Loading system properties early in the boot process

[jprio]

Hi,

I have to load system properties (thru a call to a SOAP Service) early enough in the boot process so that other subsystems (e.g. jca, jms) can use those properties to replace placeholders in configurations (e.g. : <connection-url>${db.url}</connection-url>). I don't want to pass those properties with -D on command line because the list can be quiet long (and because loading properties from a configuration server is the standard in our company).

Any hints on how to do that ?

Thanx.

[nickarls]

Can you use script that uses wget + some parsing to populate the system environment before the AS startup script is called?

[jprio]

Thank you for your answer. However, with a script, I can't reload those properties whenever they change. I thought rather to some kind of subsystem I can reload during runtime. I tried to read "https://docs.jboss.org/author/display/AS72/Extending+JBoss+AS+7", but it is not clear to me where I have to implement my call (initialize method of my extension, populateModel or performBoottime of my AbstractBoottimeAddStepHandler, ... ?).

[nickarls]

I meant that the script would be called every time as a part of booting the AS (before standalone.sh)

[ctomc]

Jean-Pierre RIO wrote:

Thank you for your answer. However, with a script, I can't reload those properties whenever they change. I thought rather to some kind of subsystem I can reload during runtime. I tried to read "https://docs.jboss.org/author/display/AS72/Extending+JBoss+AS+7", but it is not clear to me where I have to implement my call (initialize method of my extension, populateModel or performBoottime of my AbstractBoottimeAddStepHandler, ... ?).

in AbstractBoottimeAddStepHandler#performBoottime

[sfcoy]

Jean-Pierre RIO wrote:

... However, with a script, I can't reload those properties whenever they change. I thought rather to some kind of subsystem I can reload during runtime. ...

I think this is a tall order. You will have to restart so many subsystems that you may as well just restart the whole server (with a script?).

[nickarls]

Even if the parameters change, they should remain constant during the start-to-stop-lifecycle of the AS right?

[ctomc]

Nicklas Karlsson wrote:

Even if the parameters change, they should remain constant during the start-to-stop-lifecycle of the AS right?

yes.

any property that gets set during boot time / model phase will be properly resolved and used.

resolving and using of property occurs later on in "runtime phase"

[jprio]

AbstractBoottimeAddStepHandler#performBoottime seem's ok. We will have to manage now how to reload a ds to reflect the new configuration.

Thanks for your help.

[nickarls]

Sounds a bit dangerous with someone fiddling with the configuration server and suddenly the test-datasources point to production

[sgfitzs]

Try adding the system propery in domain.conf.bat. Worked for me.