CRUD observations

Crud observations are produced when a thing type is created, updated or deleted

• the observations is sent if:
  • the thing type produces CRUD or if the activity has the thing type in the list of CRUD producers.
  • the thing instance has a valid status (not draft)
• The CRUD observations are sent to the topic /crud/<thingType> example "topic": "/crud/endCustomer"
• For Followers, crud observations are sent only if the follower is an admin
• For things of type AmtechM2mBridge, the CRUD observation of a DELETE operation is not generated (for consistency with the logic that the deletion of a bridge deletes the topic /amtechM2mBridge where the crud observations for the bridge and its instances are)
• Crud observations are only sent if the value of a property change. If the same value is updated, the crud is not sent. For properties of type collection such as the guest tenant or guest users, the content of the list if analyzed to determine if it changed. So an update of guest tenants [tenant1, tenant2] to [tenant2, tenant1] will not generate a crud observation.
• When creating things with a topology execution using a reasoner, are created via a PUT operation with the parameter createIfNotExist=true, so the crud observation generated will have the operation PUT
• When deleting multiple things at the same time via the platform UI, crud observations are not sent. They are only sent when deleting one resource at a time.
• DELETE of bridges won't generate crud observations