osgi - Blueprint property-placeholder provider -

in osgi blueprint can params property-placeholder <cm:property-placeholder persistent-id="id" update-strategy="reload"/>. but, these params loaded .cfg. need load params database, can set params provider property-placeholder?

the property-placeholder cm:property-placeholder can feed properties config admin. there no simple soltuion configuring xml.

there 3 ways achieve this:

1. you can write configadmin backend retrieves configs database.
2. you can write own blueprint namespace implements element property-placeholder element , retrieves configs database.
3. a simpler solution install bundle in runtime reads database , uses configurationadmin service create configs according database contents.

so opt 3rd solution. side effect of once have written configs there no outage if database goes down.