Andrej Koelewijn

In the past I used JAD to decompile java classes, but it hasn’t been updated to current java versions. So i tried the alternative suggested on the JAD wiki page: JD – Java Decompiler. It’s pretty nice: you can use the GUI to view the source code, navigate around with hyperlinks, search. You can also [...]

I’m running ServiceMix on a machine which doesn’t have internet access, so installing and upgrading features is a bit hard. You can, however, install features from an internal maven repository like Nexus. This post explains how you can configure which maven repositories should be used by ServiceMix.
The OSGI implementation of ServiceMix (Apache Felix/Karaf) has a [...]

Apache ServiceMix 4.2 includes Apache Camel 2.2.0. The following steps outline how you can add Apache Camel 2.3.0 in the same ServiceMix instance. This example uses the versions as released by Progress Fuse.
Go to the ServiceMix console, either by starting servicemix, or by ssh-ing into ServiceMix. To install Camel 2.3 we need to add a [...]

The following example illustrates how you can implement a composite service using Apache Camel. The service is exposed as a REST resource, and it uses two other resources to collect the data required.
The composite service will enable a client to get info on a customer and it’s orders. To get this data the composite service [...]

Nexus is a maven repository manager. You can use Nexus to host your own maven repository for artifact created in your company, or for caching external artifacts.
Getting started with Nexus is pretty easy. Download the application. The package contains a webserver, so you don’t have to have a java container running. Simply unpack the [...]

If you are just starting out with JEE CDI (Weld), it’s easy to forget the required beans.xml file. If you don’t include it, you may run into problems like this:

SEVERE: javax.el.PropertyNotFoundException: /index.xhtml @8,67 action="#{crm.ping}": Target Unreachable, identifier ‘crm’ resolved to null
javax.faces.el.EvaluationException: javax.el.PropertyNotFoundException: /index.xhtml @8,67 action="#{crm.ping}": Target Unreachable, identifier ‘crm’ resolved to null
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:95)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
…

The [...]

I ran into the following problem yesterday while building a rest service using resteasy: the code would compile ok, but the unit tests wouldn’t run. I got the following exception in the output of the unit tests:

java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/ws/rs/ext/RuntimeDelegate
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at [...]

I did a small proof of concept yesterday: a wicket web application using embedded Mule to connect to some services. Problem is that it had to run on OC4J 10.1.3.4.0 with Java 5. Got it running pretty fast, some tips:

Oracle’s xml parser didn’t like some of Mule’s xsd files. You can solve this by [...]

I created a normal mule project using the maven archetype, eg:

mvn mule-project-archetype:create -DgroupId=nl.iteye -DartifactId=mule-tests -DmuleVersion=2.2.1 -Dinteractive=false

Strangely, i got some missing dependencies on this project. The maven output shows me the following:

[INFO] Unable to find resource ‘org.safehaus.jug:jug:pom:2.0.0-osgi’ in repository central (http://central)
[INFO] Unable to find resource ‘org.apache.santuario:xmlsec:pom:1.4.0′ in repository central (http://central)
[INFO] Unable to find resource ‘javax.script:groovy-engine:pom:1.1-osgi’ in [...]

VMWare just bought SpringSource. Looks to me like they are going to compete with Google Apps Engine: offer a java based cloud platform as a service.
This is probably good news for everybody who is using the free and open source versions of spring and grails. My thinking is that VMWare will use the free [...]