Programming

Hi All,

This discussion involves getting a way to load different jars in different Operating Systems.

Case Scenario
---------------
I am working on a specific OS known as NSK. Its an unix flavour and powers the HP NSK Servers. I am running one of my middleware app ( a java application) on NSK. The requirement is to make this app off-platform. i.e. it must work in other platforms like LINUX or Windows as well.

To implement this, I introduced 1 more jar. Now I need to introduce a logic where-in the JVM must load the appropriate jar at runtime (jar1 on NSK and jar2 on any other non-NSK platform). I used the following logic to implement:

Code:

if (System.getProperty(os.name).equals("NSK"))
     load jar1
else 
     load jar2

The above code works fine until I hit one of the Security exceptions "SecurityException" in getProperty API used above. This tells that the user running the app does not have necessary permission to use getProperty(). So, the above logic goes for a toss here.

Is there any way to tackle this exception and still be able to find out OS details and load the correct jar? Or better, are there any better logic to implement the same?

Please refer the below link for more details about getProperty(..)
System (Java Platform SE 7 )

Thanks in advance

Regards,
Pabitra

my java is significantly non-existent but try running a java shell call instead of using the getProperty API so you get around the permission issue ...

Code:

Process p = Runtime.getRuntime().exec("/bin/hostname");

I am afraid the above code snippet is not uniform across all platforms. For example /bin/hostname might work in UNIX but not in Windows.

in that case, you must specify in the install documents that root or Administrator rights are required to run the installer ...