Execution engine

How it works

Execution feedback and/or errors

When an activity is being executed by the execution engine an observationlifecycle type is sent to the activity_lifecycle topic. Some events are reported through the property event, among this events:

• Start of a reasoner (start)
• End of a reasoner (end)
• Execution errors (error)

This is a strong mechanism you can use to trace the execution of your activities if, at a given moment, you think they are not function as intended.

Security context

• The reasoners get executed in the access control selected at reasoner's creation time
  • Observation access control
  • Entities access control

From observation or entities