Would you ever guess that this line could lead to a constraint-validation exception during a batch update or delete and re-insert rows (loosing all columns Hibernate does not know about)? I was quite surprised. In particular buyer’s bonusCards get deleted and re-inserted, because Hibernate believes that the collection of cards is dirty, even though itContinue reading “Framework Joy: Load in Hibernate Updates Data”
Since JBoss EAP 6.1 / AS 7.2.0 is modular and you can exclude what modules are visible to your webapp, you would expect it to be easy to ignore the built-in implementation of JAX-RS (Rest Easy 2.3.6) and use a custom one (3.0.6). However, sadly, this is not the case. You are stuck with whatContinue reading “JBoss Modules Suck, It’s Impossible To Use Custom Resteasy/JAX-RS Under JBoss 7”
A short story about the complexity of magical frameworks and dependency injection with a happy ending, featuring Resteasy, CDI, and JBoss. Once upon time, I have created a JAX-RS webservice that needed to supply data to a user’s session. I wanted to be fancy and thus created a @Singleton class for the exchange of informationContinue reading “How I Learned to Avoid Magical Dependency Injection And Love Plain Java”
Real World Java EE Night Hacks – Dissecting the Business Tier, Adam Bien, 2011, ISBN 9780557078325. I highly recommend this very thin and down-to-the-earth-practical book to everybody interested in back-end Java (a basic knowledge of servlets, Java ORM, and REST might be useful). The book evolves around a small but realistic project (X-Ray), which weContinue reading “Recommended Book: Real World Java EE Night Hacks by Adam Bien”
JBoss AS 7 is neat but the documentation is still quite lacking (and error messages not as useful as they could be). This post summarizes how you can create your own JavaEE-compliant login module for authenticating users of your webapp deployed on JBoss AS. A working elementary username-password module provided.
I needed a quick and simple way to enable some users to query a table and figured out that the easiest solution was to use an embedded, ligthweight HTTP server so that the users could type a URL in their browser and get the results. The question was, of course, which server is best forContinue reading “Exposing Functionality Over HTTP with Groovy and Ultra-Lightweight HTTP Servers”
Recommended Readings List of open source projects at Twitter including e.g. their scala_school – Lessons in the Fundamentals of Scala and effectivescala – Twitter’s Effective Scala Guide M. Fowler & P. Sadalage: Introduction into NoSQL and Polyglot Persistence (pdf, 11 slides) – what RDBMS offer and why it sometimes isn’t enough, what the different NoSQLContinue reading “Most interesting links of February ’12”
I’ve released version 0.9.9 of Static JSF EL Expression Validator (tool to check that EL expressions in JSF pages use only existing beans and properties), available for download from Maven Central. The main addition since the last version is the ability to detect managed beans based on annotations instead of reading them from faces-confix.xml orContinue reading “Release 0.9.9 of Static JSF EL Expression Validator with Annotated Beans Autodetection”
Recommended Readings Recommended Reading by Poppendiecks – an excellent selection, starting with Lean from Trenches, Management 3.0, Specification by Example, The Lean Startup etc. Eric Allman says that Programming Isn’t Fun Any More because problem solving has been replaced with learning, configuring, and integrating tons of libraries, frameworks, and tools and many people agree withContinue reading “Most interesting links of November”
I was unsuccessfuly looking for some decent, neither too simple nor to complex Java web application for Iterate hackaton “War of Web Frameworks”. I want to record the demo apps and options I’ve found in the case I’ll need it ever again. Tips are welcome.