Raible Designs

TSSJS BOF: Web Framework Sweet Spots

I'm leading a BOF at this year's TSS Java Symposium titled Web Framework Sweet Spots.

The objective of this BOF is to discuss the various open source web frameworks and what each does well. Matt kicks off the discussion by highlighting the good features of various frameworks, (results of pre-conference discussions with various framework authors to get their opinions on what problems their framework solves best) as well as debunk some myths based on audience members real-world experiences.

Yesterday, I sent an e-mail the authors of the most popular web frameworks in JavaLand. In my opinion, these are (in alphabetical order): Cocoon, JSF, RIFE, Seam, Spring MVC, Spring Web Flow, Struts, Trails, Tapestry, WebWork and Wicket. If your framework isn't on this list, I'm sorry. If you can prove to me that yours is more popular than one of the ones listed here, I'll send you the questionnaire and add you to the list. I've received a few responses, and I doubt all authors will respond, so there might be some room.

If you're going to be at Caesar's Palace for TSSJS 2006, I invite you to stop by on Friday night at 6:30. I've asked the TechTarget folks several times about getting beer served at this BOF, but they keep ignoring the question. I think it's time to contact Caesar's - since it is legal to have a beer pretty much anywhere in Vegas.

Developers have the best job in the world

I've often said that being a Software Developer is the "Doctor of The Aughts" - now there's proof.

OpenLaszlo supports Ajaxified output

I heard this was coming, but I didn't expect it so soon.

There has been some crazy, crazy work going on here in the last month or two and the result is amazing. Today at etech, we’re demoing an early alpha of OpenLaszlo’s new DHTML backend. Truth! Press Release!

Here’s a new demo showing off the goods:

• LzPix demo, Flash version
• LzPix demo, DHTML version
• LzPix demo, source code

That’s a live OpenLaszlo server, running both apps from the same source code.

Also, new shiny openlaszlo.org page, with links to the DHTML demo.

This demo definitely works best in Firefox, but it's damn impressive. It's tough to test which medium you're using if you open them side-by-side. My hats off to you OpenLaszlo Developers - well done.

Spring Fundamentals in Boston almost sold out...

If you're looking to learn Spring and live near Boston, I'm coming to town on March 14th to teach our Spring Fundamentals course. We're getting pretty close to capacity, so sign up now before it's sold out!

And yes, I will be staying in Boston on Friday night for St. Patty's day. Should be a good time for sure.

Which Ajax enabled framework should you use as an Enterprise Java developer?

Paul Browne asks (and answers) "which Ajax enabled framework should you use as an Enterprise Java developer?":

Paul goes on to show you how he researched the Ajax-enabled Java frameworks that are currently available and gives a set of criteria he used. His conclusions?

• Use AjaxAnywhere if you need to add Ajax functionality to an existing Struts application.
• For new applications with Ajax, use AppFuse. While he recommends the Struts version, I recommend using the other flavors first (Spring MVC, WebWork, Tapestry or MyFaces).
• For the future (which I believe is what he means by medium-term), use a JSF implementation. AppFuse currently uses MyFaces, and it's likely we'll keep improving that (possibly with a Shale front-controller or some nifty things the Spring team has been adding).

Sun's Guerilla Cannibal Team

James Governor:

It's not every day you get listed with a line-up like that! Like Simon Phipps commented - where should I send my resume? Looks like I owe the RedMonk guys a beer or 6.

DbUnit Tip: Turn off foreign key constraints when importing into MySQL

One of the issues I've had with using DbUnit is getting tables to load in the proper order from XML. The XML datasets I use to load table data are flat and don't really have any notion of foreign keys and such. Therefore, when you get into a situation where tables have a circular reference, using DbUnit can be a real bitch. I ran into this situation yesterday.

Luckily, I was able to figure out a solution thanks to the help of Mark Matthews. Just add "sessionVariables=FOREIGN_KEY_CHECKS=0" to your JDBC URL. Here's how the "db-load" target in AppFuse looks with this in place:

    <target name="db-load" depends="prepare"
        description="Loads the database with sample data">
        <property name="operation" value="CLEAN_INSERT"/>
        <property name="file" value="metadata/sql/sample-data.xml"/>
        <dbunit driver="${database.driver_class}"
            supportBatchStatement="false" 
            url="${database.url}&amp;sessionVariables=FOREIGN_KEY_CHECKS=0"
            userid="${database.username}" password="${database.password}">
            <operation type="${operation}" src="${file}" format="xml" transaction="true"/>
        </dbunit>

    </target>

Does your preferred database have a similar mechanism for turning off foreign key checks using the connection URL?

Why I like Tomcat 5.5.12 better than Tomcat 5.5.15

Here's what happens with Tomcat 5.5.15:

alotta:~/dev/appfuse mraible$ export CATALINA_HOME=$TOOLS_HOME/apache-tomcat-5.5.15
alotta:~/dev/appfuse mraible$ ant deploy;tstart
Buildfile: build.xml

...

deploy:
    [unwar] Expanding: /Users/mraible/Work/appfuse/dist/webapps/appfuse.war into
 /opt/dev/tools/apache-tomcat-5.5.15/webapps/appfuse

BUILD SUCCESSFUL
Total time: 3 seconds
Using CATALINA_BASE:   /opt/dev/tools/apache-tomcat-5.5.15
Using CATALINA_HOME:   /opt/dev/tools/apache-tomcat-5.5.15
Using CATALINA_TMPDIR: /opt/dev/tools/apache-tomcat-5.5.15/temp
Using JRE_HOME:       /Library/Java/Home
alotta:~/dev/appfuse mraible$ ant reload
Buildfile: build.xml

reload:
   [reload] FAIL - Encountered exception java.lang.NoClassDefFoundError: 
org/apache/log4j/spi/VectorWriter

BUILD FAILED
/Users/mraible/Work/appfuse/build.xml:1063: FAIL - Encountered exception 
java.lang.NoClassDefFoundError: org/apache/log4j/spi/VectorWriter

Total time: 1 second
alotta:~/dev/appfuse mraible$ 

Here's what happens with Tomcat 5.5.12:

alotta:~/dev/appfuse mraible$ export CATALINA_HOME=$TOOLS_HOME/apache-tomcat-5.5.12
alotta:~/dev/appfuse mraible$ ant deploy;tstart

...

BUILD SUCCESSFUL
Total time: 4 seconds
Using CATALINA_BASE:   /opt/dev/tools/apache-tomcat-5.5.12
Using CATALINA_HOME:   /opt/dev/tools/apache-tomcat-5.5.12
Using CATALINA_TMPDIR: /opt/dev/tools/apache-tomcat-5.5.12/temp
Using JRE_HOME:       /Library/Java/Home
alotta:~/dev/appfuse mraible$ ant reload
Buildfile: build.xml

reload:
   [reload] OK - Reloaded application at context path /appfuse

BUILD SUCCESSFUL
Total time: 3 seconds
alotta:~/dev/appfuse mraible$ 

Looks like I'll be sticking with 5.5.12 for the foreseeable future.

Canoo WebTest Firefox Plugin

Canoo WebTest now has a Firefox plugin, similar to Selenium IDE. I gave it a 2-minute test using Deer Park (a.k.a. Firefox) on my MacBook Pro. Thumbs down, not intuitive enough. Of course, if it had a video like Selenium's video, it might be easier to figure out.

OpenLaszlo Tutorial and AppFuse with DWR

A few web development nuggets:

• Web clients fatten up with OpenLaszlo - good article about using OpenLaszlo on developerWorks.
• AJAX using DWR in AppFuse - a tutorial showing how to use DWR in AppFuse, written by Josip Mihelko. Please try it out and let us know how we can improve it.

I also noticed a recently updated howto on the AppFuse wiki: Spring Rich Client with AppFuse by Radim Burget. The amount of documentation being produced by the AppFuse community is truly awesome. Thanks everyone!

Update: XFire is crazy fast. If you like, you can see for yourself in AppFuse using OpenLaszlo as a client. Hopefully we can include XFire in a coming release, along with Maven 2 integration.