Arun Gupta, Miles to go ...

TOTD #87: How to fix the error undefined method `new' for "Rack::Lock":String caused by Warbler/JRuby-Rack ?

If you are using Warbler to create a WAR file of your application and deploying on GlassFish or any other Servlet container, then you are likely seeing the following error during deployment:

1. Do "warble war:clean" to clean up the .war file and staging area. This basically removes previous version of jruby-rack.jar.
2. Download the latest jruby-rack-0.9.5 snapshot (complete list) and copy in the "lib" directory of your application.
3. If "config/warble.rb" does not exist then generate it using "jruby -S config warble". Edit "config/warble.rb" such that it looks like:
   
   

   # Additional Java .jar files to include. Note that if .jar files are placed   # in lib (and not otherwise excluded) then they need not be mentioned here.   # JRuby and JRuby-Rack are pre-loaded in this list. Be sure to include your   # own versions if you directly set the value   # config.java_libs += FileList["lib/java/*.jar"]   config.java_libs.delete_if {|f| f =~ /jruby-rack/ }   config.java_libs += FileList["lib/jruby-rack*.jar"]

   
   This will pack jruby-rack-0.9.5 snapshot instead of the one bundled with Warbler.
   
   Now warbler 1.0.0 bundles "jruby-complete-1.3.0RC1.jar". Optionally, you can also download the latest jruby-complete (jruby-complete-1.3.1.jar as of this writing) and copy in the "lib" directory of your application. In that case, modify the above fragment to:
   
   

   # Additional Java .jar files to include. Note that if .jar files are placed   # in lib (and not otherwise excluded) then they need not be mentioned here.   # JRuby and JRuby-Rack are pre-loaded in this list. Be sure to include your   # own versions if you directly set the value   # config.java_libs += FileList["lib/java/*.jar"]   config.java_libs.delete_if {|f| f =~ /jruby-rack/ || f =~ /jruby-complete/ }   config.java_libs += FileList["lib/jruby-complete*.jar"]   config.java_libs += FileList["lib/jruby-rack*.jar"]

   
   This packs the "jruby-complete-1.3.1.jar" in your .war file.

Posted by Arun Gupta in web2.0  |  Comments[7]

TOTD# 86: Getting Started with Apache Wicket on GlassFish

Apache Wicket is an application framework to build web applications using HTML for markup and POJOs to capture the business logic and all other processing. Why Wicket digs more into the motivation behind this framework.

1. Create a Wicket project as:
   
   

   ~/samples/wicket >mvn archetype:create -DarchetypeGroupId=org.apache.wicket -DarchetypeArtifactId=wicket-archetype-quickstart -DarchetypeVersion=1.3.6 -DgroupId=org.glassfish.samples -DartifactId=helloworld [INFO] Scanning for projects... [INFO] Searching repository for plugin with prefix: 'archetype'. [INFO] ------------------------------------------------------------------------ [INFO] Building Maven Default Project [INFO]    task-segment: [archetype:create] (aggregator-style) [INFO] ------------------------------------------------------------------------ [INFO] Setting property: classpath.resource.loader.class => 'org.codehaus.plexus.velocity.ContextClassLoaderResourceLoader'. [INFO] Setting property: velocimacro.messages.on => 'false'. [INFO] Setting property: resource.loader => 'classpath'. [INFO] Setting property: resource.manager.logwhenfound => 'false'. [INFO] [archetype:create] [WARNING] This goal is deprecated. Please use mvn archetype:generate instead [INFO] Defaulting package to group ID: org.glassfish.samples [INFO] ---------------------------------------------------------------------------- [INFO] Using following parameters for creating OldArchetype: wicket-archetype-quickstart:1.3.6 [INFO] ---------------------------------------------------------------------------- [INFO] Parameter: groupId, Value: org.glassfish.samples [INFO] Parameter: packageName, Value: org.glassfish.samples [INFO] Parameter: package, Value: org.glassfish.samples [INFO] Parameter: artifactId, Value: helloworld [INFO] Parameter: basedir, Value: /Users/arungupta/samples/wicket [INFO] Parameter: version, Value: 1.0-SNAPSHOT [INFO] ********************* End of debug info from resources from generated POM *********************** [INFO] OldArchetype created in dir: /Users/arungupta/samples/wicket/helloworld [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESSFUL [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3 seconds [INFO] Finished at: Tue Jul 28 15:30:21 PDT 2009 [INFO] Final Memory: 12M/80M [INFO] ------------------------------------------------------------------------

2. Run it using the pre-configured Jetty plugin as:
   
   

   ~/samples/wicket/helloworld >mvn jetty:run [INFO] Scanning for projects... [INFO] Searching repository for plugin with prefix: 'jetty'. [INFO] ------------------------------------------------------------------------ [INFO] Building quickstart [INFO]    task-segment: [jetty:run] [INFO] ------------------------------------------------------------------------ [INFO] Preparing jetty:run [INFO] [resources:resources] [INFO] Using default encoding to copy filtered resources. [INFO] [compiler:compile] [INFO] Compiling 2 source files to /Users/arungupta/samples/wicket/helloworld/target/classes [INFO] [resources:testResources] [INFO] Using default encoding to copy filtered resources. [INFO] [compiler:testCompile] [INFO] Compiling 2 source files to /Users/arungupta/samples/wicket/helloworld/target/test-classes [INFO] [jetty:run] [INFO] Configuring Jetty for project: quickstart [INFO] Webapp source directory = /Users/arungupta/samples/wicket/helloworld/src/main/webapp [INFO] Reload Mechanic: automatic [INFO] Classes = /Users/arungupta/samples/wicket/helloworld/target/classes 2009-07-28 15:31:35.820::INFO:  Logging to STDERR via org.mortbay.log.StdErrLog [INFO] Context path = /helloworld [INFO] Tmp directory =  determined at runtime [INFO] Web defaults = org/mortbay/jetty/webapp/webdefault.xml [INFO] Web overrides =  none . . . INFO  - WebApplication             - [WicketApplication] Started Wicket version 1.3.6 in development mode ******************************************************************** *** WARNING: Wicket is running in DEVELOPMENT mode.              *** ***                               ^^^^^^^^^^^                    *** *** Do NOT deploy to your live server(s) without changing this.  *** *** See Application#getConfigurationType() for more information. *** ******************************************************************** 2009-07-28 15:31:37.333::INFO:  Started SelectChannelConnector@0.0.0.0:8080 [INFO] Started Jetty Server

   
   And the default web page is available at "http://localhost:8080/helloworld" and looks like:
   
   
   
   A later blog will show how to run this application using Embedded GlassFish. But for now lets package the application as a WAR file and deploy it on GlassFish.
3. Download GlassFish v3 Preview and unzip.
4. Create a WAR file as:
   
   

   ~/samples/wicket/helloworld >mvn package [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [INFO] Building quickstart [INFO]    task-segment: [package] . . . [INFO] Processing war project [INFO] Webapp assembled in[494 msecs] [INFO] Building war: /Users/arungupta/samples/wicket/helloworld/target/helloworld-1.0-SNAPSHOT.war [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESSFUL [INFO] ------------------------------------------------------------------------ [INFO] Total time: 6 seconds [INFO] Finished at: Tue Jul 28 15:35:59 PDT 2009 [INFO] Final Memory: 14M/80M [INFO] ------------------------------------------------------------------------

   
   and deploy as:
   
   

   ~/samples/wicket/helloworld >~/tools/glassfish/v3/preview/glassfishv3/bin/asadmin deploy target/helloworld-1.0-SNAPSHOT.war Command deploy executed successfully.

   
   The app is now accessible at "http://localhost:8080/helloworld-1.0-SNAPSHOT" and looks like:
   
   

• Wicket Quickstart shows how to create a Wicket application and get started easily.
• Wicket Examples provide a flavor of how the code is structured.
• Wicket in Action is a great book that explains the concepts very well.
• May want to look at wicket-extensions for a list of gadgets/widgets that extend the core capability of the framework.

• Run Wicket application using Embedded GlassFish
• Use Servlet 3.0 web-fragments.xml and leverage GlassFish v3 Pluggability to run Wicket applications
• A Wicket version of Track your running miles application
• Deploying Wicket applications from NetBeans to GlassFish

Posted by Arun Gupta in web2.0  |  Comments[3]

Track your running miles using JRuby, Ruby-on-Rails, GlassFish, NetBeans, MySQL, and YUI Charts

This blog introduces a new application that will provide basic tracking of your running distance and generate charts to monitor progress. There are numerous similar applications that are already available/hosted and this is a very basic application. What's different about this ?

The first version of this application is built using JRuby, Ruby-on-Rails, GlassFish Gem, MySQL, and NetBeans IDE. This combination of technologies is a high quality Rails stack that is used in production deploymnet at various places. Still nothing different ?

A similar version of this application will be built using a variety of Web frameworks such as Java EE, Grails, Wicket, Spring and Struts2 (in no particular order). The goal is to provide a similar application, slightly bigger than "Hello World," built using different frameworks and deploy on GlassFish. Each framework will then be evaluated based upon the criteria ranging from the basic principles of framework, ease-of-use in design/development/testing/debugging/production of this web app, database interaction, tools support, ability to add 3rd party libraries, browser compatibility and other points. 

An important point to note is that this is not an exhaustive evaluation of different Web frameworks and the scope is limited only to this application.

A complete list of frameworks planned is available here. The criteria used to evaluate each framework is described here. Your feedback in terms of Web frameworks and evaluation criteria is highly appreciated.  Please share your feedback on the users list.

Now the first version of application. The complete instructions to check out and run the Rails version of this application are available here.

Here are some charts generated using the application:



and



YUI is used for all the charting capabilities.

And here is a short video that explains how the application work:



If you are a runner, check out the application and use it for tracking your miles. A sample runlog is available in "test/fixtures/runlogs.yml" and races in "test/fixtures/races.yml".

If you know Rails, please provide feedback if the application is DRY and using the right set of helpers.

If you'd like the existing list of web frameworks to be pruned or include another one to the list, let us know.

Share you feedback at users@runner.kenai.com.

Technorati: jruby rubyonrails glassfish netbeans mysql yahoo yui chart running miles framework

Posted by Arun Gupta in Running  |  Comments[2]

San Francisco Half Marathon 2009 Completed - Personal Best so far!

I ran San Francisco Half Marathon 2009 yesterday and here are the results:



I'm excited about the results because improved my timing by almost 3 minutes. And running on Golden Gate Bridge is always a great experience. As always, the race was very well organized starting from expo to bib/tee-shirt distribution, well marked course, water and medical stations, local community support, buses from half marathon finish line to start line and every thing else. A few possible improvements are listed below.

I saw Dean Karnazes (50/50/50 marathon man) and met Bart Yasso (Yasso 800 man) in the Expo. There is certainly a wealth of knowledge to pick up from these elite runners.

1. Really, really, really qualify runners in Wave 1. Ask them for a qualifying time from a previous race or something. Walkers and 10-minute milers are NOT Wave 1.
2. Separate the course going on/off the Golden Gate Bridge, not just with orange cones, but with an additional rope. Otherwise slower runners spill over on the other side and almost bumping into the faster runners.
3. The expo hall had a wonderful set of exhibitors but it became really crowded as the day progressed. Either an alternate location or back to Market/Embaracdero next year is a better option.

1. Run a half-marathon with 7ish pace
2. Qualify for Boston - probably next year

Posted by Arun Gupta in Running  |  Comments[3]

Running Pet Peeves - Running San Francisco Marathon 2009 First 1/2

I've been running for many many years now and got into long distance running 4 years ago. Just love outdoor running and use treadmill for speed workouts and hills. Treadmill is a very predictable environment and allows you to focus on particular aspects of training. Most of my workouts are in the neighborhood and I generally try to run on business trips. As much as I enjoy running, I have my share of pet peeves experienced over these past years.

1. Leashed dog who are wandering multiple feet away from the owners and certainly all the unleashed dogs chasing/barking people in public areas.
2. Abreast walkers on the trail not willing to give up way for the runners coming behind. They just look behind and continue walking at 2 miles/hour.
3. All the more weird, walkers abreast on the trail not willing to give up way for runners coming from front.
4. Group runners who run abreast, love to chat and don't yield to other runners.
5. Hikers who move to right when you say "right" coming from behind ... ouch!
6. Drivers yapping on their phone, not paying any attention to oncoming traffic and especially to pedestrian/walkers/runners.
7. Another similar one, drivers unwilling to yield on unprotected right turn for walkers/runners with right of way.
8. In races, runners (more like fast walkers) who sign up for Wave 1 and 2 where as they should really be Wave 6 or 7. They just cause extra traffic for faster runners.
9. In races again, right before or after the start the runners who take a deviation start peeing off anywhere they like ... yuck! Have seen it all the times in early morning races, especially San Francisco Marathon. I think one of the San Francisco Marathon photographers should shoot each runner's photo who is spoiling the bay with their dump and then publish them.
10. Walkers/runners who just stop to fix a shoe lace or itch or something else without bothering to check if there is somebody coming fast behind them.
11. Runners who expect a return "hello/hi" from you when you are totally focused on getting that last stretch completed.

Posted by Arun Gupta in Running  |  Comments[4]

Are you using GlassFish ? - Let us know!

Are you using GlassFish for development, deployment/production, testing, teaching or in other interesting ways ? Help us fill out this short survey so we understand you better. The survey will not take more than 5-10 minutes of your time. blogs.sun.com/stories has a partial list of production deployments of GlassFish. Send us an email at stories@sun.com if you are using GlassFish in production.

Posted by Arun Gupta in General  |  Comments[2]

FISL 2009 Speaker Certificate

Received a "certificate of attendance as speaker" for recently concluded FISL 10.



This is sweet, thanks FISL organizers! It certainly adds a personal touch to the whole experience.

I don't remember receiving a personal certificate like this :)

Technorati: conf fisl brazil glassfish netbeans mysql eclipse

Posted by Arun Gupta in General  |  Comments[3]

Rails on GlassFish - "most performant of all", "simpler and just works", "blazing speed"

Here are some quotes about running Rails applications on GlassFish from user@jruby mailing list:

I find the glassfish gem to be the most performant of all -- and I don't need to war-up my app.

I also have some mongrel cluster stuff, but glassfish is simpler and just works.

Voila...blazing speed, can handle lots of traffic. Note that I am also cominging into apache from a dyndns name. So, whatever IP I have, I can go straight to execution on the glassfish gem and NO warring up! What could be easier deployment, or a faster execution?

It's running fantasticly and performing like nothing I've seen before :) Completely stable memory, no wirings or anything bad for 5 days now.. (with several ab/htperf stresstests).

It's always exciting to get good endorsements of our efforts in the GlassFish team :)

Other similar stories for using Rails/GlassFish in production are described at rubyonrails+stories.

Technorati: glassfish v3 gem rubyonrails stories jruby

Posted by Arun Gupta in web2.0  |  Comments[3]

Running Streak in Q2 2009 - 378.5 miles, 77/91 days of running

Continued from Q1 2009 running streak, here is a summary of Q2 (Apr 1 - Jun 30) 2009 running:

Posted by Arun Gupta in Running  |  Comments[0]