[FEO Weekly 2025-04-01]

[4og]

Participants

• @4og
• Ulrich Freund
• @hanky-qorix
• @pawelrutkaq
• @poeschel
• @FScholPer
• Arvid Sievert
• @vinodreddy-g
• @Saumya-R
• @prabakaranklst

Meeting Minutes

How is mw::com/Lola to be used for inter-activity communication from API perspective?

• It's not clear if mw::com provides topic type information. @FScholPer will bring into CFT Communication or check if there is a FEO-Communication meeting planned this week.

Is something like activity-configuration planned? In JSON?

• Currently, FEO has in-code configuration for the topics the activity is meant to read or to write. A better solution needed to avoid hard-coding topics in code. Example: https://github.com/eclipse-score/inc_feo/blob/main/examples/rust/feo-mini-adas/src/config.rs

A configuration file could look like this:

"activityId": "abc"
"inputTopics" : { // subscribers
  "/abc/abc1" : "Topic1",
  "/abc/abc2" : "Topic2"
},
"outputTopics" : { // publishers
  "/abc/abc3" : "Topic3",
  "/abc/abc4" : "Topic4"
}

Such configuration is useful, because it's possible to wire an activity instance to a different data source without changing the source code.
It's not clear, however, if it's wise to interleave with the configuration for the activity chain as it can result in a huge cluttered configuration file.

If the agenda allows, this will be discussed in the Architecture Workshop (https://github.com/orgs/eclipse-score/discussions/764)
The configuration topic is tracked as an issue in FEO Project: https://github.com/eclipse-score/inc_feo/issues/31

Other points regarding the configuration:

• Schema will be required for the configuration file.
• Terminology needs to be clarified. Should we use term "Topic" or "Event"?

Worst execution time for the activity chain needs to be defined.

• This could be part of the Eclipse S-CORE FEO Error Handling meeting on April 15 15:00 (ask @johannes-esr for invitation).

Tooling for activity execution monitoring is needed (eclipse-score/inc_feo#32). We should look into https://projects.eclipse.org/proposals/eclipse-pullpiri for adoption. Currently, FEO has integration with Perfetto, this looks like this: