While it almost certainly remains the largest Ruby on Rails based site in the world, Twitter has gradually been moving more and more of its stack to the JVM. Last year the company announced that its back-end message queue had been re-written in Scala, and more recently it moved the search stack to Java, making Twitter search around three times faster.
Citing a need to be able to respond faster to events, and disappointment in the feature set and timeframe for Java 7, the team behind guardian.co.uk is using Scala as an alternative to Java for their new projects. InfoQ spoke to Web Platform Development Team Lead Graham Tackley about their current stack, the reasons behind the move, and the experience of using Scala in large-scale development.
On September 29th LinkedIn Signal was announced, providing a social search application both for LinkedIn shares and tweets from LinkedIn-Twitter bounded accounts. This article aims to provide more insight into the motivation and technical challenges of combining Scala, JRuby and Voldemort, at such scale.
Scala and Spring are a promising match. Based on a concrete example, this article shows how the power of Scala combined with the proven and productive Spring framework can be unleashed. 5