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Dave Johnson on software development, Java, and the Roller Weblogger project. |
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http://www.rollerweblogger.org/rss/roller?catname=Java |
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Blogging Roller
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Atom news: Apache Abdera graduates
Fri, 21 Nov 2008 15:54:48 -0500
Congratulations to the Apache Abdera team, who've just graduated to full Apache top level project status. The don't have the new site at abdera.apache.org up yet and they're still not quite at 1.0 yet, but this is a major milestone. They've got the best Atom format and protocol toolkit around, in my opinion.
via Garett and James.
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RESTful JSF in the works?
Fri, 8 Aug 2008 15:52:58 -0400
JSF spec lead Ed Burns just pointed out that some of my Sun-internal comments about JSF have made it outside the firewall and into an issue on the JSF specification project:
On Wed, 19 Mar 2008, David M Johnson said:
I think the goal should be to make JSF applications RESTful by
default, with proper use of GET and POST, i.e. only use POST when
application data is changing, not for component state. Another goal
should be clean, book-markable URLs that only carry path-info and
parameters needed by the application logic.
That's easy and the default situation with Rails, Grails, Struts, etc.
How hard would it be to redesign JSF along those lines? Would it
require EJB2 -> EJB3 level changes to JSF?
I suspect work on JSF 2.0 is too far along for this kind of change now, but it's nice to hear that the idea of a truly RESTful JSF is at least under consideration.
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Struts 2 in Action
Wed, 7 May 2008 12:19:49 -0400
Struts 2 is my favorite Java web framework these days; it's REST-friendly, simple, easy to use, very flexible and the only thing it has with its creaky old Struts 1.x parent is the fact that it's an action framework rather than a component framework like JSF. As most of my readers probably already know, Struts 2 is based on WebWork/XWork the framework that powers JIRA and Confluence, two of the coolest Java webapps around.
Apparently, I'm not alone in this thinking -- I keep on running into folks at JavaOne who feel the same way. But unfortunately, Struts 2 docs are lacking, so I was very happy to see two new books on Struts 2 at the JavaOne bookstore. There's Struts 2 in Action, a rewrite of the classic Manning book, and Practical Apache Struts 2 Web 2.0 Projects from Apress.
I picked up a copy of Struts 2 in Action on Monday and it looks great so far, but I've only skimmed it. I'll let you know what I think once I dig-in on the flight home.
If you're at JavaOne, check out TS-5739 - Hands-on Struts2 by Ian Roughley (author of the Apress book) today at 10:50 AM in Esplanade 307/310.
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Social Software at JavaOne 2008
Tue, 29 Apr 2008 15:00:08 -0400
There are quite a number of Social Software related talks coming up at JavaOne and CommunityOne this year. You can learn about everything from building Social Networks with the Liferay portal and federated relationships with OpenSSO to creating 3D virtual works and implementing OpenSocial with Java. And, I'll finally be able to talk about what I've been working on for the past couple of months -- more about that later.
Here are the 11 Social Software related talks that I've found so far at both JavaOne and CommunityOne. Did I leave any out?
CommunityOne - Monday
S297141 - Building a Social Network with Liferay Portal
Brian Chan, Liferay, Inc.
Monday May 05 12:25 - 13:20 / Moscone North - Hall E 135
S295742 - Turn Your Web Site into an OpenSocial Container
Dave Johnson and Vijay Ramachandran, Sun Microsystems, Inc.
Monday May 05 14:35 - 15:30 / Moscone North - Hall E 135
S297300 - OpenSSO: Federated Relationships with Social Networking and Web 2.0
Pat Patterson, Daniel Raskin and Nick Wooler, Sun Microsystems, Inc.
Monday May 05 16:00 - 16:55 - Moscone North - Hall E 135
JavaOne - Tuesday
TS-6125 - Project Wonderland: A Toolkit for Building 3-D Virtual Worlds
Paul Byrne and Jonathan Kaplan, Sun Microsystems, Inc.
Tuesday 05/06/2008 3:20 PM -4:20 PM / North Mtg-121/122/124/125
JavaOne - Wednesday
TS-6574 - How to Implement Your Own OpenSocial Container with Java
Chris Schalk, Google
Wednesday 05/07/2008 1:30 PM -2:30 PM
JavaOne - Thursday
BOF-6362 - LinkedIn: Prof. Social Network Built with Java and Agile Practices
Nick Dellamaggiore and Eishay Smith, LinkedIn
Thursday 05/08/2008 6:30 PM -7:20 PM / Esplanade 301
BOF-5857 - Turn Your Web Site into an OpenSocial Container
Dave Johnson and Jamey Wood, Sun Microsystems, Inc.
Thursday 05/08/2008 6:30 PM
BOF-6575 - Building OpenSocial JavaServer Faces Components
Ed Burns, Sun Microsystems, Inc.; Chris Schalk, Google
Thursday 05/08/2008 7:30 PM -8:20 PM
BOF-5911 - Beatnik: Building an Open Social Network Browser
Tim Boudreau and Henry Story, Sun Microsystems, Inc.
Thursday 05/08/2008 7:30 PM -8:20 PM
BOF-6435 - Creating Facebook and OpenSocial Widgets with Java
Florent Gerbod and Kevin Leong, Mo'Blast Inc.
Thursday 05/08/2008 8:30 PM -9:20 PM
JavaOne - Friday
TS-6537 - Applications for the Masses by the Masses
Girish Balachandran and Todd Fast, Sun Microsystems, Inc.
Friday 05/09/2008 10:50 AM -11:50 AM
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Social Software for Glassfish screencast
Thu, 21 Feb 2008 16:13:44 -0500
I mentioned the Social Software for Glassfish (SSG) EA2 release before the winter break, but I never got around to posting any details.
Since then
some documentation has appeared,
Manveen Kaur blogged it,
The Aquarium too
and now screen-cast master
Arun Gupta has created an excellent
Social Software for Glassfish screencast
that walks you through the features in this very early access release. Now I don't have to say nearly as much.
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Abdera AtomPub server refactoring
Mon, 28 Jan 2008 09:05:45 -0500
I've got to carve out some time ASAP to take a close look at this.
The code is in Abdera SVN and there's
20-minute implementation guide (PDF) too:
James Snell: Dan Diephouse and I have been spending the last week refactoring the Abdera server framework with the goal of making is less complicated, easier, and generally better.
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Yahoo Weather RSS module for ROME
Wed, 23 Jan 2008 15:40:22 -0500
Apparently, I spoke to soon about ROME being in maintenance mode. There's an all-new
Yahoo Weather module for
ROME from
Robert "kerbernet" Cooper.
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ROME vs. Abdera
Tue, 22 Jan 2008 18:18:40 -0500
For Java developers starting out with RSS and Atom, here are some notes to help you figure out the differences between the Java.net ROME and Apache Abdera (incubating) projects.
ROME is a set of Java tools for parsing, fetching and generating all forms of RSS and Atom feeds. The core ROME library is relatively small and depends only on the somewhat creaky old JDOM XML parser. Available separately are modules to support various feed extensions such as OpenSearch, iTunes, GeoRSS, etc. ROME was originally developed and open sourced by Sun Portal dev team members in 2004.
ROME Propono is a subproject of ROME that supports publishing/editing entries and files to blog servers and AtomPub servers. Propono is made up of three parts: 1) a Blog Client library can publish via either the old lagacy MetaWeblog API or the shiny new AtomPub protocol, 2) an AtomPub client that publishes only via AtomPub and 3) a framework for creating AtomPub servers. Propono was developed by Ramesh Mandava and Dave Johnson, based on code from RSS and Atom in Action and open sourced as part of the Sun Web Developer Pack in 2007.
Abdera is a set of Java tools for working with Atom feeds and AtomPub protocol. This includes a parser, writers, an AtomPub client and a framework for creating AtomPub servers. Abdera's Atom feed parser uses STAX, so it uses less memory and is faster than ROME. Abdera's Atom feed support is more comprehensive than ROME's and it supports signatures, encryption, Atom to JSON, extensions for Threading, Paging, GeoRSS, OpenSearch, GoogleLogin, etc. etc. Abdera was developed by IBM and contribued to Apache in 2006.
Now let's compare frameworks. The pros and cons of ROME are:
Pro: complete RSS support, all of the dozen various flavors
Pro: it's generally simple and small, depending only one jar (JDOM)
Pro: easy to understand and use the AtomPub server framework
Pro: MetaWeblog API support
Con: Atom feed support not as comprehensive as Abdera
Con: parser uses lots of memory, slower, JDOM based
Con: community not as active, seems to be in maintenance mode
(See also Ohloh stats)
The pros and cons of Abdera are:
Pro: comprehensive Atom feed support, lots more Atom extensions
Pro: faster more efficient parser
Pro: In the Apache Incubator with active and growing community
(See also Ohloh stats)
Con: lots of dependencies
Con: AtomPub server framework poorly documented, overly complex (rewrite coming soon)
Con: no RSS support (there is something in Abdera contrib, but it's incomplete).
There you have it. ROME and Abdera folks: think that's a fair comparison? Are you a ROME or Abdera user? How would you like to see these frameworks move forward?
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Holiday project: JMaki for Roller
Wed, 2 Jan 2008 13:12:54 -0500
Over the holidays I avoided doing anything directly related to my current set of work tasks. Sun went quiet, which helped, and I ignored the messages that piled-up in the Roller user and dev lists. It was so quiet that I had time for a fun little project: a JMaki plugin for Roller.
JMaki makes it easy to use JavaScript widgets (Dojo, Google, YUI, etc.) from PHP, JSP, JSF and now Roller. To use a widget, all you have to do is call a method or include a tag and JMaki takes care of including the right JavaScript files and generating the right HTML for you. That's not all JMaki does, there's also a pub/sub facility to make it easy to wire widgets together via events, there's a proxy for fetching remote resources common table and tree data models. The theme is cool widgets with ease-of-development and that's what I'd like to see in Roller. You can read more about the JMaki value proposition on the Why Use JMaki page.
Here's an example. Below is a Roller page template that uses two JavaScript widgest, the Dojo Clock and the YUI Data Table. All it takes is a single line of template code to include each widget, and one widget is dynamic i.e. the table is populated via an RSS feed.
<html>
<head><title>JMaki test page</title></head>
<body>
<h1>JMaki test: dojo.clock</h1>
$jmaki.addWidget("dojo.clock")
<h1>JMaki test: yahoo.dataTable</h1>
$jmaki.addWidget("yahoo.dataTable", "/roller/xhp?id=rss","","")
</body>
</html>
And here's what that page looks like when displayed by Roller:
I'll write more about the plugin once I install it on this site. If you want some details about how the plugin was developed, you can read the email that I sent to the JMaki dev list: JMaki for Roller issues and suggestions. It links to the Java source code for the plugin.
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PHP support in Netbeans
Wed, 28 Nov 2007 16:55:37 -0500
Hadn't heard about this one until today, but Netbeans 6.1 will have plugin support for creating, editing, deploying to Apache HTTPD, running and even debugging PHP projects. Check out the details and screenshots on the
Phantom Reference blog.
Here's a sceenshot from the Netbeans Wiki page on PHP:
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