> -----Original Message----- > From: [email protected] On Behalf Of irrumabo > Sent: 01 September 2010 12:54 > To: Trac Users > Subject: [Trac] Java Applet Inside Trac Plugin > > I'm trying to develop a Trac plugin that contains a Java Applet to > display some data. What I've tried so far is writing a little applet > that just displays 'hello world', and a test html program with an > <applet> tag to test it, which works. I've then copied the .class file > into the htdocs directory of my plugin, and added the same <applet> > markup to my genshi template in my templates directory. I build the > egg and end up with a structure like this: > > +my_plugin > +htdocs > MyApplet.class > +templates > my_plugin.html > my_plugin.py > my_plugin.pyc > __init__.py > __init__.pyc > +EGG-INFO > dependency_links.txt > entry_points.txt > PKG-INFO > SOURCES.txt > top_level.txt > zip-safe > > The html template tries to show the applet at the top with an html > table underneath it. When I deploy the plugin, I get a Java error box > where the applet should be, and the html table displays fine. The > output from the JVM console is as follows: > > load: class MyApplet not found. > java.lang.ClassNotFoundException: MyApplet > at > sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source) > at java.lang.ClassLoader.loadClass(Unknown Source) > at java.lang.ClassLoader.loadClass(Unknown Source) > at > sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source) > at > sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source) > at sun.plugin2.applet.Plugin2Manager > $AppletExecutionRunnable.run(Unknown Source) > at java.lang.Thread.run(Unknown Source) > Caused by: java.io.IOException: open HTTP connection failed:http:// > localhost/Projects/MyApplet.class > at > sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source) > at > sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source) > at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source) > at java.security.AccessController.doPrivileged(Native Method) > ... 7 more > Exception: java.lang.ClassNotFoundException: MyApplet > > So obviously the JVM can't find the Applet. I've tried various > permutations of the above, including putting the class file in the > templates directory as well, and trying to use a .jar instead of just > the naked class file, all without success. > > My applet tag in the template looks like this: > > <applet code="MyApplet" width="600" height="600"> > </applet> > > I'm running Trac 0.11.6 with Apache. Basically my question is a) is it > possible to embed an applet in a Trac plugin, and b) if so how do I > set up the template, egg, Trac and Apache correctly for it to work? > I've searched and could only find one plugin that mentions using an > applet, called ScrumPlugin, but it looked to me like they just deploy > the class file in the htdocs directory too. I've modified the trac.ini > to set "render_unsafe_content" to true. Thanks for your help. > I'm guessing here but my understanding is that the remote browser is the one that needs to load the .class (or jar) file? Therefore you need to put the .class file somewhere where the server is happy to serve it from (without trac being involved) and make sure that the links work for your server...
Of course I could be completely wrong, I've only done a little java and that for a local app. ~ mark c -- You received this message because you are subscribed to the Google Groups "Trac Users" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/trac-users?hl=en.
