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Julian Jewel

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Top Stories by Julian Jewel

java.lang.IncompatibleClassChangeError: class org.hibernate.cfg.ExtendedMappings has interface org.hibernate.cfg.Mappings as super class

We had this new error from Hiberante – “java.lang.IncompatibleClassChangeError: class org.hibernate.cfg.ExtendedMappings has interface org.hibernate.cfg.Mappings as super class” – This is due to using the older hibernate entity manager/annotations libraries that were around when we upgraded to the newer 3.5.x version of hibernate. Hibernate includes the entity manager and annotations as part of the hibernate core library. ... (more)

Echo3 HelloWorld

Java Developer's Magazine Here’s a Echo3 application in 3 steps - 1) Create HelloWorld.java public class HelloWorld extends ApplicationInstance { public Window init() { Window window = new Window(); ContentPane contentPane = new ContentPane(); window.setContent(contentPane); Label label = new Label("Hello, world!"); contentPane.add(label); return window; } } 2) Create the HelloWorldServlet public class HelloWorldServlet extends WebContainerServlet { @Override public ApplicationInstance newApplicationInstance() { return new HelloWorld(); } } 3) Change web.xml Hell... (more)

97 Things Every Software Architect Should Know

Being an architect is a tough job. The life of an architect is very painful especially taking many suboptimal decisions in the dark. The book “97 Things Every Software Architect Should Know” can really help avoid such costly mistakes. You can get the book at – http://www.amazon.com/Things-Every-Software-Architect-Should/dp/059652269X/ ... (more)

Service Activator & Transaction

Java Developer’s Journal We process about 300 messages / second in our application. The Service Activator pattern has been very helpful to fork off and distribute processing of messages. We fork off messages to a JMS queue for processing. In some cases, the forked off messages need to run inside the same transaction of the caller and JMS helps us achieve this. For more information on Service Activator, refer to http://java.sun.com/blueprints/corej2eepatterns/Patterns/ServiceActivator.html and http://www.eaipatterns.com/MessagingAdapter.html ... (more)

Run WFE Open Source BPMS System

Nice to see some initiative on a open source BPMS. Runa WFE is an OpenSource BPMS system, based on JBoss jBPM core. It is a cross-platform end user solution for business process development and execution. More information at – http://sourceforge.net/projects/runawfe ... (more)