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That's Neat, That's NicePosted by editor on February 14, 2007 at 7:21 AM PST
MPEG finally notices Java It's easy to see when developers choose Java to solve problems for other developers: IDE's, build tools, XML processors, etc. It's a lot more interesting when it gets used for some other purpose, because that proves once again that it fills a need. To this point, I was encouraged to see that MPEG founder and chairman Leonardo Chiariglione has chosen Java to implement his latest project. I'd always wished they'd done the MPEG-4 reference implementation in Java -- late 90's performance concens notwithstanding -- because it would have gotten more developers up and running faster, rather than requiring everyone who wanted to work with it to be Windows-based and be able to read and port Windows code. Adopting Java should be a good way to advance a standard, because far more developers will be willing and able to work with it. In this case, Chiariglione has used Java for the implementation of a standard, open-source DRM system called Chillout. He mentions it in a response to Steve Jobs' recent anti-DRM essay.
Political concerns about DRM notwithstanding, it's encouraging to see the DMP adopt Java for its reference implementation, and let's hope we see MPEG do the same in the future. Also in Java Today, The ever-prolific Kohsuke Kawaguchi has just released NLink, a project to simplify calling native code from Java. "The problem with calling native libraries with JNI is that, for every method, you need to write a java method declaration, and then a bit of native code to do the parameter conversion. This makes it difficult to casually call into native libraries, because you'd have to write another native library just for JNI handling. NLink overcomes this problem by providing a general-purpose method invocation converter driven by annotation." A brief tutorial on using NLink is available in the project's web space. In the InfoQ video interview Mike Keith on EJB 3, co spec lead discusses the state of EJB 3, talks about how the community has driven the development of the EJB 3 spec, and comments on the evolution of the specification to work better with POJO's and embrace newer ideas such as dependency injection. Mark Lam considers the question When is Software faster than Hardware? in today's Weblogs. "We tend to think that execution of code will be faster in hardware than in software. However, this is not always true especially in the case of Java code execution. This article will tell you why." Jean-Francois Arcand reveals the steps involved in Enabling Server Side Include (SSI) in GlassFish: "GlassFish v2 supports Server Side Include (SSI). Come to read how to enable it." Finally, Felipe Leme would like to speak up for a new JDK 7 keyword in Final? Not yet... "Now that the pandora box is open, it is my turn to suggest a (possible worthless) change to the Java language: the semifinal modifier!"
Grab your wiimote, if you have one, and head to today's Forums,
In
Using Gamepads, Joysticks and even the Wiimote with Project Wonderland,
Finally, Drinkwater, GJ describes an off-by-one bug in Table Generator / primary key problem: "I have an application that uses JMS to persist entities to a DB, I am using Glassfish UR1 using table generator for the primary key generator, using the default allocation size as 50. One problem that I had was when an unexpected row in the DB appeared. The table sequence count was say 50, meaning that the application held 51-100 in memory for primary keys, and a row appeared in at 101 unexpectedly. I am not sure how this came about, the application is the only thing using this DB, but I have been testing and restarting the application a lot. When a message was sent to the JMS, when the sequence count was 100, the entity threw a java.sql.SQLException" Current and upcoming Java Events :
Registered users can submit event listings for the java.net Events Page using our events submission form. All submissions go through an editorial review before being posted to the site. Archives and Subscriptions: This blog is delivered weekdays as the Java Today RSS feed. Also, once this page is no longer featured as the front page of java.net it will be archived along with other past issues in the java.net Archive. MPEG finally notices Java »
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