Applet - path for jar files?

Hi,

i want to embed an applet into a page served by OF. The applet needs
access to some jar files. I don't know how to make the jar files
available for the applet. The class that contains the applet is in the
same directory as the HTML page.

In the view (at this time, a pure html page), i have:

<object classid="java:SgApplet.class"
    codetype="application/java-vm"
         width="600" height="530">
                <param name="archive" value="antlr-2.7.6.jar,
                        commons-cli-1.0.jar,
                        commons-pool-1.2.jar,
                        excalibur-cli-1.0.jar,
                        exist.jar,
                        javax.servlet.jar,
                        jaxen-1.1-beta-6.jar,
                        jEdit-syntax.jar,
                        jgroups-all.jar,
                        jline-0_9_5.jar,
                        log4j-1.2.13.jar,
                        resolver.jar,
                        sunxacml.jar,
                        xmldb.jar,
                        xmlrpc-1.2-patched.jar" />
        </object>

In the page flow, i added a files entry for the jar files and the class
file. I tried to put the jar files into WEB-INF/lib as well as in the
same dir as the html file, but both didn't work. The java console shows
that the applet gets loaded, but then a NullPointerException occurs, i
suppose at the point where the jars should get loaded:

basic: Registrierter Modality-Listener
basic: ClassLoader wird referenziert:
sun.plugin.ClassLoaderInfo@153c375, refcount=1
basic: Fortschritts-Listener hinzugefügt:
sun.plugin.util.GrayBoxPainter@273686
basic: Applet wird geladen...
basic: Applet wird initialisiert...
basic: Applet wird gestartet...
java.lang.NullPointerException
        at sun.plugin.cache.Cache.updateTable(Unknown Source)
        at sun.plugin.cache.JarCache.getMatchingFile(Unknown Source)
        at sun.plugin.cache.CachedJarLoader$4.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.plugin.cache.CachedJarLoader.getCacheFile(Unknown Source)
        at sun.plugin.cache.CachedJarLoader.<init>(Unknown Source)
        at sun.plugin.cache.JarCache.get(Unknown Source)
        at sun.plugin.net.protocol.jar.CachedJarURLConnection.connect(Unknown
Source)
        at
sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(Unknown
Source)
        at sun.misc.URLClassPath$JarLoader.getJarFile(Unknown Source)
        at sun.misc.URLClassPath$JarLoader.<init>(Unknown Source)
        at sun.misc.URLClassPath$3.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.misc.URLClassPath.getLoader(Unknown Source)
        at sun.misc.URLClassPath.getLoader(Unknown Source)
        at sun.misc.URLClassPath.getResource(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at sun.applet.AppletClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.applet.AppletClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.applet.AppletClassLoader.loadCode(Unknown Source)
        at sun.applet.AppletPanel.createApplet(Unknown Source)
        at sun.plugin.AppletViewer.createApplet(Unknown Source)
        at sun.applet.AppletPanel.runLoader(Unknown Source)
        at sun.applet.AppletPanel.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
basic: Ausnahme: java.lang.NullPointerException

The jars are signed and everything works fine if i put the html and the
jars on an apache server. But because i want to access the applet from
OF, i need it to run inside OF. Any hints?

Thanks in advance
florian




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Florian,

To solve this kind of problems, try the following two steps:

1. Look at the Tomcat or Orbeon Forms logs and check what path is
actually required by the client.

2. Make sure something on your server is able to serve the path
requested by the client ;-)

Have you tried adding somthing like this to your page flow:

   <files path-info="*.jar"/>

-Erik

Florian Schmitt wrote:
--
Orbeon Forms - Web Forms for the Enterprise Done the Right Way
http://www.orbeon.com/



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