GlassFish Webtier

GlassFish v3 provides a REST interface to management and monitoring information as discussed in TOTD #96. As mentioned in that blog "the REST interface is a lower level API that enables toolkit developers and IT administrators to write their custom scripts/clients using language of their choice". This blog introduces a tool that uses the REST API to provide management and monitoring of GlassFish v3 and is written using JavaFX.

This tool is only a proof-of-concept that demonstrates that GlassFish v3 REST interface is functionally very rich and can indeed be used to write third-party administration tools. The tool uses a subset of the REST interface and exposes only a limited amount of management and monitoring capabilities otherwise exposed. After all this is a proof-of-concept :-)

A screencast of this tool in action along with a downloadable JNLP version will soon be available. For now, here is a snapshot of the main window of this tool:

The main screen allows you to enter a URL for the GlassFish administration. Then the GlassFish instance can be stopped/restarted from the main window using the buttons on top right. There is an animation at the bottom of the screen where the glassfish is swimming in the ocean and is directly related to the state of server running in the background. If the server is running, the animation works. If the server is not running then the animation stops as well.

The main screen has three main buttons:

  • "List Applications" - list all the applications deployed on the running instance
  • "Show Monitoring Levels" - show/Update all the monitoring levels
  • "Server Stats" - show statistics of the running server

Clicking on "List Applications" shows the list of applications deployed on this particular instance. Here is how a snapshot looks like for an instance running on my localhost at port 4848:

As shown in the screen, it shows a radio-bulleted list of all the applications. Each bullet is also accompanied by an image indicating the type of application - Web or Rails for now. Select the application and click on "Monitor" button to monitor that particular application. The REST API exposes a vast amount of monitoring data but a subset of monitoring data is displayed for Web and Rails application for now. Here is a snapshot of the monitoring data published for a Web application:

As evident by the list of engines, this web application has EJBs bundled as well. It also shows total number of Servlets/JSPs loaded, number of requests made to this web application and some other monitoring data.

Here is a snapshot of the monitoring data published for a Rails application:

It shows number of JRuby runtimes configured for the application, number of requests sent to the application, number of responses with different HTTP access codes and some other data.

The monitoring levels of different containers can be easily updated by clicking on "Show Monitoring Levels" as shown below:

And finally some server statistics are shown by clicking on "Server Stats" as shown below:

It shows when the server was started, host/port information, version and finally how long the server has been running for. The dials are an animation that shows the server up time.

Here are other related JavaFX and GlassFish related blogs published earlier:

How are you going to use the REST interface exposed by GlassFish v3 in your environment ?

Are you using JavaFX with GlassFish together in any way ?

Leave a comment on this blog if you do!

Technorati: javafx glassfish v3 rest web jruby rubyonrails rest administration monitoring management

In May 2009, I discussed the Servlet 3.0 security annotations in one of my blogs, Servlet 3.0 Security Annotations. At that time, the annotations were defined similar to those in EJB. During the discussion in JSR 315 expert group, two issues were identified as follows:
  1. In JSR 250, type level annotations only apply to methods declared in that class, not those inherited. This is an issue for servlets as they extend javax.servlet.http.HttpServlet.
  2. The doGet method et al may not correspond to http method GET et al as the logic can be overrided in service method of the servlet.

Thanks to Ronald Monzilo for discussions in Servlet 3.0 security. The following is the update on Servlet 3.0 security annotations:

  • As in servlet 2.5, @DenyAll, @PermitAll, @RolesAllowed will not apply to servlets. @TransportProtected will not be added to JSR 250.
  • The following new annotations will be added to javax.servlet.annotation:
    • ServletSecurity
    • HttpConstraint
    • HttpMethodConstraint
    Note that @ServletSecurity is a type level annotation and the rests are used as parameters in @ServletSecurity.
  • With the above new annotations, one can resolve the issue mentioned above. In addition, it covers the new use case where one want to have security constraint for extended http methods only, for instance FOO.

In this blog, I will illustrate how those annotation work. For convenient of readers of my previous blogs, I will first illustrate the four scenarios mentioned in my previous blog, Servlet 3.0 Security Annotations with the new annotations. Then I have an additional example.

Example 1: For all Http Methods

@WebServlet("/myurl")
@ServletSecurity(@HttpConstraint(rolesAllowed={"javaee"}))
public class TestServlet extends HttpServlet {
    ...
}

In this case, all http methods are protected and accessible only by users with role javaee.

Example 2: Http Method Level

@WebServlet("/myurl")
@ServletSecurity(httpMethodConstraints={ @HttpMethodConstraint("GET"),
    @HttpMethodConstraint(value="POST", rolesAllowed={"javaee"}),
    @HttpMethodConstraint(value="TRACE", emptyRoleSemantic=ServletSecurity.EmptyRoleSemantic.DENY) })
public class TestServlet extends HttpServlet {
    protected void doGet(HttpServletRequest req, HttpServletResponse res)
            throws IOException, ServletException {
        ...
    }

    protected void doPost(HttpServletRequest req, HttpServletResponse res)
            throws IOException, ServletException {
        ...
    }

    protected void doTrace(HttpServletRequest req, HttpServletResponse res)
            throws IOException, ServletException {
        ...
    }
}

The behaviors of the above servlet can be summarized as follows:

Http methodBehavior
GETall can access GET method
POSTonly authenticated users with role javaee can access POST method
TRACEno one can access TRACE method

Example 3: A General Constraint for all Http methods with some Exceptional Cases

@WebServlet("/myurl")
@ServletSecurity(value=@HttpConstraint(rolesAllowed={"javaee"}),
    httpMethodConstraints={ @HttpMethodConstraint(value="POST", rolesAllowed={"staff"}),
    @HttpMethodConstraint("TRACE") })
public class TestServlet extends HttpServlet {
    ...

    protected void doPost(HttpServletRequest req, HttpServletResponse res)
            throws IOException, ServletException {
        ...
    }

    protected void doTrace(HttpServletRequest req, HttpServletResponse res)
            throws IOException, ServletException {
        ...
    }
}

The behaviors of the above servlet can be summarized as follows:

Http methodBehavior
POSTonly authenticated users with role staff can access POST method
TRACEall can access TRACE method
methods other than POST and TRACEonly authenticated users with role javaee can access
Note that in the previous definitions, the exceptional cases must be the standard http methods. There is no such restriction for the new annotations as illustrated by the Example 5 below.

Example 4: Https and protected for a given role

@WebServlet("/myurl")
@ServletSecurity(value=@HttpConstraint(
    transportGuarantee=ServletSecurity.TransportGuarantee.CONFIDENTIAL),
    httpMethodConstraints={ @HttpMethodConstraint(value="TRACE", transportGuarantee=ServletSecurity.TransportGuarantee.NONE, rolesAllowed={"javaee"}) })
public class TestServlet extends HttpServlet {
    ...

    protected void doTrace(HttpServletRequest req, HttpServletResponse res)
        throws IOException, ServletException {

        ...
    }
}

The behaviors of the above servlet can be summarized as follows:

Http methodBehavior
TRACEHttps is supported. It just is not required. Only authenticated users with role javaee can access TRACE method
methods other than TRACErequire https

Example 5: Protect FOO only

@WebServlet("/myurl")
@ServletSecurity(value=@HttpConstraint,
    httpMethodConstraints={ @HttpMethodConstraint(value="FOO", rolesAllowed={"javaee"}) })
public class TestServlet extends HttpServlet {
    ...
}

The behaviors of the above servlet can be summarized as follows:

Http methodBehavior
FOOonly authenticated users with role staff can access POST method
methods other than FOOall can access

Mojarra 2.0.0 is now available!

There are several ways to obtain the release. 

Please review the release notes as there are important details there pertaining to differences between the implementation and the specification as well as a basic migration guide from 1.2 to 2.0 (note that this is a live document, so we'll be making additions - check back regularly).

The JSF 2.0 tutorial from our Sun documentation team should be available in the coming weeks.  As soon as it is, we'll send out a notification.  Until then, here are some nice resources for JSF 2.0:

On the tools+JSF 2.0 front, NetBeans is well underway with the JSF 2.0 support.  I'd recommend grabbing the NetBeans development build and try it out!  Ed noted the other day that you could highlight a section of markup in a Facelet template and extract it into a composite component.  Slick!  The JetBrains guys have been busy as well.  Check out their blog on JSF 2.0 support within Maia.

I'd like to personally thank all of our external contributors who have been committing code to the repository directly or submitting patches to help improve our quality (these are in no particular order - my apologies if I've missed anyone):

  • Guy Veraghtert
  • Imre Oßwald
  • Ted Goddard
  • Mark Collette
  • Dan Allen
  • Alexandr Smirnov
  • Martin Marinschek
  • Michael Kurz
  • Andy Schwartz

I'd also like to thank our top three issue reporters for taking the time to log issues (again, in no particular order)

  • Frank Hofmann
  • Guy Veraghtert
  • Juergen Zimmerman

Also, thanks to Ed Burns, Roger Kitain, Jim Driscoll, and Doug Donahue for putting up with me for the past two years while we worked on this project :)

Finally, if you'd like to discuss JSF 2.0 with other users, I'd recommend the following:

The GlassFish Webtier forums are monitored by the Mojarra developers.   The IRC channel, also, is frequented by the Mojarra developers, as well as folks from Exadel, MyFaces, and consumers of JSF as a technology.  It's a great way to interact with the community.

I'm excited that we've reached this stage and am looking forward to hearing/reading about people's experiences with JSF 2.0!

TOTD #110 explained how to create a brand new Rails application using Oracle database and run it using GlassFish v Gem. This Tip Of The Day explains how to create a scaffold for a sample schema that ships with Oracle database. Even though Rails Scaffold are good for, well, scaffolding but they do get you started easily. This blog will use the sample HR schema that comes along with Oracle database.

Lets get started!

  1. Copy the reverse_scaffold script in the "script" directory of your application created in TOTD #110. This script generates Model and Forms from a pre-existing database table. More details about this script are here.
  2. Edit "config/database.yml" and change the "development" section to:

    development:
    adapter: oracle_enhanced
    host: localhost
    database: orcl
    username: hr
    password: hr


    The changes are highlighted in bold, only the username and password values are changed to reflect the default values used with the sample database.
  3. Generate the models and forms for "departments" table as:
    ~/samples/v3/rails/oracle/bookstore >~/tools/jruby/bin/jruby script/reverse_scaffold departments department
    JRuby limited openssl loaded. gem install jruby-openssl for full support.
    http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
    JRuby limited openssl loaded. gem install jruby-openssl for full support.
    http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
     exists app/models/
     exists app/controllers/
     exists app/helpers/
     create app/views/departments
     exists app/views/layouts/
     exists test/functional/
     exists test/unit/
     create test/unit/helpers/
     exists public/stylesheets/
     create app/views/departments/index.html.erb
     create app/views/departments/show.html.erb
     create app/views/departments/new.html.erb
     create app/views/departments/edit.html.erb
     create app/views/layouts/departments.html.erb
     create public/stylesheets/scaffold.css
     create app/controllers/departments_controller.rb
     create test/functional/departments_controller_test.rb
     create app/helpers/departments_helper.rb
     create test/unit/helpers/departments_helper_test.rb
     route map.resources :departments
     dependency model
     exists app/models/
     exists test/unit/
     exists test/fixtures/
     create app/models/department.rb
     create test/unit/department_test.rb
     create test/fixtures/departments.yml
    
  4. Edit "app/models/department.rb" and specify the primary key to "department_id" column by adding:
    set_primary_key "department_id"
    

  5. Run the application as:
    ~/samples/v3/rails/oracle/bookstore >~/tools/jruby/bin/jruby -S glassfish -l
    Starting GlassFish server at: 129.145.133.197:3000 in development environment...
    Writing log messages to: /Users/arungupta/samples/v3/rails/oracle/bookstore/log/development.log.
    Press Ctrl+C to stop.
    Oct 6, 2009 2:14:19 PM com.sun.enterprise.v3.services.impl.GrizzlyProxy start
    INFO: Listening on port 3000
    
    . . .
    

    The application is now accessible at "http://localhost:3000/departments" and looks like:
  6. Similarly, create the model and forms for "employees" table as:

    ~/samples/v3/rails/oracle/bookstore >~/tools/jruby/bin/jruby script/reverse_scaffold employees employee
    JRuby limited openssl loaded. gem install jruby-openssl for full support.
    http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
    JRuby limited openssl loaded. gem install jruby-openssl for full support.
    http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
     exists app/models/
     exists app/controllers/
     exists app/helpers/
     create app/views/employees
     exists app/views/layouts/
     exists test/functional/
     exists test/unit/
     exists test/unit/helpers/
     exists public/stylesheets/
     create app/views/employees/index.html.erb
     create app/views/employees/show.html.erb
     create app/views/employees/new.html.erb
     create app/views/employees/edit.html.erb
     create app/views/layouts/employees.html.erb
     identical public/stylesheets/scaffold.css
     create app/controllers/employees_controller.rb
     create test/functional/employees_controller_test.rb
     create app/helpers/employees_helper.rb
     create test/unit/helpers/employees_helper_test.rb
     route map.resources :employees
     dependency model
     exists app/models/
     exists test/unit/
     exists test/fixtures/
     create app/models/employee.rb
     create test/unit/employee_test.rb
     create test/fixtures/employees.yml
    

    Specify the primary key to "employee_id" by adding the following to "app/models/employee.rb" as:
    set_primary_key "employee_id"
    

    The scaffolded table is now available at "http://localhost:3000/employees" and looks like:

So we created a simple Rails CRUD application accessing information from a pre-existing table in the Oracle database server.

Thanks to @mediachk for all the help!

A complete archive of all the TOTDs is available here. The complete list of Rails blog entries are available here.

This and other similar applications will be demonstrated at the upcoming Oracle Open World.

Technorati: totd oracle database glassfish v3 jruby rails oow

GlassFish v3 is the Reference Implementation for Java EE 6. Following the "extensibility" principle of Java EE 6, it also allows Ruby-on-Rails, Groovy and Grails and Python/Django applications to be seamlessly deployed as well, without any additional packaging. This blog has published multiple entries on deploying a Rails application on GlassFish as given below:

  • TOTD #105: Monitor Rails application using JavaScript
  • TOTD #104: Redmine, Typo, Substruct on GlassFish v3
  • TOTD #84: Apache + mod_proxy_balancer to load balance Rails applications on GlassFish
  • TOTD #81: nginx to load balance Rails applications on GlassFish Gem
  • TOTD #73: Deploying Rails application as WAR on GlassFish v2.1
  • TOTD #72: Deploying Rails application on GlassFish v3
  • TOTD #70: Deploying Rails application on GlassFish Gem

All the existing applications have used JavaDB, SQLite3, or MySQL as the database so far. In the process of getting ready for the upcoming Oracle Open World 2009, this Tip Of The Day will show how to use an Oracle database with a JRuby-on-Rails application deployed on GlassFish v3.

Lets get started!

  1. Install Oracle database as explained in TOTD #106.
  2. Configure JRuby/Rails in GlassFish v3 using one of the mechanisms explained in TOTD #104. Alternatively you can also install the GlassFish gem as:
    >./bin/jruby -S gem install glassfish
    JRuby limited openssl loaded. gem install jruby-openssl for full support.
    http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
    Successfully installed rack-1.0.0
    Successfully installed glassfish-0.9.5-universal-java
    2 gems installed
    Installing ri documentation for rack-1.0.0...
    Installing ri documentation for glassfish-0.9.5-universal-java...
    Installing RDoc documentation for rack-1.0.0...
    Installing RDoc documentation for glassfish-0.9.5-universal-java...
    

    This blog will use GlassFish Gem for running the application described below.
  3. Create a new database user and grant rights using SQL*Plus as shown:
    Macintosh-187:~ oracle$ sqlplus "/ as sysdba"
    SQL*Plus: Release 10.2.0.4.0 - Production on Thu Oct 1 12:32:33 2009
    
    Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.
    
    
    Connected to:
    Oracle Database 10g Release 10.2.0.4.0 - Production
    
    SQL> CREATE USER glassfish IDENTIFIED BY glassfish DEFAULT tablespace users TEMPORARY tablespace temp;
    
    User created.
    
    SQL> GRANT CONNECT TO glassfish IDENTIFIED BY glassfish;
    
    Grant succeeded.
    
    SQL> GRANT UNLIMITED TABLESPACE TO glassfish;
    
    Grant succeeded.
    
    SQL> GRANT CREATE TABLE TO glassfish;
    
    Grant succeeded.
    
    SQL> GRANT CREATE SEQUENCE TO glassfish;
    
    Grant succeeded.
    SQL> exit
    Disconnected from Oracle Database 10g Release 10.2.0.4.0 - Production
    
    
    The user name and password are chosen as "glassfish" for simplicity. This is not a recommended setting for production usage though.
  4. Copy Oracle JDBC drivers (odjc6.jar) in JRUBY_HOME/lib directory.
  5. Create a simple Rails application
    1. Make sure the following gems are pre-installed:
      rails (2.3.4)
      activerecord-jdbc-adapter (0.9.2)
      glassfish (0.9.5)
      

      If not, then install them as:
      jruby -S gem install rails activercord-jdbc-adapter glassfish
      
    2. Create a simple Rails application as:
      jruby -S rails bookstore -d oracle
      

    3. Using the normal "jdbc" adapter will give the following error later:

      ActionView::TemplateError (book_url failed to generate from {:controller=>"books", :action=>"show", :id=>#<Book id: #<BigDecimal:3feef1eb,'10000.0',1(8)>, title: "Ultramarathon Man", author: "Dean Karnazes", created_at: "2009-10-06 00:03:14", updated_at: "2009-10-06 00:03:14">}, expected: {:controller=>"books", :action=>"show"}, diff: {:id=>#<Book id: #<BigDecimal:459bdb65,'10000.0',1(8)>, title: "Ultramarathon Man", author: "Dean Karnazes", created_at: "2009-10-06 00:03:14", updated_at: "2009-10-06 00:03:14">}) on line #13 of app/views/books/index.html.erb:
      


      As evident, the "id" column is returned as BigDecimal where as it should be integer. Fortunately the fix is simple, install the "oracle_enhanced_adapter" (docs) as:

      bookstore >~/tools/jruby/bin/jruby -S gem install activerecord-oracle_enhanced-adapter
      JRuby limited openssl loaded. gem install jruby-openssl for full support.
      http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
      Successfully installed activerecord-oracle_enhanced-adapter-1.2.2
      1 gem installed
      Installing ri documentation for activerecord-oracle_enhanced-adapter-1.2.2...
      Installing RDoc documentation for activerecord-oracle_enhanced-adapter-1.2.2...
      

      Using this "enhanced adapter" is highly recommended for connecting with Oracle databases from Rails applications.
    4. Edit "config/database.yml" and change the "development" section to:
      development:
       adapter: oracle_enhanced
       host: localhost
       database: orcl
       username: glassfish
       password: glassfish
      

      Notice, the username and password values are the same as chosen in the SQL statements above.
    5. Generate a scaffold as:

      bookstore >~/tools/jruby/bin/jruby script/generate scaffold book title:string author:string
      JRuby limited openssl loaded. gem install jruby-openssl for full support.
      http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
       exists app/models/
       exists app/controllers/
       exists app/helpers/
       create app/views/books
       exists app/views/layouts/
       exists test/functional/
       exists test/unit/
       create test/unit/helpers/
       exists public/stylesheets/
       create app/views/books/index.html.erb
       create app/views/books/show.html.erb
       create app/views/books/new.html.erb
       create app/views/books/edit.html.erb
       create app/views/layouts/books.html.erb
       create public/stylesheets/scaffold.css
       create app/controllers/books_controller.rb
       create test/functional/books_controller_test.rb
       create app/helpers/books_helper.rb
       create test/unit/helpers/books_helper_test.rb
       route map.resources :books
       dependency model
       exists app/models/
       exists test/unit/
       exists test/fixtures/
       create app/models/book.rb
       create test/unit/book_test.rb
       create test/fixtures/books.yml
       create db/migrate
       create db/migrate/20091005233152_create_books.rb
      
      
    6. Prepare your application for JDBC as:
      bookstore >~/tools/jruby/bin/jruby script/generate jdbc
      JRuby limited openssl loaded. gem install jruby-openssl for full support.
      http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
       exists config/initializers
       create config/initializers/jdbc.rb
       exists lib/tasks
       create lib/tasks/jdbc.rake
      

    7. Migrate the database as:
      ~/samples/v3/rails/oracle/bookstore >~/tools/jruby/bin/jruby -S rake db:migrate
      (in /Users/arungupta/samples/v3/rails/oracle/bookstore)
      == CreateBooks: migrating ====================================================
      -- create_table(:books)
       -> 0.0740s
       -> 0 rows
      == CreateBooks: migrated (0.0750s) ===========================================
      

  6. Lets run the application as:
    ~/samples/v3/rails/oracle/bookstore >~/tools/jruby/bin/jruby -S glassfish -l
    Starting GlassFish server at: 129.145.133.197:3000 in development environment...
    Writing log messages to: /Users/arungupta/samples/v3/rails/oracle/bookstore/log/development.log.
    Press Ctrl+C to stop.
    Oct 6, 2009 9:45:51 AM com.sun.enterprise.v3.services.impl.GrizzlyProxy start
    INFO: Listening on port 3000
    
    . . .
    


    he application is now accessible at "http://localhost:3000/books" and looks like:



    Click on "New Book" and enter the values as shown:



    Click on "Create" to see the output as:



    Click on "Back" to see the main page as:



    After adding another book, this page looks like:



    And another book ...



So we created a brand new JRuby/Rails application and ran it using GlassFish and Oracle backend. A subsequent blog entry will show how to create a similar application using an existing database.

A complete archive of all the TOTDs is available here. The complete list of Rails blog entries are available here.

This and other similar applications will be demonstrated at the upcoming Oracle Open World.

Technorati: totd oracle database glassfish v3 jruby rails oow

Monitoring infrastructure in GlassFish v3 is getting an extreme makeover. Prashanth defines it very nicely in his detailed introduction:

We provide a way to dynamically and non-intrusively generate monitoring events from any of the GlassFish runtime classes, the ability to listen to these events, collect the statistics and expose these statistics through various standard clients.

The "dynamic" nature indicates that monitoring can be turned ON or OFF in a GlassFish instance running in production environment. It also means the granularity to which the monitoring information can be generated. This information can be generated for not only a traditional Java EE applications, but Rails, Django and other type of applications that can be easily deployed on GlassFish v3. And that is extensible for other pluggable containers too. The data can be accessed using multiple mechanisms providing the administrator a wide variety of choice for tools, e.g. DTrace, JMX, REST, asadmin CLI, and Admin Console and thus another point in favor of "dynamic".

The "non-intrusive" behavior means that monitoring can be used in production environment with minimal overhead. It also means that there is no overhead when monitoring is not enabled. Anyway, monitoring needs to be explicitly enabled as explained below.

As mentioned above, there are multiple ways to access the monitoring data. The different ways to access the monitoring data are:

  1. DTrace scripts (only on Solaris)
  2. asadmin CLI
  3. Admin Console
  4. JMX/jConsole
  5. REST
  6. Custom client using a 3rd party scripting language (available as value-add feature to paid customers only)

This Tip Of The Day will describe how to access the monitoring data using asadmin CLI and a JavaScript client. Note that the JavaScript client feature is available as a value-add to the community version of GlassFish and available only to the paid customers.

This tip will use a pre-deployed Rails application as (Redmine as described in TOTD #104) on a nightly GlassFish v3 build (CI, nightly, or promoted) and explains how to monitor this application.

Using the terminology defined in Monitoring in GlassFish v3 blog, the JRuby subsystem in GlassFish has multiple probe providers and each provider has multiple probes. The JRuby subsystem also provides multiple stats providers with probe listeners. All of these elements are linked using the monitoring infrastructure in GlassFish.

Lets monitor our Rails application

Monitoring using asadmin CLI

By default the monitoring is turned OFF for all the components. Lets enable monitoring for the JRuby container as:

asadmin enable-monitoring --level jruby-container=HIGH

The other possible values are "LOW" and "OFF". All the probes publishing monitoring data can be listed as:

~/tools/glassfish/v3/9-18/glassfishv3 >./bin/asadmin list --monitor=true "*"
server
server.containers
server.containers.jruby
server.containers.jruby.applications
server.containers.jruby.http
server.containers.jruby.http.redmine-0.8.5
server.containers.jruby.runtime-pool
server.containers.jruby.runtime-pool.redmine-0.8.5

Command list executed successfully.

A snapshot of the monitoring data can be obtained as:

~/tools/glassfish/v3/9-18/glassfishv3 >./bin/asadmin get --monitor=true "*jruby*"
server.containers.jruby.applications.activerubyapplications.redmine-0.8.5-appName = redmine-0.8.5
server.containers.jruby.applications.activerubyapplications.redmine-0.8.5-description =
 server.containers.jruby.applications.activerubyapplications.redmine-0.8.5-environment = development
server.containers.jruby.applications.activerubyapplications.redmine-0.8.5-jrubyVersion = 1.3.0
server.containers.jruby.applications.activerubyapplications.redmine-0.8.5-lastsampletime = 1253322280437
server.containers.jruby.applications.activerubyapplications.redmine-0.8.5-name = redmine-0.8.5
server.containers.jruby.applications.activerubyapplications.redmine-0.8.5-rubyFramework = rails
server.containers.jruby.applications.activerubyapplications.redmine-0.8.5-starttime = 1253322280437
server.containers.jruby.applications.activerubyapplications.redmine-0.8.5-unit =
server.containers.jruby.applications.activerubyappscount-count = 1
server.containers.jruby.applications.activerubyappscount-description = Number of currently loaded Ruby applications
server.containers.jruby.applications.activerubyappscount-lastsampletime = 1253322279921
server.containers.jruby.applications.activerubyappscount-name = ActiveRubyApplications
server.containers.jruby.applications.activerubyappscount-starttime = 1253322279922
server.containers.jruby.applications.activerubyappscount-unit = count
server.containers.jruby.http.redmine-0.8.5.address = null
server.containers.jruby.http.redmine-0.8.5.averageprocessingtime = 0
server.containers.jruby.http.redmine-0.8.5.count200-count = 0
server.containers.jruby.http.redmine-0.8.5.count200-description = Number of responses with a status code equal to 200
server.containers.jruby.http.redmine-0.8.5.count200-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count200-name = Count200
server.containers.jruby.http.redmine-0.8.5.count200-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count200-unit = count
server.containers.jruby.http.redmine-0.8.5.count2xx-count = 0
server.containers.jruby.http.redmine-0.8.5.count2xx-description = Number of responses with a status code in the 2xx range
server.containers.jruby.http.redmine-0.8.5.count2xx-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count2xx-name = Count2xx
server.containers.jruby.http.redmine-0.8.5.count2xx-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count2xx-unit = count
server.containers.jruby.http.redmine-0.8.5.count302-count = 0
server.containers.jruby.http.redmine-0.8.5.count302-description = Number of responses with a status code equal to 302
server.containers.jruby.http.redmine-0.8.5.count302-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count302-name = Count302
server.containers.jruby.http.redmine-0.8.5.count302-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count302-unit = count
server.containers.jruby.http.redmine-0.8.5.count304-count = 0
server.containers.jruby.http.redmine-0.8.5.count304-description = Number of responses with a status code equal to 304
server.containers.jruby.http.redmine-0.8.5.count304-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count304-name = Count304
server.containers.jruby.http.redmine-0.8.5.count304-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count304-unit = count
server.containers.jruby.http.redmine-0.8.5.count3xx-count = 0
server.containers.jruby.http.redmine-0.8.5.count3xx-description = Number of responses with a status code in the 3xx range
server.containers.jruby.http.redmine-0.8.5.count3xx-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count3xx-name = Count3xx
server.containers.jruby.http.redmine-0.8.5.count3xx-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count3xx-unit = count
server.containers.jruby.http.redmine-0.8.5.count400-count = 0
server.containers.jruby.http.redmine-0.8.5.count400-description = Number of responses with a status code equal to 400
server.containers.jruby.http.redmine-0.8.5.count400-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count400-name = Count400
server.containers.jruby.http.redmine-0.8.5.count400-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count400-unit = count
server.containers.jruby.http.redmine-0.8.5.count401-count = 0
server.containers.jruby.http.redmine-0.8.5.count401-description = Number of responses with a status code equal to 401
server.containers.jruby.http.redmine-0.8.5.count401-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count401-name = Count401
server.containers.jruby.http.redmine-0.8.5.count401-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count401-unit = count
server.containers.jruby.http.redmine-0.8.5.count403-count = 0
server.containers.jruby.http.redmine-0.8.5.count403-description = Number of responses with a status code equal to 403
server.containers.jruby.http.redmine-0.8.5.count403-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count403-name = Count403
server.containers.jruby.http.redmine-0.8.5.count403-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count403-unit = count
server.containers.jruby.http.redmine-0.8.5.count404-count = 0
server.containers.jruby.http.redmine-0.8.5.count404-description = Number of responses with a status code equal to 404
server.containers.jruby.http.redmine-0.8.5.count404-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count404-name = Count404
server.containers.jruby.http.redmine-0.8.5.count404-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count404-unit = count
server.containers.jruby.http.redmine-0.8.5.count4xx-count = 0
server.containers.jruby.http.redmine-0.8.5.count4xx-description = Number of responses with a status code in the 4xx range
server.containers.jruby.http.redmine-0.8.5.count4xx-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count4xx-name = Count4xx
server.containers.jruby.http.redmine-0.8.5.count4xx-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count4xx-unit = count
server.containers.jruby.http.redmine-0.8.5.count503-count = 0
server.containers.jruby.http.redmine-0.8.5.count503-description = Number of responses with a status code equal to 503
server.containers.jruby.http.redmine-0.8.5.count503-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count503-name = Count503
server.containers.jruby.http.redmine-0.8.5.count503-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count503-unit = count
server.containers.jruby.http.redmine-0.8.5.count5xx-count = 0
server.containers.jruby.http.redmine-0.8.5.count5xx-description = Number of responses with a status code in the 5xx range
server.containers.jruby.http.redmine-0.8.5.count5xx-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count5xx-name = Count5xx
server.containers.jruby.http.redmine-0.8.5.count5xx-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.count5xx-unit = count
server.containers.jruby.http.redmine-0.8.5.countother-count = 0
server.containers.jruby.http.redmine-0.8.5.countother-description = Number of responses with other status codes
server.containers.jruby.http.redmine-0.8.5.countother-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.countother-name = CountOther
server.containers.jruby.http.redmine-0.8.5.countother-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.countother-unit = count
server.containers.jruby.http.redmine-0.8.5.errorcount-count = 0
server.containers.jruby.http.redmine-0.8.5.errorcount-description = Number of responses with a status code greater than 400
server.containers.jruby.http.redmine-0.8.5.errorcount-lastsampletime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.errorcount-name = ErrorCount
server.containers.jruby.http.redmine-0.8.5.errorcount-starttime = 1253322280245
server.containers.jruby.http.redmine-0.8.5.errorcount-unit = count
server.containers.jruby.http.redmine-0.8.5.requestcount-count = 0
server.containers.jruby.http.redmine-0.8.5.requestcount-description = Number of HTTP requests received
server.containers.jruby.http.redmine-0.8.5.requestcount-lastsampletime = 1253322280243
server.containers.jruby.http.redmine-0.8.5.requestcount-name = RequestCounter
server.containers.jruby.http.redmine-0.8.5.requestcount-starttime = 1253322280243
server.containers.jruby.http.redmine-0.8.5.requestcount-unit = count
server.containers.jruby.http.redmine-0.8.5.requestpersecond = null
server.containers.jruby.runtime-pool.redmine-0.8.5.activeruntimes-count = 1
server.containers.jruby.runtime-pool.redmine-0.8.5.activeruntimes-description = Currently active runtimes
server.containers.jruby.runtime-pool.redmine-0.8.5.activeruntimes-lastsampletime = 1253322280241
server.containers.jruby.runtime-pool.redmine-0.8.5.activeruntimes-name = activeRuntimes
server.containers.jruby.runtime-pool.redmine-0.8.5.activeruntimes-starttime = 1253322280241
server.containers.jruby.runtime-pool.redmine-0.8.5.activeruntimes-unit = count
server.containers.jruby.runtime-pool.redmine-0.8.5.applicationname = redmine-0.8.5
server.containers.jruby.runtime-pool.redmine-0.8.5.contextpath = /redmine-0.8.5
server.containers.jruby.runtime-pool.redmine-0.8.5.hardmaximum-count = 1
server.containers.jruby.runtime-pool.redmine-0.8.5.hardmaximum-description = Maximum active runtimes
server.containers.jruby.runtime-pool.redmine-0.8.5.hardmaximum-lastsampletime = 1253322280241
server.containers.jruby.runtime-pool.redmine-0.8.5.hardmaximum-name = hardMaximum
server.containers.jruby.runtime-pool.redmine-0.8.5.hardmaximum-starttime = 1253322280241
server.containers.jruby.runtime-pool.redmine-0.8.5.hardmaximum-unit = count
server.containers.jruby.runtime-pool.redmine-0.8.5.hardmminimum-count = 1
server.containers.jruby.runtime-pool.redmine-0.8.5.hardmminimum-description = Minimum active runtimes
server.containers.jruby.runtime-pool.redmine-0.8.5.hardmminimum-lastsampletime = 1253322280241
server.containers.jruby.runtime-pool.redmine-0.8.5.hardmminimum-name = hardMinimum
server.containers.jruby.runtime-pool.redmine-0.8.5.hardmminimum-starttime = 1253322280241
server.containers.jruby.runtime-pool.redmine-0.8.5.hardmminimum-unit = count

Command get executed successfully.

The command asadmin get --monitor=true "*jruby*" dumps a snapshot of the monitoring data such as the number of Ruby currently applications loaded, application name, JRuby version, environment (development / test / production), currently active runtimes, min/max runtimes, number of HTTP requests / responses with a certain HTTP code and much more information. It basically dumps all the JRuby monitoring information captured so far.

An alternate regular expression may be specified such as:

asadmin get --monitor=true "*jruby*runtime-pool*"

to gather only the runtime pool specific values.

Monitoring using JavaScript client

Third-party scripting client are a value-add to the community versions. Just like Enterprise Manager, the value-add will be available as a patch to the users who purchase commercial support. Lets see what can be done with it though.

First of all you can type the command "list-probes" to see a list of all the probes that are available. A typical output will look like:

~/tools/glassfish/v3/9-18/glassfishv3 >./bin/asadmin list-probes
glassfish:kernel:connections-keep-alive:decrementCountConnectionsEvent decrementCountConnectionsEvent(java.lang.String)
glassfish:web:web-module:webModuleStoppedEvent webModuleStoppedEvent(java.lang.String, java.lang.String)
glassfish:jca:connection-pool:connectionValidationFailedEvent connectionValidationFailedEvent(java.lang.String, int)
glassfish:jca:work-management:workWaitedFor workWaitedFor(java.lang.String, long)
glassfish:jdbc:connection-pool:connectionTimedOutEvent connectionTimedOutEvent(java.lang.String)
glassfish:security:ejbpolicy:ejbPCCreationEvent ejbPCCreationEvent(java.lang.String)
glassfish:kernel:thread-pool:threadReturnedToPoolEvent threadReturnedToPoolEvent(java.lang.String, java.lang.String)
glassfish:web:session:sessionPersistedEndEvent sessionPersistedEndEvent(java.lang.String, java.lang.String, java.lang.String)
glassfish:web:http-service:requestStartEvent requestStartEvent(java.lang.String, java.lang.String, java.lang.String, int, java.lang.String, java.lang.String)
glassfish:jdbc:connection-pool:connectionsFreedEvent connectionsFreedEvent(java.lang.String, int)
glassfish:jdbc:connection-pool:toString toString(java.lang.String, java.lang.StringBuffer)
glassfish:jca:connection-pool:decrementFreeConnectionsSizeEvent decrementFreeConnectionsSizeEvent(java.lang.String, int)
glassfish:kernel:connections-keep-alive:incrementCountFlushesEvent incrementCountFlushesEvent(java.lang.String)
glassfish:webservices:109:deploy deploy(com.sun.enterprise.deployment.Application, com.sun.enterprise.deployment.WebServiceEndpoint)
glassfish:jca:connection-pool:connectionAcquiredEvent connectionAcquiredEvent(java.lang.String)
glassfish:web:http-service:requestEndEvent requestEndEvent(java.lang.String, java.lang.String, java.lang.String, int, java.lang.String, java.lang.String, int)
glassfish:kernel:connections-keep-alive:incrementCountRefusalsEvent incrementCountRefusalsEvent(java.lang.String)
glassfish:kernel:connections:connectionConnectedEvent connectionConnectedEvent(java.lang.String, int)
glassfish:kernel:file-cache:addHeapSizeEvent addHeapSizeEvent(java.lang.String, long)
glassfish:jruby:runtime-pool:runtimePoolUpdateEvent runtimePoolUpdateEvent(java.lang.String, int, int, int, int, int)
glassfish:security:web:securityManagerCreationEvent securityManagerCreationEvent(java.lang.String)
glassfish:security:web:securityManagerDestructionEvent securityManagerDestructionEvent(java.lang.String)
glassfish:webservices:ri:undeploy undeploy(com.sun.xml.ws.transport.http.servlet.ServletAdapter)
glassfish:web:session:sessionPersistedStartEvent sessionPersistedStartEvent(java.lang.String, java.lang.String, java.lang.String)
glassfish:ejb:pool:objectAddedEvent ejbObjectAddedEvent()
glassfish:ejb:bean:methodStartEvent ejbMethodStartEvent(java.lang.String, java.lang.String, java.lang.String, java.lang.reflect.Method)
glassfish:jdbc:connection-pool:connectionRequestServedEvent connectionRequestServedEvent(java.lang.String, long)

All the JRuby probes can be easily listed as:

~/tools/glassfish/v3/9-18/glassfishv3 >./bin/asadmin list-probes | grep jruby
glassfish:jruby:runtime-pool:runtimePoolUpdateEvent runtimePoolUpdateEvent(java.lang.String, int, int, int, int, int)
glassfish:jruby:http:requestStartEvent requestStartEvent(java.lang.String, java.lang.String, int)
glassfish:jruby:jruby-container:jrubyModuleStartedEvent jrubyModuleStartedEvent(java.lang.String, java.lang.String, java.lang.String, java.lang.String)
glassfish:jruby:jruby-container:jrubyModuleStoppedEvent jrubyModuleStoppedEvent(java.lang.String, java.lang.String, java.lang.String)
glassfish:jruby:http:requestEndEvent requestEndEvent(java.lang.String, int)
glassfish:jruby:runtime-pool:runtimePoolStartEvent runtimePoolStartEvent(java.lang.String, int, int, int, int, int, int, int)

More detailed information about each probe can be easily found by giving the command:

~/tools/glassfish/v3/9-18/glassfishv3 >./bin/asadmin list-probes --manpage=true glassfish:jruby:runtime-pool:runtimePoolUpdateEvent

This will show the detailed information ("man" pages) about the specific probe. A JavaScript client to monitor the deployed Rails application and gather the relevant statistics can be written using these pages as shown below:

moduleStarted = function(appName, appType, env, jruby) {
    client.print( '\n log> Deployed a \'' + appType + '\' app named \'' + appName + '\' in \'' + env + '\' environment with JRuby \'' + jruby + '\'.');
}

moduleStopped = function(appName, appType, env) {
    client.print( '\n log> Undeployed a \'' + appType + '\' app named \'' + appName + '\' in \'' + env + '\' environment.');
}

requestStarted = function(contextPath, serverName, port) {
    client.print( '\n log> Request started at \'' + contextPath + '\' hosted on \'' + serverName + ':' + port + '\'');
}

requestEnded = function(contextPath, statusCode) {
    client.print( '\n log> Request stopped at \'' + contextPath + '\' with status code \'' + statusCode + '\'');
}

runtimePoolStart = function(appName, activeRuntimes, queueSize) {
   client.print( '\n log> JRuby runtime pool started for the app \'' + appName + '\': active runtime - ' + activeRuntimes + ', queue size - ' + queueSize);
}

runtimePoolUpdate = function(appName, activeRuntimes, queueSize) {
   client.print( '\n log> JRuby runtime pool updated for the app \'' + appName + '\': active runtime - ' + activeRuntimes + ', queue size - ' + queueSize);
}

moduleStartedParams = java.lang.reflect.Array.newInstance(java.lang.String, 4);
moduleStartedParams[0]="appName";
moduleStartedParams[1]="applicationType";
moduleStartedParams[2]="environment";
moduleStartedParams[3]="jrubyVersion";
scriptContainer.registerListener('glassfish:jruby:jruby-container:jrubyModuleStartedEvent', moduleStartedParams, 'moduleStarted');

moduleStoppedParams = java.lang.reflect.Array.newInstance(java.lang.String, 3);
moduleStoppedParams[0]="appName";
moduleStoppedParams[1]="applicationType";
moduleStoppedParams[2]="environment";
scriptContainer.registerListener('glassfish:jruby:jruby-container:jrubyModuleStoppedEvent', moduleStoppedParams, 'moduleStopped');

requestStartParams = java.lang.reflect.Array.newInstance(java.lang.String, 3);
requestStartParams[0]="contextPath";
requestStartParams[1]="serverName";
requestStartParams[2]="port";
scriptContainer.registerListener('glassfish:jruby:http:requestStartEvent', requestStartParams, 'requestStarted');

requestEndParams = java.lang.reflect.Array.newInstance(java.lang.String, 2);
requestEndParams[0]="contextPath";
requestEndParams[1]="statusCode";
scriptContainer.registerListener('glassfish:jruby:http:requestEndEvent', requestEndParams, 'requestEnded');

runtimePoolParams = java.lang.reflect.Array.newInstance(java.lang.String, 3);
runtimePoolParams[0]="appName";
runtimePoolParams[1]="activeRuntimes";
runtimePoolParams[2]="queueSize";
scriptContainer.registerListener('glassfish:jruby:runtime-pool:runtimePoolStartEvent', runtimePoolParams, 'runtimePoolStart');
scriptContainer.registerListener('glassfish:jruby:runtime-pool:runtimePoolUpdateEvent', runtimePoolParams, 'runtimePoolUpdate');

This script register listeners for different probe events, pass a set of parameters that need to be captured, and print the information in a callback method specified during registration. The number of listeners and parameters / listener may be altered to meet your data capturing needs.

This script is stored in a file "monitor-rails.js" and used as described below. As a Rails application is deployed, requests invoked, and undeployed, the following messages are printed on the console:

~/tools/glassfish/v3/9-18/glassfishv3 >./bin/asadmin run-script monitor-rails.js


 log> Deployed a 'rails' app named 'redmine-0.8.5' in 'development' environment with JRuby '1.3.0'.
 log> JRuby runtime pool started for the app 'redmine-0.8.5': active runtime - 1, queue size - 0
 log> Request started at '/redmine-0.8.5' hosted on 'localhost:8080'
 log> Request stopped at '/redmine-0.8.5' with status code '200'
 log> Request started at '/redmine-0.8.5' hosted on 'localhost:8080'
 log> Request stopped at '/redmine-0.8.5' with status code '200'
 log> Undeployed a 'rails' app named 'redmine-0.8.5' in 'development' environment.

Note "run-script" is the command that comes as part of the value-add. As described earlier, a snapshot of the monitoring information can be easily captured using asadmin as:

~/tools/glassfish/v3/9-18/glassfishv3 >./bin/asadmin get --monitor=true "*jruby*request*"
server.containers.jruby.http.redmine-0.8.5.requestcount-count = 2
server.containers.jruby.http.redmine-0.8.5.requestcount-description = Number of HTTP requests received
server.containers.jruby.http.redmine-0.8.5.requestcount-lastsampletime = 1253638362651
server.containers.jruby.http.redmine-0.8.5.requestcount-name = RequestCounter
server.containers.jruby.http.redmine-0.8.5.requestcount-starttime = 1253638362651
server.containers.jruby.http.redmine-0.8.5.requestcount-unit = count
server.containers.jruby.http.redmine-0.8.5.requestpersecond = 1

Command get executed successfully.

As you can see, the total number of requests is shown as "2".

Just for fun, I ran Apache ab with 20 requests and 4 concurrency ("-n 20 -c 4") on "http://localhost:8080/redmine-0.8.5" and saw the following results:

Monitoring OFF
(default)
Monitoring=HIGH
(no data printed)
Monitoring=HIGH
(data printed)
Time taken for requests (secs) 26.231 26.997 26.665
Requests per second 0.76 0.74 0.75
Time per request (ms) 1311.574 1349.859 1333.239


The server was restarted between each run. These numbers were generated on my development machine so they are most likely skewed. But as a development benchmark the numbers do indicate that GlassFish v3 monitoring is truly non-intrusive. The total time taken for requests, requests/second, and time/request is pretty much identical.

Future blogs will cover how to access this data using web-based DTrace scripts, web-based Admin Console, jConsole, and REST interface.

A complete archive of all the tips is available here.

Technorati: totd glassfish v3 monitoring asadmin javascript jruby rails redmine

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Technorati: glassfish rubyonrails jruby webinar

GlassFish v3 is opening up new frontiers by allowing to easily deploy Rails, Grails and Django applications, in addition to Java EE, without any additional packaging. You can even write a custom container to support new types of applications. Numerous entries on this blog have talked about how to deploy Rails applications on GlassFish v3. This Tip Of The Day (TOTD) will recap them and, once again, demonstrate how to easily get started with deploying some popular open source Rails applications on GlassFish v3.

Lets prepare a GlassFish v3 build for deploying Rails applications. This blog is going to use 9/16 nightly but you should pick the latest nightly or promoted.

  1. Unzip the downloaded bundle as:
    ~/tools/glassfish/v3/9-16 >unzip ~/Downloads/glassfish-v3-b64-09_16_2009.zip
  2. Configure JRuby/Rails in GlassFish v3 - JRuby/rails can be configured three different ways - use a previously installed JRuby/Rails directory, install JRuby/Rails module using the graphical Update Center or the "pkg" binary. This Update Center module comes packaged with JRuby 1.3.1, Rails 2.3.2 and some other useful gems. Pick the option you are most comfortable with and use it for your GlassFish installation.
    1. Configure previously installed JRuby/Rails directory as:
      ~/tools/glassfish/v3/9-16/glassfishv3/bin/asadmin create-jvm-options -Djruby.home=/Users/arungupta/tools/jruby
      Authentication failed with password from login store: /Users/arungupta/.asadminpass
      
      Enter admin password >
      created 1 option(s)
      Command create-jvm-options executed successfully.

      That's it!
    2. Install JRuby/Rails module using graphical Update Tool
      1. The graphical Update Tool tool can be invoked as:
        ~/tools/glassfish/v3/9-16/glassfishv3 >./bin/updatetool
        
        The software needed for this command (updatetool) is not installed.
        
        If you choose to install Update Tool, your system will be automatically
        configured to periodically check for software updates. If you would like
        to configure the tool to not check for updates, you can override the
        default behavior via the tool's Preferences facility.
        
        When this tool interacts with package repositories, some system information
        such as your system's IP address and operating system type and version
        is sent to the repository server. For more information please see:
        
        http://wiki.updatecenter.java.net/Wiki.jsp?page=UsageMetricsUC2
        
        Once installation is complete you may re-run this command.
        
        Would you like to install Update Tool now (y/n): y
        
        Proxy: Using system proxy settings.
        Install image: /Users/arungupta/tools/glassfish/v3/9-16/glassfishv3
        Installing pkg packages.
        Installing updatetool packages.
        Registering notifier: Already registered.
        Initialization complete.
        
        Software successfully installed. You may now re-run this command (updatetool).
      2. The first invocation of the command installs the Update Tool and the second invocation shows the following screen after "JRuby on GlassFish" module is selected:


        Click on green button in the top left to install the module and it picks up the dependencies as well as shown below:


        Click on "Install" to start the installation and click on "Accept" to accept the license.
      3. Close the Update Tool window once the installation is completed. The module creates "glassfish/jruby" directory.
    3. Install JRuby/Rails module using "pkg" binary
      1. Install the JRuby/Rails bits using the "pkg" binary. Invoke the command as:
        ~/tools/glassfish/v3/9-16/glassfishv3 >./bin/pkg

        The software needed for this command (pkg) is not installed. When this tool interacts with package repositories, some system information such as your system's IP address and operating system type and version is sent to the repository server. For more information please see: http://wiki.updatecenter.java.net/Wiki.jsp?page=UsageMetricsUC2 Once installation is complete you may re-run this command. Would you like to install this software now (y/n): y Proxy: Using system proxy settings. Install image: /Users/arungupta/tools/glassfish/v3/9-16/glassfishv3 Installing pkg packages. Initialization complete. Software successfully installed. You may now re-run this command (pkg).
      2. The command "pkg list -a" shows all the modules available for installation and the output looks like:

        ~/tools/glassfish/v3/9-16/glassfishv3 >./bin/pkg list -a
        NAME (PUBLISHER)                              VERSION         STATE      UFIX
        ant (contrib.glassfish.org)                   1.7.1-0.6       known      ----
        felix                                         2.0.0-0         installed  ----
        glassfish-appclient                           3.0-65          installed  ----
        glassfish-cmp                                 3.0-65          installed  ----
        
        . . .
        
        jersey-docs-and-examples                      1.1.2-1.0       known      ----
        jmaki (contrib.glassfish.org)                 1.8.1-2.0       known      ----
        jruby                                         1.3.1-1.1       known      ----
        jruby (contrib.glassfish.org)                 1.2.0-1.1       known      u---
        jruby-gems (contrib.glassfish.org)            2.3.2-1.1       known      ----
        jython-container (contrib.glassfish.org)      0.5.3-1.0       known      ----
        jython-runtime (contrib.glassfish.org)        2.5.0-1.0       known      ----
        metro                                         2.0-19          installed  ----
        
        . . .
        
        updatetool                                    2.3.0-36.2403   known      ----
        updatetool (contrib.glassfish.org)            2.2.2-30.2311   known      u---
        wxpython2.8-minimal                           2.8.10.1-36.2403 known      ----
        wxpython2.8-minimal (contrib.glassfish.org)   2.8.8-30.2311   known      u---
      3. Start the installation of "jruby" module as:

        ~/tools/glassfish/v3/9-17/glassfishv3 >./bin/pkg install jruby
        DOWNLOAD                                  PKGS       FILES    XFER (MB)
        Completed                                  2/2 14810/14810    37.0/37.0
        
        PHASE                                        ACTIONS
        Install Phase                            17273/17273
  3. Redmine on GlassFish - Redmine is an open source project management web application. The simplified steps to deploy Redmine on GlassFish v3 are given below (also on GlassFish Gem and on GlassFish v3 TP2):
    1. Download and unzip Redmine 0.8.5 (latest stable release).
    2. Change the database adapter from "mysql" to "jdbcmysql" as:

      sed s/'adapter: mysql'/'adapter: jdbcmysql'/ <config/database.yml.new >config/database.yml
    3. Create the database manually as "sudo mysqladmin create redmine_development". "db:create" fails because of JRUBY-3502.
    4. Migrate the database as "db:migrate".
    5. Deploy the application as:
      ~/samples/jruby/redmine >~/tools/glassfish/v3/9-16/glassfishv3/bin/asadmin deploy redmine-0.8.5
       Authentication failed with password from login store: /Users/arungupta/.asadminpass
      
      Enter admin password>
      Command deploy executed successfully.
    6. Here are some snapshots from the deployed application:





  4. Typo on GlassFish - Typo is the oldest Ruby on Rails blogware. The simplified steps to deploy Typo on GlassFish v3 are given below (also on GlassFish Prelude):
    1. Download and unzip Typo 5.3 (latest stable release).
    2. Change the database adapter from "mysql" to "jdbcmysql" as:

      sed s/'adapter: mysql'/'adapter: jdbcmysql'/ <config/database.yml.example >config/database.yml
    3. Create the database manually as "sudo mysqladmin create typo_dev". "db:create" fails because of JRUBY-3502.
    4. Typo runs using Rails 2.2.2 so lets install Rails 2.2.2 so lets install Rails 2.2.2 as:
      ~/samples/jruby/typo/typo-5.3 >~/tools/glassfish/v3/9-16/glassfishv3/glassfish/jruby/bin/jruby -S gem install rails -v 2.2.2
      JRuby limited openssl loaded. gem install jruby-openssl for full support.
      http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
      Successfully installed activesupport-2.2.2
      Successfully installed activerecord-2.2.2
      Successfully installed actionpack-2.2.2
      Successfully installed actionmailer-2.2.2
      Successfully installed activeresource-2.2.2
      Successfully installed rails-2.2.2
      6 gems installed
      Installing ri documentation for activesupport-2.2.2...
      Installing ri documentation for activerecord-2.2.2...
      Installing ri documentation for actionpack-2.2.2...
      Installing ri documentation for actionmailer-2.2.2...
      Installing ri documentation for activeresource-2.2.2...
      Installing ri documentation for rails-2.2.2...
      Installing RDoc documentation for activesupport-2.2.2...
      Installing RDoc documentation for activerecord-2.2.2...
      Installing RDoc documentation for actionpack-2.2.2...
      Installing RDoc documentation for actionmailer-2.2.2...
      Installing RDoc documentation for activeresource-2.2.2...
      Installing RDoc documentation for rails-2.2.2...
    5. Migrate the database as "db:migrate".
    6. Deploy the application as:
      ~/samples/jruby/typo >~/tools/glassfish/v3/9-16/glassfishv3/bin/asadmin deploy typo-5.3
      Authentication failed with password from login store: /Users/arungupta/.asadminpass
      
      Enter admin password>
      Command deploy executed successfully.
    7. Here are are some snapshots from the deployed application:





  5. Substruct on GlassFish - Substruct is an open source E-Commerce project in Ruby-on-Rails. The simplified steps to deploy Substruct on GlassFish v3 are given below (also on GlassFish v3 Gem):
    1. Download and unzip substruct 1.0 a6 (latest stable release).
    2. Install the required gems as:
      ~/samples/jruby/substruct >~/tools/glassfish/v3/9-16/glassfishv3/glassfish/jruby/bin/jruby -S gem install RedCloth fastercsv mime-types mini_magick ezcrypto jruby-openssl --no-ri --no-rdoc
    3. Change the database adapter from "mysql" to "jdbcmysql" as:

      ~/samples/jruby/substruct/substruct_rel_1-0-a6>sed s/'adapter: mysql'/'adapter: jdbcmysql'/ <config/database.yml
      >config/database.yml.new
      ~/samples/jruby/substruct/substruct_rel_1-0-a6>mv config/database.yml.new config/database.yml
    4. Create the database manually as "sudo mysqladmin create substruct_development". "db:create" fails because of JRUBY-3502.
    5. Initialize the database as:
      ~/samples/jruby/substruct/substruct_rel_1-0-a6 >~/tools/glassfish/v3/9-16/glassfishv3/glassfish/jruby/bin/jruby -S rake substruct:db:bootstrap
    6. Deploy the application as:
      ~/samples/jruby/substruct >~/tools/glassfish/v3/9-16/glassfishv3/bin/asadmin deploy substruct_rel_1-0-a6
      Authentication failed with password from login store: /Users/arungupta/.asadminpass
      Enter admin password>
      
      Command deploy executed successfully.
    7. Here is a snapshot of the deployed application:

So we deployed Redmine, Typo, and Substruct using JRuby/Rails on GlassFish without any additional packaging. There are several Rails applications deployed in production on GlassFish.

What Rails applications are you deploying on GlassFish ?

Technorati: glassfish v3 rails jruby redmine typo mephisto substruct

Sometime back I started a project - WOM, short for WSDL Object Model. The idea was to come up with a library that provides efficient parsing and provides a WSDL Object Model that can be used to inspect, traverse/navigate and will be useful for IDEs such as NetBeans and also WSDL 2 Java generators, such as Metro wsimport.
Using the f:ajax tag can make doing ajax with a repeating tag like ui:repeat considerably easier.

The GlassFish High Availability allows to setup a cluster of GlassFish instances and achieve highly scalable architecture using in-memory session state replication. This cluster can be very easily created and tested using the "clusterjsp" sample bundled with GlassFish. Here are some clustering related entries published on this blog so far:
  • TOTD #84 shows how to setup Apache + mod_proxy balancer for Ruby-on-Rails load balancing
  • TOTD #81 shows how to use nginx to front end a cluster of GlassFish Gems
  • TOTD #69 explains how a GlassFish cluster can be front-ended using Sun Web Server and Load Balancer Plugin
  • TOTD #67 shows the same thing using Apache httpd + mod_jk
#67 & #69 uses a web application "clusterjsp" (bundled with GlassFish) that uses JSP to demonstrate in-memory session replication state replication. This blog creates a similar application "clusterrails" - this time using Ruby-on-Rails and deploy it on GlassFish v2.1.1. The idea is to demonstrate how Rails applications can leverage the in-memory session replication feature of GlassFish.

Rails applications can be easily deployed as a WAR file on GlassFish v2 as explained in TOTD #73. This blog will guide through the steps of creating the Controller and View to mimic "clusterjsp" and configuring the Rails application for session replication.
  1. Create a template Rails application and create/migrate the database. Add a Controller/View as:

    ~/samples/jruby/session >~/tools/jruby/bin/jruby script/generate controller home index
    JRuby limited openssl loaded. gem install jruby-openssl for full support.
    http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
          exists  app/controllers/
          exists  app/helpers/
          create  app/views/home
          exists  test/functional/
          create  test/unit/helpers/
          create  app/controllers/home_controller.rb
          create  test/functional/home_controller_test.rb
          create  app/helpers/home_helper.rb
          create  test/unit/helpers/home_helper_test.rb
          create  app/views/home/index.html.erb

  2. Edit the controller in "app/controllers/home_controller.rb" and change the code to (explained below):

    class HomeController < ApplicationController
      include Java

      def index
        @server_served = servlet_request.get_server_name
        @port = servlet_request.get_server_port
        @instance = java.lang.System.get_property "com.sun.aas.instanceName"
        @server_executed = java.net.InetAddress.get_local_host().get_host_name()
        @ip = java.net.InetAddress.get_local_host().get_host_address
        @session_id = servlet_request.session.get_id
        @session_created = servlet_request.session.get_creation_time
        @session_last_accessed = servlet_request.session.get_last_accessed_time
        @session_inactive = servlet_request.session.get_max_inactive_interval

        if (params[:name] != nil)
          servlet_request.session[params[:name]] = params[:value]
        end

        @session_values = ""
        value_names = servlet_request.session.get_attribute_names
        unless (value_names.has_more_elements)
          @session_values = "<br>No parameter entered for this request"
        else
            @session_values << "<UL>"
            while (value_names.has_more_elements)
                param = value_names.next_element
                unless (param.starts_with?("__"))
                  value = servlet_request.session.get_attribute(param)
                  @session_values << "<LI>" + param + " = " + value + "</LI>"
                end
            end
            @session_values << "</UL>"
        end

      end

      def adddata
        servlet_request.session.set_attribute(params[:name], params[:value])
        render :action => "index"
      end

      def cleardata
        servlet_request.session.invalidate
        render :action => "index"
      end
    end

    The "index" action initializes some instance variables using the "servlet_request" variable mapped from "javax.servlet.http.ServletRequest" class. The "servlet_request" provides access to different properties of the request received such as server name/port, host name/address and others. It also uses an application server specific property "com.sun.aas.instanceName" to fetch the name of particular instance serving the request. In this blog we'll create a cluster with 2 instances. The action then prints the servlet session attributes name/value pairs entered so far.

    The "adddata" action takes the name/value pair entered on the page and stores them in the servlet request. The "cleardata" action clears any data that is storied in the session.
  3. Edit the view in "app/views/home/index.html.erb" and change to (explained below):

    <h1>Home#index</h1>
    <p>Find me in app/views/home/index.html.erb</p>
    <B>HttpSession Information:</B>
    <UL>
    <LI>Served From Server:   <b><%= @server_served %></b></LI>
    <LI>Server Port Number:   <b><%= @port %></b></LI>
    <LI>Executed From Server: <b><%= @server_executed %></b></LI>
    <LI>Served From Server instance: <b><%= @instance %></b></LI>
    <LI>Executed Server IP Address: <b><%= @ip %></b></LI>
    <LI>Session ID:    <b><%= @session_id %></b></LI>
    <LI>Session Created:  <%= @session_created %></LI>
    <LI>Last Accessed:    <%= @session_last_accessed %></LI>
    <LI>Session will go inactive in  <b><%= @session_inactive %> seconds</b></LI>
    </UL>
    <BR>
    <% form_tag "/session/home/index" do %>
      <label for="name">Name of Session Attribute:</label>
      <%= text_field_tag :name, params[:name] %><br>

      <label for="value">Value of Session Attribute:</label>
      <%= text_field_tag :value, params[:value] %><br>

        <%= submit_tag "Add Session Data" %>
    <% end  %>
    <% form_tag "/session/home/cleardata" do %>
        <%= submit_tag "Clear Session Data" %>
    <% end %>
    <% form_tag "/session/home/index" do %>
        <%= submit_tag "Reload Page" %>
    <% end %>
    <BR>
    <B>Data retrieved from the HttpSession: </B>
    <%= @session_values %>

    The view dumps the property value retrieved from the servlet context in the action. Then it consists of some forms to enter the session name/value pairs, clear the session and reload the page. The application is now ready, lets configure it for WAR packaging.
  4. Generate a template "web.xml" and copy it to "config" directory as:

    ~/samples/jruby/session >~/tools/jruby/bin/jruby -S warble war:webxml
    mkdir -p tmp/war/WEB-INF
    ~/samples/jruby/session >cp tmp/war/WEB-INF/web.xml config/
    1. Edit "tmp/war/WEB-INF/web.xml" and change the first few lines from:

      <!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd">
      <web-app>

      to

      <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

      This is required because the element to be added next is introduced in the Servlet 2.4 specification.
    2. Add the following element:

      <distributable/>

      as the first element, right after "<web-app>". This element marks the web application to be distributable across multiple JVMs in a cluster.
  5. Generate and configure "warble/config.rb" as described in TOTD #87. This configuration is an important step otherwise you'll encounter JRUBY-3789. Create a WAR file as:

    ~/samples/jruby/session >~/tools/jruby/bin/jruby -S warble
    mkdir -p tmp/war/WEB-INF/gems/specifications
    cp /Users/arungupta/tools/jruby-1.3.0/lib/ruby/gems/1.8/specifications/rails-2.3.2.gemspec tmp/war/WEB-INF/gems/specifications/rails-2.3.2.gemspec

    . . .

    mkdir -p tmp/war/WEB-INF
    cp config/web.xml tmp/war/WEB-INF
    jar cf session.war  -C tmp/war .

  6. Download latest GlassFish v2.1.1, install/configure GlassFish and create/configure/start a cluster using the script described here. Make sure to change the download location and filename in the script. This script creates a cluster "wines" with two instances - "cabernet" runing on the port 58080 and "merlot" running on the port 58081.
  7. Deploy the application using the command:

    ~/samples/jruby/session >asadmin deploy --target wines --port 5048 --availabilityenabled=true session.war
Now, the screenshots from the two instances are shown and explained below. The two (or more) instances are front-ended by a load balancer so none of this is typically visible to the user but it helps to understand.
Here is a snapshot of this application deployed on "cabernet":



The instance name and the session id is highlighted in the red box. It also shows the time when the session was created in "Session Created" field.

And now the same application form "merlot":



Notice, the session id exactly matches the one from the "cabernet" instance. Similarly "Session Created" matches but "Last Accessed" does not because the same session session is accessed from a different instance.

Lets enter some session data in the "cabernet" instance and click on "Add Session Data" button as shown below:



The session attribute is "aaa" and value is "111". Also the "Last Accessed" time is updated. In the "merlot" page, click on the "Reload Page" button and the same session name/value pairs are retrieved as shown below:



Notice, the "Last Accessed" time is after the time showed in "cabernet" instance. The session information added in "cabernet" is automatically replicated to the "merlot" instance.

Now, lets add a new session name/value pair in "merlot" instance as shown below:



The "Last Accessed" is updated and the session name/value pair ("bbb"/"222") is shown in the page. Click on "Reload page" in "cabernet" instance as shown below:



This time the session information added to "merlot" is replicated to "cabernet".

So any session information added in "cabernet" is replicated to "merlot" and vice versa.

Now, lets stop "cabernet" instance as shown below:



and click on "Reload Page" in "merlot" instance to see the following:



Even though one instance from which the session data was added is stopped, the replicating instance continues to serve both the session values.

As explained earlier, these two instances are front-ended by a load-balancer typically running at port 80. So the user makes a request to port 80 and the correct session values are served even if one of the instance goes down and there by providing in-memory session replication.

Please leave suggestions on other TOTD that you'd like to see. A complete archive of all the tips is available here.

Technorati: totd glassfish clustering rubyonrails jruby highavailability loadbalancer
Dealing with field focus in JSF 2 and ajax. It's not hard, but you do have to keep a basic rule in mind: Don't update the parent of the field with focus.
In my last blog entry, I went over getting a YUI widget working on JSF2. This time, let's go over what's required to move that widget into a JSF component. No Java required, but a fair bit of JavaScript.
NetBeans: the Java EE 6 IDE: NetBeans 6.8 Milestone 1 now offers Java EE 6 development environment with the GlassFish v3 b57 build.

This Tip Of The Day (TOTD) explains how to add pagination to your Rails application.
  1. Create a simple Rails scaffold as:

    ~/samples/jruby >~/tools/jruby/bin/jruby -S rails paginate
    ~/samples/jruby/paginate >~/tools/jruby/bin/jruby script/generate scaffold book title:string author:string
    ~/samples/jruby/paginate >sed s/'adapter: sqlite3'/'adapter: jdbcsqlite3'/ <config/database.yml >config/database.yml.new
    ~/samples/jruby/paginate >mv config/database.yml.new config/database.yml
    ~/samples/jruby/paginate >~/tools/jruby/bin/jruby -S rake db:migrate

  2. Edit "test/fixtures/books.yml" and specify the content as:

    # Read about fixtures at http://ar.rubyonrails.org/classes/Fixtures.html

    one:
      title: Ultramarathon Man Confessions of an All-Night Runner
      author: Dean Karnazes

    two:
      title: My Life on the Run
      author: Bart Yasso

    three:
      title: 50/50 Secrets I Learned Running 50 Marathons in 50 Days
      author: Dean Karnazes

    four:
      title: Born to Run
      author: Christopher Mcdougall

    five:
      title: Four Months to a Four-hour Marathon
      author: Dave Kuehls

    six:
      title:  Galloway's Book on Running
      author: Jeff Galloway

    seven:
      title: Marathoning for Mortals
      author: John Bingham and Jenny Hadfield

    eight:
      title:  Marathon You Can Do It!
      author: Jeff Galloway

    nine:
      title: Marathon The Ultimate Training Guide
      author: Hal Higdon

    ten:
      title: Running for Mortals
      author: John Bingham and Jenny Hadfield

    and load the fixtures as:

    ~/samples/jruby/paginate >~/tools/jruby/bin/jruby -S rake db:fixtures:load
    (in /Users/arungupta/samples/jruby/paginate)

  3. Run the application as:

    ~/samples/jruby/paginate >~/tools/jruby/bin/jruby -S glassfish -l
    Starting GlassFish server at: 129.145.132.8:3000 in development environment...
    Writing log messages to: /Users/arungupta/samples/jruby/paginate/log/development.log.

    . . .

    Jul 29, 2009 2:06:44 PM com.sun.grizzly.scripting.pool.DynamicPool$1 run
    INFO: New instance created in 7,488 milliseconds

    The application is accessible at "http://localhost:3000/books" and looks like:



    The page shows 10 rows, all in one page.
  4. Lets add pagination to this simple sample.
    1. Install will_paginate gem as:

      /tools/jruby >./bin/jruby -S gem install will_paginate
      JRuby limited openssl loaded. gem install jruby-openssl for full support.
      http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
      Successfully installed will_paginate-2.2.2
      1 gem installed
      Installing ri documentation for will_paginate-2.2.2...
      Installing RDoc documentation for will_paginate-2.2.2...

      There are other methods of installation as well.
    2. Edit "config/environment.rb" and add

      require "will_paginate"

      as the last line.
    3. Edit the "index" action in "app/controllers/books_controller.rb" as:

      @books = Book.paginate(:page => params[:page], :per_page => 5)
      #@books = Book.all

      ":per_page" specifies the number of items to be displayed in each page.
    4. In "app/views/books/index.html.erb", add:

      <%= will_paginate @books %>

      right after "</table>".

      The output now looks like:



      and clicking on "Next" shows:



      The information is nicely split amongst 2 pages.
An important point to remember is that will_paginate only adds pagination to your Rails app. You are still required to display all the values.

But essentially replacing "@books = Book.all" with "@books = Book.paginate(:page => params[:page], :per_page => 5)" in the Controller and adding
"<%= will_paginate @books %>" did the trick for us.

Clean and simple!

Please leave suggestions on other TOTD (Tip Of The Day) that you'd like to see. A complete archive of all the tips is available here.

Technorati: jruby rubyonrails glassfish pagination will_paginate
There's more to web development with JSF than just using JSF component libraries - there's a lot of really great widget sets out there that have nothing to do with JSF - here's a quick example of using one (the YUI Calendar widget) with JSF, Ajax, and a Managed bean.
About a year ago, I gave a talk at JavaOne on how to write a Comet powered TicTacToe game. At the time, I used the Grizzly Comet APIs. Here's an update for it to use the multi-platform Atmosphere API set.
Andy Schwartz, one of the JSF EG members, has written an excellent blog [1] on what's new in JSF 2.0.
Definitely worth a read!

[1] http://andyschwartz.wordpress.com/2009/07/31/whats-new-in-jsf-2/


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:

[#|2009-07-30T15:29:50.788-0700|SEVERE|sun-appserver2.1|javax.enterprise.system.container.web|_ThreadID=17;
_ThreadName=httpWorkerThread-4848-0;_RequestID=1d7e8f18-1c9a-4924-bd0b-6a07eba425ba;|WebModule
[/session]unable to create shared application instance
org.jruby.rack.RackInitializationException: undefined method `new' for "Rack::Lock":String
        from /Users/arungupta/tools/glassfish/v2.1/glassfish/domains/domain1/applications/j2ee-modules/session/WEB-INF/gems/gems/actionpack-2.3.2/lib/
action_controller/middleware_stack.rb:116:in `inject'
        from /Users/arungupta/tools/glassfish/v2.1/glassfish/domains/domain1/applications/j2ee-modules/session/WEB-INF/gems/gems/actionpack-2.3.2/lib/
action_controller/middleware_stack.rb:116:in `build'
        from /Users/arungupta/tools/glassfish/v2.1/glassfish/domains/domain1/applications/j2ee-modules/session/WEB-INF/gems/gems/actionpack-2.3.2/lib/
action_controller/dispatcher.rb:82:in `initialize'

. . .

This is a known issue as reported at JRUBY-3789 and JRUBY_RACK-18.

As the bug report indicates, this is actually an issue with jruby-rack-0.9.4 and is fixed in jruby-rack-0.9.5. The 3-step workaround is described here and explained below for convenience:
  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.
And now follow your regular procedure of creating the .war file using "jruby -S warble" and happily deploy your Rails/Sintara/Merb applications on GlassFish.

There are several users who are already using Rails on GlassFish in production environment and they are listed at rubyonrails+glassfish+stories. Drop a comment on this blog if you are using it too :)

Technorati: jruby rack glassfish war servlet rubyonrails
David Geary has the third of his three part series of JSF 2 articles up. If you're getting started with JSF 2, go check it out - lots of good information there.

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 EEGrails, 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
Atmosphere 0.3 released with support for Scala, Clustering, Injections, Grails Support, Cometd/Bayeux Protocol, many performance improvements, and many new extension points!!
Hazem Saleh has posted a short blog on executing scripts in a JSF client page. Here's a link, along with some comments on his post.
How to satisfy compile time dependencies on JSR-303.
We've had another release of JSF 2, this one called Beta 2. The march toward FCS continues.
Recording of May JSF2 Complete Tour Webinar Available
Summary of a JavaOne hallway conversation about JSF: it's gotten a lot better.
Writing Atmosphere's Comet based applications is simple. Imagine using Scala instead of Java...then it becomes really simple!
Just a quick note to let folks know that 1.2_13 has been released.   Please see the announcement for details.

It is really simple to add clustering support to an Atmosphere's Comet based application, and deploy it inside any Servlet Container supporting Servlet 3.0, Comet or not. You just have to decide which group technology you want to use, thanks to Atmosphere Plug in: Shoal or JGroups!