Best way to upgrade an application

[papana]

Hello all I need your advice,
I have an application deployed in hundreds of phones and it is still under development.
So when i have a new version ready it's a pain to deploy it for every customer. Especially if i have made some changes in DB, or new http requests because the user need to remove the previous version and install the new one after.

Now, in order to simplify the upgrade process I want to review my application architecture. In your expirience what the best way to do?

I want to split the application in several plugins using ecom, or dlls.
I tried to download a dll and copy is to sys/lib but it's a restricted directory.. Then I think i would create a SIS with type SISSYSTEM that install the dll's new version.
Is there a more efficient way? Is it possible to do in silently? Without user input and without exiting the application?

Thanks so much for your future help /comment/advice.

Julien

[skumar_rao]

If i am not wrong. In Symbian V9 you can't have a silent installation.

[david.caabeiro]

No, you'll need to rely on the installer app due to platform security, so using a sis file is the way to go. You can invoke the installer by means of RApaLsSession.

[symbianyucca]

and the MR 4 has APIs for silent installing as well..

yucca

[papana]

Hello,
you are right, there is anAPI in MR4 for silent install, but you need TrutUi capabilities and build with Armv5...
So i ll use all the sis parameter to do the applications updates.

Julien