For all I know this issue could be a very old and well-known one, but I never heard of it and apparently neither have JavaBlogs owners. If you’re making a public site make sure to keep this in mind.

LinkedIn, Corp. has purchased JavaRebel licenses for all its Java engineers to use in the well-known social networking website development. The website, written almost exclusively in Java, can now be updated on-the-fly in development, boosting the LinkedIn engineer productivity.

The latest stable release of the JavaRebel code reloading agent includes a plugin for Spring that reloads Spring configuration on-the-fly boosting development productivity even more.

There has been a lot of discussion regarding the use of JavaRebel with WTP. JavaRebel does work with WTP but the configuration is not that straightforward. In this article we'll try to give step by step instructions on how to make WTP and JavaRebel get along.

IP2C is a small library that provides IP to country resolution. It uses the free ip-to-country database. There is a PHP and Java frontends to query the database, but PHP implementation is embarrassingly slower (at least an order of magnitude!). Can we do better or is this a basic limitation of the platform?

What is RIA? “Old body with a new face” — just a new client slammed on top of the same old applications server. The spectrum of RIA apparently includes “Internet-enabled client”, “Smart client” and “Web 2.0″.

We prepared a short screencast that demonstrates how easy it is to develop Swing applications with JavaRebel. We used the simple Metalworks example (a multiwindow mail client mockup) that comes with the Java SDK and played around with adding fields and buttons. All changes were reloaded instantly without restarting the application.

We decided that we can facilitate the Scala adoption by putting its productivity on par with the dynamic languages. To do that we have created a special JavaRebel license that can only be used to reload Scala classes, which we donated to the Scala community for free use for a year.

The problem with Java “closures” aka anonymous inner classes being a tad too ugly is a well known one, but this semi-solution seems to be quite unused. Although you can apply the same principle for many situations it’ll work best for embedded DSLs.

ZeroTurnaround has announced the final release of JavaRebel 1.1. JavaRebel is a JVM plugin (-javaagent) that enables reloading changes made to Java class files on-the-fly, saving developers the time that it takes to redeploy an application or perform a container restart.

The Scala lift off is be a great place for members of the Scala and lift communities to get together, learn about Scala, learn about lift and get to know each other face to face. There will be Scala tracks going all day long and lift tracks to suits everyone's interests.

This entry explains how to dynamically reload the Jersey deployed web application in response to callbacks from JavaRebel when in detects changes to class files. Because Jersey caches runtime information about classes, for performance reasons, it needs to be informed to update information about classes that have changed. So adding a new HTTP method or a new resource class can be detected.

So we have a cloud, we have python and we have DB access. People want MORE!

The latest release of JavaRebel introduced two new approaches for achieving zero turnaround. Even if you have deployed your EAR/WAR/JAR as archives you can make the application use the classes that you are compiling on-the-fly with your IDE.

I was just fiddling around and for some strange reason I happened to telnet to the running database. I issued two commands and BOOOM!

Some websites should never be offline

For all you Twitter fans like myself I redirected the frontpage feed to the "dzone" twitter bot.

Some users of JavaRebel have complained that it improves productivity to the point where there are no good reasons for a coffee break. The latest version of JavaRebel allows you to take your coffee and continues to program while you're away.

Domain Specific Languages (DSLs) have been brought to Java under the name of Fluent Interface. However most of them utilize a lot of strings and untyped behavior to make the interface fluent enough. It turns out that using Java 5 and a bag of tricks we can have the compiler to check a lot more. In this post we'll check out how to write Java bytecode using ASM in a typesafe way.

Mozilla Prism is a “One Site Browser”, which is to say a browser started from your desktop tied to one particular web site. I have been using it since the first release, mainly to separate the Google Mail, Reader and Calendar windows from the rest of my browsing experience.

Amazon web services is an offering to host your data and software at Amazon with massive virtualization and an interface over web services.

Erich Gamma gave a talk on Eclipse, which is a variation on the theme he’s been doing for some time now on various conferences. The main difference to the previous years is the part about Jazz.

One of the inconveniences that our users frequently report is stepping in/out of the code managed by JavaRebel. However we have found that most IDEs today provide a way to filter out JavaRebel methods and in this article we will show how to configure Eclipse and IDEA to make your debugging as pleasant as ever.

As more and more applications are written in JavaScript its quirks are becoming legendary. Test your knowledge of JavaScript with these 6 puzzles or just be amazed how weird can it get.

All the app servers and servlet containers I’ve seen these days the IBM’s Websphere Application Server tops them all. The most unexpected, complicated and difficult to understand by far.