Topic

Synchronization readout of properties: how to make synchronized monitors of 2 or more properties?

Example

I have a BACI property (Alt), and another (Az). I'd like to have both the same trigger / timestamp because they are naturally belonging together.

It seems that the only solution is to pack the data in an unnatural sequence. And we should depart from standard SXD to label what is in each sequence entry.
This doesn't work if the two types are different, e.g. String and float

Add a BACI c-style structure type to ACS
Synchronized triggers at the component level - how? (devIO, other).
- Extend completion with 2 timestamps, 2nd one being source timestamp should be easy at least for Java/Python.
Set synchronization via client/callback?
Use the "Sampling System" overkill?
Notification channel – The preferred way in ALMA used for scientific flow
Using a STRING property and serialize and deserialize - could work in low frequency
CORBA Method/query + Reading the source data source.

Chaining timestamps from the source to properties - instead of generating them by ACS.
Out of the box only works by using a sequence
Using the time as another property - needs the correlation with another property
longlongSeq? (and ulongLongSeq) sequences could be extended in ACS - probably not complicated but not existing
could encode in a longLong and use 2 parts, 32 bit for value and 32 for timestamps - for high frequency