Esper: Event Stream Processing and Correlation   08 Mar 2007 05:00 GMT
Event-driven architectures turn a traditional data-driven application's architecture upside-down. Instead of storing the data and running queries against stored data, Esper allows applications to store queries and run the data through. This article introduces Esper, a lightweight event processing kernel written in Java.
Source: O'Reilly

Role-Based Code Upgrade   08 Mar 2007 05:00 GMT
When you upgrade one feature that will only be used by a small set of users, why should you have to update the entire application for all your users? Stephen B. Morris proposes a model of updating just what's needed, and only for who needs it.
Source: Java.net

Image I/O Utilities Grab Bag   06 Mar 2007 05:00 GMT
Sometimes what you need is not an enormous framework, but a grab bag of bite-size morsels. That's what Jeff Friesen has in this article, which offers three commonly needed graphic conveniences, implemented with the Image I/O package.
Source: Java.net

Using the FOP-to-AWT Viewer   05 Mar 2007 23:45 GMT
When you want to use the FOP-to-AWT Viewer from a Java application, you can use the ExampleAWTViewer.java.
Source: DevX

Persistence Pays Offs: Advanced Mapping with JPA   05 Mar 2007 21:07 GMT
In this follow-up to an earlier article on the Java Persistence API, learn how to use JPA to map inheritance, one-to-many, and many-to-many relationships. And learn to use the query language (JPQL) to query concrete and abstract classes.
Source: DevX

Statement, Branch, and Path Coverage Testing in Java   02 Mar 2007 05:00 GMT
Even with unit tests approaching 100% coverage, critical logic errors could be hiding in your code. It is impossible to test every possible condition, but with a little analysis of the potential paths and a plan to test them, you can be much more confident in the quality of your tests.
Source: O'Reilly

Loading an XSL Stylesheet into a Java Application   02 Mar 2007 01:32 GMT
One easy way to load an XSL stylesheet into a Java application is to use the TransformerFactory.getAssociatedStylesheet method
Source: DevX

Building Web Applications with Maven 2   01 Mar 2007 05:00 GMT
Ant is the default for many web application developers, but Will Iverson makes the case that using Maven 2 can save you a lot of time and hassle through its approach of sensible defaults. In this article, he introduces core Maven 2 concepts and then shows you how easy it is to develop a web app with Maven 2.
Source: Java.net