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Google To Unveil GWT 1.5 at Developer Conference
5/27/2008
Google is set to unveil the latest version of the Google Web Toolkit (GWT) at the company's first big developer conference, Google I/O, scheduled to run this week (May 28 and 29) in San Francisco.
The free GWT is an open source development framework aimed at Web application builders who want to use the Asynchronous JavaScript and XML technique (Ajax) without having to learn JavaScript. Developers use the toolkit to write their applications using Java, and then the GWT compiles that code into highly optimized JavaScript, explained Google engineering manager Bruce Johnson, co-creator of the GWT.
This version of the GWT will offerfull support for Java 5, including generics and annotations, Johnson said, as well as new features designed specifically to support the development of high-performance applications. Among these is a new set of compiler optimizations; using the GWT 1.5 to write Java code compiled into JavaScript is faster, Johnson said, than writing the JavaScript code by hand. The new GWT also comes with a set of API libraries, including one that supports the Google Gears online/offline browser extension.
Perhaps most important, GWT 1.5 solves the browser compatibility problems that plague JavaScript users, and which are becoming more of an issue as developers push the capabilities of Web applications, Johnson said. JavaScript's lack of modularity makes sharing, testing, and reusing Ajax components problematic, he explained.
Browser compatibility is no small issue for developers, said Ray Valdes, research director in industry analyst firm Gartner's Web services group. "It has only been in the last couple of years that browsers have reached the level of consistency and compatibility that allows you to write to standards, rather than the individual browsers," he said. "In the past you sort of had to developer for Microsoft's Internet Explorer and just forget about everybody else. Now you have Firefox growing in popularity. Apple's Safari actually has dominant market share on laptops costing more than a thousand dollars. And you have the mobile browsers."
The GWT is one of about 150 Ajax toolkits currently available to Web developers, but its Google pedigree is likely to send it toward the head of the line, Valdes said. He ranks it among the top toolkits, along with Dojo (which he ranks number one, in terms of developer usage), Prototype, jQuery, Mootools, and Ext JS.
"Of course, everybody has an Ajax toolkit," Valdes said. "Microsoft has one called Atlas, even though they have ASP.NET. Adobe has one called Spry, even though they have Flex. Yahoo has one called the Yahoo User Interface Library (YUI), which of this group is the one that is the most complete, and powerful, and gets the most developer support. None of these are money makers, they're not strategic, they're not always formally supported, and they can be directly competitive with the vendors other products."
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