Re: [platform-dev] JNLP and win32 - java.library.path

[Pascal Rapicault <Pascal_Rapicault@xxxxxxxxxx>]

The best place for this type of question
is on the platform newsgroup.
As for the specific problem you are
encountering you should take a look at http://www-128.ibm.com/developerworks/opensource/library/os-jws/

PaScaL

Chad Oleary <oleary.chad@xxxxxxxxx>
Sent by: platform-dev-bounces@xxxxxxxxxxx

01/21/2006 08:14 PM

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Subject	[platform-dev] JNLP and win32 - java.library.path

Hi,
 
I hope this is the right place to post this. If not, could
you point me in the right direction? I'm having a problem that looks like
a usual suspect at first glance. However, I've done my homework, and this
one isn't the norm... 
 
I'm trying to use JNLP to launch an application. It works
fine for Linux clients, but not Windows clients. I've been doing some testing,
and the problem still exists even in the SWT examples, like ControlExample.
Launches fine in Linux, but not Windows. If I run them as executable jars
on windows, both the examples and the application I'm trying to package
work fine. 
 
Here's the error.. 
 
java.lang.reflect.InvocationTargetException
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke (Unknown Source)
 at java.lang.reflect.Method.invoke(Unknown Source)
 at com.sun.javaws.Launcher.executeApplication(Unknown Source)
 at com.sun.javaws.Launcher.executeMainClass(Unknown Source)
 at com.sun.javaws.Launcher.continueLaunch (Unknown Source)
 at com.sun.javaws.Launcher.handleApplicationDesc(Unknown Source)
 at com.sun.javaws.Launcher.handleLaunchFile(Unknown Source)
 at com.sun.javaws.Launcher.run(Unknown Source)
 at java.lang.Thread.run (Unknown Source)
Caused by: java.lang.UnsatisfiedLinkError: no swt-win32-3139 in java.library.path
 at java.lang.ClassLoader.loadLibrary(Unknown Source)
 at java.lang.Runtime.loadLibrary0(Unknown Source)
 at java.lang.System.loadLibrary (Unknown Source)
 at org.eclipse.swt.internal.Library.loadLibrary(Library.java:123)
 at org.eclipse.swt.internal.win32.OS.<clinit>(OS.java:18)
 at org.eclipse.swt.widgets.Display.<clinit>(Display.java :125)
 at org.eclipse.swt.examples.controlexample.ControlExample.main(ControlExample.java:184)
 ... 11 more
 
Looks pretty standard, right? java.library.path issue.
However, I've dealt with that in the past. I went so far as to set java.library.path
to "." using System.setProperty("java.library.path",
"."); Then I created an inital executable jar that's sole job
was to unpack the swt dll's into ".". I also tried setting java.library.path
in my .jnlp as a resource property.  Also, I've tried setting java.library.path
using a -D passed to the vm, nothing.. I'm pretty sure that java is setting
the java.library.path correctly, or else I'd expect the exectable jars
to fail.  
 
Now, I'm at the point where I'm doing it word for word
from the very well documented FAQ's. I've found two of them, both nearly
identical, on the main swt website. Here are the main .jnlp I'm using...
 
<?xml version="1.0" encoding="utf-8"?>
<jnlp
  spec="1.0+"
  codebase="">
http://www.foo.com/bar
  href="" 
  <information>
    <title>SWT Examples</title>
    <vendor>Your website</vendor>
    <homepage href="">
http://eclipse.org/swt"/ >
    <description>SWT ControlExample</description>
    <offline-allowed/>
  </information>
  <security>
      <all-permissions/>
  </security>
  <resources> 
    <j2se version="1.3+"/>
    <jar href="">
    <extension name="swt" href="">
  </resources>
  <application-desc main-class=" org.eclipse.swt.examples.controlexample.ControlExample"/>
</jnlp>
 
Here's the SWT extension jnlp:
 
<?xml version="1.0" encoding="utf-8"?>
<jnlp
  spec="1.0+"
  codebase="">
http://www.foo.com/bar/swt"
  href="" ">
  <information>
    <title>SWT Libraries</title>
    <homepage href="">
http://www.eclipse.org/swt"/>
    <description>SWT Libraries</description> 
    <offline-allowed/>
    <vendor>Your website</vendor>
  </information>
  <security>
    <all-permissions/>
  </security>
  <resources os="Windows" arch="x86"> 
    <jar href="">
    <nativelib href="">
  </resources>
  <resources os="Linux" arch="i386"> 
    <jar href="">
    <nativelib href="">
  </resources>
  <component-desc/>
</jnlp>
 
And, here's the directory structure:
 
4       ./swt/swt.jnlp
1236    ./swt/os/linux/x86/swt.jar
244     ./swt/os/linux/x86/swtNativeLib.jar
1484    ./swt/os/linux/x86
1488    ./swt/os/linux
1304    ./swt/os/win32/x86/swt.jar
88      ./swt/os/win32/x86/swtNativeLib.jar 
1396    ./swt/os/win32/x86
1400    ./swt/os/win32
2892    ./swt/os
2900    ./swt
4       ./swtexamples.jnlp
208     ./swtexamples.jar
 
Any thoughts, pointing out typos, comments, etc.. would
be welcomed. If there's anything else I can provide, please let me know.
Also, if anyone knows how to get a console for a JNLP launched app, that
would help me greatly. 
 
Thanks,
 
--Chad
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