Getting verbose class loading output in GlassFish

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

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

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

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

Modularizing Enterprise Java Applications

GlassFish at enterprise OSGi face2face event - Meeting with OSGi Experts

Meeting with OSGi Experts

How to embed GlassFish in an existing OSGi runtime?

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

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?

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 {