Problems with Java Applet and JOGL: Java, Any, applet jogl

Problems with Java Applet and JOGL

All,
I am trying to get JOGL to work with an applet and I am exasperated. I'll say up front for reasons I won't explain I do not want to use the JNLP Launcher. I just want to use a plain old signed applet with the normal HTML tags. I have spent many hours on this problem and have taken several routes and still haven't succeeded. Here's where I am in the process and the approach I'm taking.

1. Launch a signed applet via HTML with your standard applet tag.
2. To the best of my knowledge, because System.load and System.loadLibrary will only load a library from a local drive not over a network using a URL, I download the required library files (jogl.dll, jogl_awt.dll, jogl_cg.dll, and gluegen-rt.dll) by copying the files from the webserver to a local drive on the end user's machine. Currently I am using the java.io.tmp property as the local directory. This seems to work fine.
3. I then use System.load to load the libraries from java.io.tmp. This seems to work fine. No exceptions.
4. Steps 3 and 4 are done in AccessController doPriviedged block to satisfy the security requirements.

Here's the problem.

5. When the code that actually uses the librairies is executed, it tries to reload the libraries from java.library.path. Of course the library files aren't there, because they are in java.io.tmp, and an exception is thrown.

So here's my questions/comments:

1. Does anybody know why the system would try to reload the libraries when they have already been loaded?
2. It seems pretty conclusive that java.library.path cannot be changed at runtime, so that isn't an option. Correct me if I'm wrong.
3. I've tried to copy the files to java.library.path, but that is a list of directories, most which require special permision to write to. That doesn't seem to be an option. Correct me if I'm wrong.

I am out of ideas on this, so any input would be greatly appreciated.

I'll attach a short code snippet that shows how I'm loading the libraries.

Thanks,
M. Warble

AccessController.doPrivileged(new PrivilegedAction() 
{
   public Object run() 
   {
      try
      {		       			
          String lib = System.getProperty("java.io.tmpdir");
          copyFile("http://www.mydomain.com/" + System.mapLibraryName("jogl"), lib + System.mapLibraryName("jogl"));
          copyFile("http://www.mydomain.com/" + System.mapLibraryName("jogl_awt"), lib + System.mapLibraryName("jogl_awt"));
          copyFile("http://www.mydomain.com/" + System.mapLibraryName("jogl_cg"), lib + System.mapLibraryName("jogl_cg"));
          copyFile("http://www.mydomain.com/" + System.mapLibraryName("gluegen-rt"), lib + System.mapLibraryName("gluegen-rt"));
		       			
           System.load(lib + System.mapLibraryName("jogl"));
           System.load(lib + System.mapLibraryName("jogl_awt"));
           System.load(lib + System.mapLibraryName("gluegen-rt"));
	
	// code that uses libraries        	   
           wwd = new WorldWindowGLJPanel();

1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:

Select all Open in new window

Instant Access to this Solution

Plus...

30 Day FREE access, no risk, no obligation

Collaborate with the world's top tech experts

Unlimited access to our exclusive solution database

Never be left without tech help again

Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.

"The time we save is the biggest benefit of Experts Exchange to Warner Bros. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange." Mike Kapnisakis, Warner Bros.

"Our team likes having a resource that is more secure than just using Google and most experts using this service really know their stuff. It's nice to look here first versus using Google." Dayna Sellner, Lockheed Martin

"Anytime that I've been stumped with a problem, 9 out of 10 times Experts Exchange has either the accepted solution or an open discussion of the potential solution to the problem." Kenny Red, eBay Inc.

See what Experts Exchange can do for you.

Got a question?

We've got the answer.

Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.

Screenshot of Experts Exchange Knowledgebase

Need individual assistance?

Our experts are ready to help.

If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.

Want to learn from the best?

Read articles from industry experts.

Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.

Working on a long term project?

Store your work and research.

Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.

Join the Community

Give a Little. Get a Lot.

Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.

Question

Problems with Java Applet and JOGL

Subscribe now for full access to Experts Exchange and get

Instant Access to this Solution

Java

Any

applet jogl

Java Native Interface (JNI)

New to Java Programming

Java Programming Language

Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.

See what Experts Exchange can do for you.

Got a question?

We've got the answer.

Need individual assistance?

Our experts are ready to help.

Want to learn from the best?

Read articles from industry experts.

Working on a long term project?

Store your work and research.

What Makes Experts Exchange Unique?

Trusted by the world's most respected brands.

Faithfully serving IT professionals since 1996.

Related Solutions

Free Tech Articles

Cloud Class Webinars

Join the Community

Give a Little. Get a Lot.

Answers

3 Ways to Join

The Experts

The Experts

Testimonials

Testimonials

Testimonials

Business Clients

Business Clients

In the Press

In the Press

In the Press