Matt RaibleMatt Raible is a Web Developer and Java Champion. Connect with him on LinkedIn.

The Angular Mini-Book The Angular Mini-Book is a guide to getting started with Angular. You'll learn how to develop a bare-bones application, test it, and deploy it. Then you'll move on to adding Bootstrap, Angular Material, continuous integration, and authentication.

Spring Boot is a popular framework for building REST APIs. You'll learn how to integrate Angular with Spring Boot and use security best practices like HTTPS and a content security policy.

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The JHipster Mini-Book The JHipster Mini-Book is a guide to getting started with hip technologies today: Angular, Bootstrap, and Spring Boot. All of these frameworks are wrapped up in an easy-to-use project called JHipster.

This book shows you how to build an app with JHipster, and guides you through the plethora of tools, techniques and options you can use. Furthermore, it explains the UI and API building blocks so you understand the underpinnings of your great application.

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Over 10 years ago, I wrote my first blog post. Since then, I've authored books, had kids, traveled the world, found Trish and blogged about it all.

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Posted in General at Sep 17 2008, 12:48:52 PM MDT 2 Comments

Upgrading Hibernate to 3.4.0 and AppFuse for Tapestry 5

Last night I spent an hour upgrading AppFuse to Hibernate 3.4.0.GA. I tried the same thing a week ago, but failed miserably. When Hibernate Core Modules (3.3) (a Maven dependency howto) showed up on the Hibernate blog, I was re-inspired. I discovered some interesting things along the way (at least in my setup).

You need to use JBoss's Maven Repository
The latest Hibernate releases aren't in the central Maven repo yet. If they're not in there two weeks after the release, I doubt they'll be there anytime soon. Best to plan on adding as a permanent repository. As a bonus, you can remove since JTA is in JBoss's repo.

Javassist is not an optional dependency
If I remove the Javassist dependency, here's the error I get:

java.lang.NoClassDefFoundError: javassist/util/proxy/MethodFilter

Seems reasonable right? What if I add in the dependency on Hibernate's cglib instead?

java.lang.NoClassDefFoundError: javassist/util/proxy/MethodFilter

OK, so apparently you can't switch between Javassist and hibernate-cglib-repack as stated in Hibernate's Maven dependency howto. Of course, I do believe their instructions are correct, they just don't work in my setup. Versions I'm using: hibernate-core-3.3.1.GA and hibernate-annotations-3.4.0.GA.

Not including SLF4J is a bad idea
If you don't include a dependency on SLF4J (and you're using Spring), you get a nice cryptic error message.

Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class 
Constructor threw exception; nested exception is java.lang.NoClassDefFoundError
        at org.springframework.beans.BeanUtils.instantiateClass(
        ... 48 more
Caused by: java.lang.NoClassDefFoundError
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(
        at org.springframework.orm.hibernate3.LocalSessionFactoryBean.class$(
        at org.springframework.orm.hibernate3.LocalSessionFactoryBean.(
        at org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean.(
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(
        at java.lang.reflect.Constructor.newInstance(
        at org.springframework.beans.BeanUtils.instantiateClass(

Hibernate's JPA now uses PersistenceException instead of EntityExistsException
In previous releases, Hibernate's ConstraintViolationException was wrapped in a javax.persistence.EntityExistsException. In Hibernate's EntityManager 3.4.0.GA, it's wrapped in a javax.persistence.PersistenceException.

Of course, these errors could be caused by Spring or Maven, but my hunch is they're more related to Hibernate and it's new more modular dependencies. You can view the full changeset for upgrading Hibernate to 3.3.1.GA via FishEye.

Tapestry 5 version of AppFuse
In other AppFuse-related news, Serge Eby has created a Tapestry 5 version of AppFuse. You can see his alpha-level work in Google Code's tapestry5-appfuse project. I haven't had a chance to take a look at Serge's work yet, but I'm eager to do so. Hopefully we can get it back into the main project sooner than later. As far as Wicket and Stripes support, I haven't forgot about those - just having trouble finding the time and motivation to do the work.

Posted in Java at Sep 17 2008, 09:35:45 AM MDT 12 Comments