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Debugging Spring OSGi with NetBeans IDE

· Java Zone

Check out this 8-step guide to see how you can increase your productivity by skipping slow application redeploys and by implementing application profiling, as you code! Brought to you in partnership with ZeroTurnaround.

NetBeans is my favorite IDE but it suffers from lack of OSGi support. Eclipse with Equinox and plug-ins wins in terms of fast build, test, and deploy.

I try here to show how to create, build, and debug OSGi bundles with NetBeans IDE. For this purpose, I use Maven modules. First, I create a parent project. Next, using NetBeans 6.1, I create 4 sub-projects with the Spring DM architectype:

     

  1. exceptions : exception packages
  2. api : service to be implemented and published
  3. impl : service implementation
  4. test : test bundle

Full project source is available under this url : svn checkout http://debugosgi.googlecode.com/svn/trunk/ debugosgi-read-only

Now, if we launch Equinox and start or update test bundle we get jtunisie as output:

$ java -jar equinox.jar -console

osgi> log4j:WARN No appenders could be found for logger (org.springframework.util.ClassUtils).
log4j:WARN Please initialize the log4j system properly.

osgi> ss

Framework is launched.

id State Bundle
0    ACTIVE      org.eclipse.osgi_3.3.2.R33x_v20080105
1    ACTIVE      org.eclipse.equinox.common_3.3.0.v20070426
2    ACTIVE      org.eclipse.update.configurator_3.2.100.v20070615
3    ACTIVE      com.jtunisie.osgi.debug.debug.dao.impl_1.0.0.SNAPSHOT
4    ACTIVE      org.springframework.bundle.osgi.io_1.1.0.m1
5    ACTIVE      slf4j.log4j12_1.4.3
6    ACTIVE      org.springframework.bundle.osgi.extender_1.1.0.m1
7    ACTIVE      org.springframework.bundle.spring.core_2.5.2
8    ACTIVE      org.eclipse.osgi.services_3.1.200.v20070605
9    ACTIVE      org.springframework.bundle.spring.aop_2.5.2
10    ACTIVE      jcl104.over.slf4j_1.4.3
11    RESOLVED    com.jtunisie.osgi.debug.debug.test_1.0.0.SNAPSHOT
12    ACTIVE      org.springframework.osgi.asm.osgi_2.2.3.SNAPSHOT
13    ACTIVE      org.springframework.bundle.osgi.core_1.1.0.m1
14    ACTIVE      slf4j.api_1.4.3
15    ACTIVE      org.springframework.bundle.spring.beans_2.5.2
17    ACTIVE      org.springframework.bundle.spring.context_2.5.2
18    ACTIVE      org.springframework.osgi.log4j.osgi_1.2.15.SNAPSHOT
20    ACTIVE      org.springframework.bundle.spring.context.support_2.5.2
21    ACTIVE      org.springframework.osgi.aopalliance.osgi_1.0.0.SNAPSHOT

osgi> start 11

osgi> jTunisie

osgi> up 11

osgi> jTunisie

osgi>


Now, to debug deployed bundle and service we put a break point on service impl and we execute this command:

$ java -Xdebug -Xnoagent -Xrunjdwp:transport=dt_socket,address=8888,server=y,suspend=y -jar equinox.jar -console
Listening for transport dt_socket at address: 8888



open netbeans --> Run --> attach debbuger and we change the host and port as the following picture shows:

osgi> log4j:WARN No appenders could be found for logger (org.springframework.util.ClassUtils).
log4j:WARN Please initialize the log4j system properly.
Listening for transport dt_socket at address: 8888
jTunisie




Note that NetBeans highlights the break point and we get the message on equinox console continue debug button is clicked:

The Java Zone is brought to you in partnership with ZeroTurnaround. Check out this 8-step guide to see how you can increase your productivity by skipping slow application redeploys and by implementing application profiling, as you code!

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