Sorry for the English.

You most probably do not need real time OLAP. All that you requested is re-processing of some objects after XXX minutes since the last changes in your OLTP database. I am not sure which tools could do this trick automatically for you, but at first sight here is what i would do if such tools did not exist at all.

I would:

1. Write a program, which would be able to process OLAP objects. Writing such a program is possible with DSO.

2. Have a separate table on SQL server to list the tasks for program 1. The program would timely read the contents of that table and schedule processing through DSO after some time has happened.

3. From SQL triggers populate (and delete old records) that table 2 depending on the kind of change.

It is possible to call COM objects from triggers but i would not do this because in case if your COM server is out of process it would kill performance of SQL server. Manipulation through separate table is probably the fastest and convenient to do in terms of T-SQL.

SQL server also has scheduled tasks. Probably you can manipulate them from triggers.

Again, probably there is a way without coding, but if not - it is doable.