JEE6, EJB and Glassfish diaries

Some notes while trying to get up on speed with Glassfish and JEE6, mainly about what can go wrong... and there is plenty of it. The most time-consuming activity is researching generic stack traces which hardly ever point to the real cause. NullPointerException when deploying Been there, done that: A beans.xml in META-INF might cause … Continue reading JEE6, EJB and Glassfish diaries →

Solving the 8 Queens puzzle with bit operations

The 8 queens puzzle is a classic (and quite fun to solve) toy problem: place eight queens on a chess board in such a way that all queens could fully move without being obstructed by any other queen. While without practical applications, it illustrates a number of aspects of designing algorithms and implementing programmes: - … Continue reading Solving the 8 Queens puzzle with bit operations →

The jsp-file directive

The jsp-file directive in web.xml allows mapping of JSPs to concrete URLs: <servlet> <servlet-name>My Hidden Page</servlet-name> <jsp-file>/mydir/foo.jsp</jsp-file> </servlet> <servlet-mapping> <servlet-name>My Hidden Page</servlet-name> <url-pattern>/hidden</url-pattern> </servlet-mapping> Shame on me, I didn't know about this. As seen here: http://mail-archives.apache.org/mod_mbox/tomcat-users/200107.mbox/%3CPine.BSF.4.21.0107271807540.7976-100000@localhost%3E

Ensuring JUnit test suite contains all tests

While cleaning up today one of my projects I found a JUnit test that was not part of a test suite and never was executed. 'Never again' I say and here is how: a test suite that scans base packages for tests. The particular code: Is tailored to the specific project's needs Compares the tests … Continue reading Ensuring JUnit test suite contains all tests →

A better eq() when matching method arguments with Mockito

I learned late of Mockito [1], even so more I love it. Walking a little farther away from the basics, a frequent needs presents itself to match method parameters (either when specifying or verifying behaviour) based on properties of complex objects which do not implement the java equals contract. Such an example would be verifying … Continue reading A better eq() when matching method arguments with Mockito →