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Akka Notes – ActorSystem (Configuration and Scheduling) – 4

As we saw from our previous posts, we could create an Actor using the actorOf method of the ActorSystem. There’s actually much more you could do with ActorSystem. We’ll touch upon just the Configuration and the Scheduling bit in this write-up. Let’s look at the subsets of methods available in the ActorSystem.             1. Configuration ...

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MongoDB Incremental Migration Scripts

Introduction An incremental software development process requires an incremental database migration strategy. I remember working on an enterprise application where the hibernate.hbm2ddl.auto was the default data migration tool. Updating the production environment required intensive preparation and the migration scripts were only created on-the-spot. An unforeseen error could have led production data corruption. Incremental updates to the rescue The incremental database ...

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Java EE 7 Batch Processing and World of Warcraft – Part 1

java-interview-questions-answers

This was one of my sessions at the last JavaOne. This post is going to expand the subject and look into a real application using the Batch JSR-352 API. This application integrates with the MMORPG World of Warcraft. Since the JSR-352 is a new specification in the Java EE world, I think that many people don’t know how to use ...

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The Cloud Winners and Losers?

The cloud is revolutionising IT. However there are two sides to every story: the winners and the losers. Who are they going to be and why? If you can’t wait here are the losers: HP, Oracle, Dell, SAP, RedHat, Infosys, VMWare, EMC, Cisco, etc. Survivors: IBM, Accenture, Intel, Apple, etc. Winners: Amazon, Salesforce, Google, CSC, Workday, Canonical, Metaswitch, Microsoft, ARM, ...

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Easy REST endpoints with Apache Camel 2.14

Apache Camel has a new release recently, and some of the new features were blogged about by my colleague Claus Ibsen. You really should check out his blog entry and dig into more detail, but one of the features I was looking forward to trying was the new REST DSL. So what is this new DSL? Actually, it’s an extension ...

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Validate Configuration on Startup

Do you remember that time when you spent a whole day trying to fix a problem, only to realize that you have mistyped a configuration setting? Yes. And it was not just one time. Avoiding that is not trivial, as not only you, but also the frameworks that you use should take care. But let me outline my suggestion. Always ...

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Java Minor Releases Scheme Tweaked Again

In 2013, Oracle announced the Java SE – Change in Version Numbering Scheme. The announcement stated that Limited Update releases (those “that include new functionality and non-security fixes”) and Critical Patch Updates (CPUs) [those “that only include fixes for security vulnerabilities”] would be released with specific version number schemes. In particular, Limited Use Releases would have version numbers with multiples ...

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How to use Hibernate to generate a DDL script from your Play! Framework project

Ok, so you have been using the hiber­nate prop­erty name=“hibernate.hbm2ddl.auto” value=“update” to con­tin­u­ously update your data­base schema, but now you need a com­plete DDL script? Use this method from you Global Class onStart to export the DDL scripts.  Just give it the pack­age name (with path) of your Enti­ties as well as a file name: public void onStart(Application app) { exportDatabaseSchema("models", ...

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Eclipse Extension Point Evaluation Made Easy

Coding Eclipse Extension Point evaluations comes in a bit verbose and sparsely self-explaining. As I got round to busy myself with this topic recently, I wrote a little helper with the intent to reduce boilerplate code for common programming steps, while increasing development guidance and readability at the same time. It turned out to be not that easy to find ...

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