Comments on: Developing A Simple Pluggable Java Application

By: Suchitto Palit

Suchitto Palit — Thu, 18 Feb 2010 15:50:16 +0000

Hi James.
1> The class StandardPluginService.java is a Singleton, isn’t it ?

2> In the Main.java line 10 we do not need that line of code
“private static Logger logger = Logger.getLogger(Main.class.getName());”

Isn’t it?

3> In ClasspathUtils.java line 59 I changed “Class sysclass = URLClassLoader.class;” to “Class sysclass = URLClassLoader.class;” .

That eleminated unchecked error “[unchecked] unchecked call to getDeclaredMethod(String name, Class… parameterTypes) as a member of the raw type java.lang.Class ” in line 62
“Method method = sysclass.getDeclaredMethod(”addURL”, parameters);”.

I learned it from the link below.

http://www.angelikalanger.com/GenericsFAQ/FAQSections/ProgrammingIdioms.html#FAQ002

By: Suchitto Palit

Suchitto Palit — Sat, 13 Feb 2010 18:56:25 +0000

Great Post. And very clear. Helped me a lot. Thank you very much James.

By: Anonymous

Anonymous — Tue, 10 Nov 2009 14:52:05 +0000

Extremely complicated example. Try doing a Google search for more simple examples. 215 lines of code says it all, it can be done in less than half that number of lines.

By: Adym

Adym — Fri, 30 Oct 2009 18:53:04 +0000

Hi,
Great article. I’m probably gonna use this for JBJF…

adym

By: Lex

Lex — Sat, 03 Oct 2009 10:29:25 +0000

Hi all! Give please worked source code, in archive..And that is impossible

By: Peter

Peter — Fri, 02 Oct 2009 06:57:25 +0000

Nice! So, this article is about ServiceLoader (in java > 6) the other one mentioned above http://java.dzone.com/news/how-create-pluggable-photo-alb is about openide Lookup (NetBeans) and another candidate is osgi: http://karussell.wordpress.com/2009/09/16/plugable-swing-a-hello-world-osgi-example/

By: Faisal Basra

Faisal Basra — Wed, 30 Sep 2009 08:32:46 +0000

That is really really a superb stuff, that i ever want to know it. In past, I have experienced the many PHP based CMS & systems, and they have extensive usage of real time plug-ins, add-ons and themes and at that time I wish how to achieve this in Java.

Thanks a lot once again, sharing such a great concept.

By: Pad

Pad — Wed, 30 Sep 2009 03:36:16 +0000

Nice post !! Don’t know if it’s gonna help me for my next development but I didn’t have any clue about how such a system could be implemented. Thanks for this article

By: Guido

Guido — Tue, 29 Sep 2009 12:08:41 +0000

Good example, thx!
I knew about the service api but your example is very clear.
Didn’t wan’t to use osgi or the netbeans platform for my future javafx application.

By: Steve

Steve — Tue, 29 Sep 2009 09:22:09 +0000

Great post James. I’ll find this very useful on future projects. I wondered how applications got pluggins to tie in to its all clear to me now