Applets and HTML 5 Offline Cache

Question

Hi,
We're doing some tests with offline application caching in HTML 5 (using Firefox 3.5 for testing).
We can get our basic app to work offline, but the Applets refuse to load from the offline cache.
You can see the demo here: http://3d-lab.aarkid.com/playground/html5/
Just enter a message and it will appear in the two applets and in the HTML below (there are two because we initially thought it was a problem due to the middleware we were using, so there's a basic Applet there too). You will need to wait for the Applets to load before the controls appear.
Now, when offline (completely offline, no Internet connection at all) the Applets are trying to load the class from their online location rather than using the cached version. (console output below)
Is there any way to tell the Java Plug-in that it's offline or where to load the classes from?
Thanks.
Console:
Java Plug-in 1.6.0_17
Using JRE version 1.6.0_17-b04 Java HotSpot(TM) Client VM
User home directory = C:\Users\Brian
c:   clear console window
f:   finalize objects on finalization queue
g:   garbage collect
h:   display this help message
l:   dump classloader list
m:   print memory usage
o:   trigger logging
q:   hide console
r:   reload policy configuration
s:   dump system and deployment properties
t:   dump thread list
v:   dump thread stack
x:   clear classloader cache
0-5: set trace level to <n>
load: class HTML5TestApplet.class not found.
java.lang.ClassNotFoundException: HTML5TestApplet.class
    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.net.UnknownHostException: 3d-lab.aarkid.com
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at sun.net.NetworkClient.doConnect(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.http.HttpClient.<init>(Unknown Source)
    at sun.net.www.http.HttpClient.New(Unknown Source)
    at sun.net.www.http.HttpClient.New(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at java.net.HttpURLConnection.getResponseCode(Unknown Source)
    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: HTML5TestApplet.class

Answer 1

AndrewThompson64 wrote:
Out of curiosity. What is it you can do with JS that cannot be done with an applet and an active server (e.g. something that can run PHP, JSP, ASP..)?We require the app to run completely offline (or rather, the client does) (i.e.) no Internet connection. We have tried giving them an install with a portable apache and PHP, which has worked in the past but not for this client. So we were attempting to use HTML 5 for storing data offline, but the lack of support for offline caching in the Java Plug-in is the only thing holding us back, I guess we'll just have to wait for Sun to catch up :)