Enforce uniqueness of flow/atom details uuids/keys

Bug #1423658 reported by Joshua Harlow
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Timofey Durakov

Bug Description

In the current *persistence* backends there is an implied rule that flow/atom details objects have unique uuids and should not conflict on these with any other flow/atom details (ever). Having an implied rule is not the best approach, and we should have checks in place (that raise exceptions) when a duplicate uuid is saved so that at run-time/save-time it blows up when this kind of conflict is triggered. This makes the rule explicit and validated; making bugs and issues less and makes the persistence behaviors that much more predictable/understandable...

Some solutions/ideas:

-> Rename uuid -> key (since its really a unique 'key') [this can be a later change if needed]
-> Have backends able to influence what is a 'valid' key/uuid (but have all implementations raise errors when duplicates are found)
-> Have backends validate uniqueness *before* saving any results (this is more applicable to backends that are not transactional, such as the filesystem backend; the sqlalchemy and zookeeper backend use transactions so checking later should be fine, since the transaction will not be committed until all validations have occurred).

Joshua Harlow (harlowja)
Changed in taskflow:
importance: Undecided → High
Changed in taskflow:
status: New → Confirmed
Changed in taskflow:
assignee: nobody → Timofey Durakov (tdurakov)
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