In April 2008 Google launched its public Platform-as-a-Service (PaaS) cloud computing infrastructure called App Engine (GAE). Initially only supporting Python, GAE later added support for Java, Ruby on Rails, Clojure and Scala, as reported by cloudcomputing.info in August last year.
Now Google announced version 1.5.0. at its annual I/O conference in San Fransico. The new version introduces backends for Java and Python which are developer-controlled, long-running, addressable sets of instances which are as large as the developer specifies. Improvements concerning the Task Queues by introducing Pull Queues which allow developers to pull tasks, instead of relying on pull from a queue as applications are ready to proces them.
Also support for the Go programming language, a open source, statically typed compiled language is introduced, and High Replication Datastore is now provided as the default configuration.