors. This can be convenient if you want to schedule some periodic task for maintenance or similar. It allows you to register a message that you want…

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