Best of this Week Summary 19 April - 25 April 2010

• An introduction to Gizzard, an open sourced sharding framework (store data across multiple computers instead of on just one) which is used by Twitter.
  


• A hands-on tutorial of creating a Spring application that uses Hibernate as JPA provider and JTA for transaction demarcation. A simple Order Processing Message Driven Bean is implemented that showcases this integration. It is deployed on a WebLogic 10.3 server.
  


• Last week Jira from the Apache Foundation was compromised. Here's a description of how the hackers gained access via XSS.