Offline deploying of JWS app

Question

Hello,
I have pretty big JWS app, it's loading properly, it's running properly and generally speaking everything is just fine. But the as you focus on the word "big", you will get the point---it has about 30MB and it is to be supposed to run on mobile laptops with GPRS connection to internet. In other words: very slow connection. So the initial download could be very long and problematic, besides not every worker is familiar enough with "technical problems", so it may happen that on some terminals it would fail to initialize properly. So I (we) wanted to issue installation CD to our workers with the complete installation. And the the question: is there a way to preinstall JWS app not directly from host and via JNLP file, but from local files?

Answer 1

Hi
You could pre-install the bulk of the jars into the lib folder of the JRE on the laptop, leave a single small jar on the server to act as the booting application. All your classes should then be available because the JVM boot path automatically includes all jars stored in the jre/lib folder...
The booting class could event do a getClassLoader().getInstance("your.class.name") to check to see if your custom jars are available. If they are not then it could say something like "Sorry you need to install the software from the CD befor running this application"
If your not comfortable installing the extra jars in the jre/lib folder you could (alternately) install the jars in another location on the machine and invoke a new instance of the JVM with those jars on the boot path (using the System.exec(""))
Z