Java Today

Genuitec's MyEclipse 6.0 is all about the developer. Now based on Eclipse 3.3, the new version of this integrated Eclipse distribution includes a database and Tomcat 6.0, so that developers can deploy their application for on-desktop testing with just a few clicks. Elsewhere in this update are expanded Swing support, new AJAX debugging tools and access to a repository of sample code.

MyEclipse 6.0 standard edition costs US$29.95 per year, per seat. The professional edition, which costs $49.95 per user per year, includes UML and architectural tooling features as well.

Introducing ClickStream

OpenSymphony's ClickStream is a user tracking component for Java web applications. This means you can take a look and analyze the traffic paths and the sequence of pages that users have generated as they browsed your site.
This traffic path is called a clickstream and it is the logical
grouping of a HTTP session identifier and the requests associated
with it, until the end of this session. The good news is you can
easily add this feature to your application by embedding
OpenSymphony's ClickStream to take advantage of this site usage information.

Geert Bevin gives a concise overview of how Terracotta clustering works and describes how easy it is to integrate it with your applications in a transparent way, unlike other clustering technologies that require programmer participation to make them work. "Terracotta's philosophy is to treat clustering the same way as garbage collection," he said. Geert also talks about his work in continuations and clustering, and gives a few examples of how continuations work, and why they're important to web developers.

• An interactive and simple interface to manage their projects (AJAX-based)


• Tools to increase the visibility and traceability of ongoing versions

New widgets and libraries

• RichTextArea, HorizontalSplitPanel and VerticalSplitPanel, SuggestBox, DisclosurePanel, PushButton, ToggleButton, and an enhanced Image widget make advanced applications easier than ever.
• ImageBundle automatically consolidates multiple images into a single HTTP request.
• NumberFormat and DateTimeFormat make easy work of complex internationalization and localization.
• You can finally use java.lang.Serializable with GWT RPC, and the GWT RPC server-side subsystem is no longer intimately tied to servlets. You can easily wire it into any Java back-end infrastructure. Spring fans, rejoice.
• A new JUnit-based benchmarking subsystem makes measuring and comparing the speed of code snippets as easy as writing unit tests.

New deployment options and optimizations

• Adding GWT modules to an HTML page is now simple: just add a <script> tag.
• You can now include GWT modules across domains. Note that including scripts from other sites that you don't fully trust is a big security risk.
• External JavaScript files referenced from your GWT module load synchronously now, so script ready-functions are no longer needed.
• Auto-generated RPC whitelist files are now produced during compilation to help catch accidentally responding with objects that compiled GWT client code wouldn't be able to deserialize.
• The GWT distribution now includes a DTD for the GWT module XML format, making it easier to configure modules in an DTD-aware XML editor.

There's lots and lots of cool new stuff in GWT 1.4, so it's hard to know where to start.

How about application performance?! This release includes several breakthroughs that make your compiled GWT code significantly smaller and faster. Many users are reporting that after a simple recompile with 1.4, their applications are up to 30% smaller and 20%-50% faster. And startup time in particular is now highly optimized thanks to a new bootstrapping technique and the availability of image bundles.

To see the new hotness in action, try visiting the new-and-improved Mail sample a few times. It's darn fast the very first time you visit it, but subsequent visits are insanely fast. That's because, in addition to a fast initial startup, GWT code uses a clever caching technique to prevent applications from making unnecessary HTTP requests.

As Joel Webber (Tech Lead of GWT Core Libraries) would say, "The fastest HTTP requests are those that do not, in fact, occur."

ZDNet Asia's interview with Sun staff engineer Lee Chuk Munn, who likens writing applications to writing books. The habits he cited include: understand the problem, use appropriate tools, strive for simplicity, and so forth.

"Programming is just an expression to a solution. A lot of it is about understanding and recognizing the problem and getting help. This [concept] is generic across all programming languages, it doesn't matter what you use--whether it's C+ or Java. The approach is still the same," he said.

"What irks me is developers today are churning out applications without any regard or love for it. That's my number one pet peeve. So, it's like they're doing it for the money which is good, if you're a project lead, but you need to put in some concern and care into what you're building and not just in shipping [the application]," he noted.