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Sahoo

Sahoo is an engineer at Sun Microsystems, working in Java EE application server development engineering group. He contributes to glassfish project. Besides that he is also involved in writing a portability checking tool for Java EE applications. Prior experiences include working in C++ language binding for an object database management system, developing enterprise applications using CORBA & messaging middleware. Although his full name is Sanjeeb Kumar Sahoo, he prefers to be called by his last name *Sahoo*.

 

ss141213's blog

Getting verbose class loading output in GlassFish

Posted by ss141213 on February 23, 2012 at 12:49 AM PST

Java VM has a standard option called -verbose as shown by java -help:

    -verbose[:class|gc|jni]
                  enable verbose output

To diagnose class loading issues, you need to specify -verbose:class. It's straight forward to use if you are launching the Java process yourself. How does a GlassFish user use this?

Lazy loading of classes not working

Posted by ss141213 on November 2, 2011 at 11:00 PM PDT

Look at the code below where the main() loads a class whose name is specified by first argument. The second argument tells whether the class should be resolved or not. It also contains 5 test classes: A1, A2 and their dependencies: B, B1, B2. We will try to identify how early Bs are needed if I want to use As.

OSGi/JMS/MDB Example

Posted by ss141213 on April 22, 2010 at 12:39 AM PDT

Here is an example of yet another hybrid (OSGi + Java EE) application. This is a complete JMS consumer/producer example using OSGi and GlassFish. You can download the complete sample from here.

JAX-WS Web Service in an OSGi bundle

Posted by ss141213 on April 8, 2010 at 1:21 AM PDT

Recently a user in GlassFish forum asked about developing JAX-WS web service in an OSGi bundle. Here is a complete sample demonstrating a JAX-WS web service invoking an OSGi service via OSGi service registry. You can download it from here. The diagram below hopefully explains the organisation of the sample:

EJB as OSGi Service demo at eclipsecon

Posted by ss141213 on March 30, 2010 at 6:45 PM PDT

Modularizing Enterprise Java Applications

Posted by ss141213 on March 24, 2010 at 12:17 AM PDT




GlassFish at enterprise OSGi face2face event - Meeting with OSGi Experts

Posted by ss141213 on March 22, 2010 at 12:40 PM PDT




Meeting with OSGi Experts

 

How to embed GlassFish in an existing OSGi runtime?

Posted by ss141213 on February 14, 2010 at 8:21 AM PST

Typical users of GlassFish use GlassFish in a separate process and they start GlassFish by using commands like the following:

javap ignores Class-Path manifest entry

Posted by ss141213 on October 14, 2009 at 12:04 AM PDT

Did you know javap ignores Class-Path manifest attribute where as javac honors it? I didn't. Now I know. I have a jar called foo.jar with following manifest entry:

Having trouble creating a Jar with MANIFEST.MF?

Posted by ss141213 on October 13, 2009 at 2:33 AM PDT

When my colleague Marina Vatkina sent me some code earlier today hoping a second pair of eyes would spot the obvious error, knowing how thorough Marina typically is, I knew there was no obvious error there. Simplified version of what was being attempted is shown below:

import java.io.*;
import java.util.*;
import java.util.jar.*;

public class CreateJarWithManifest {