Kevin Benton 143b19c8d5 Separate exception class for retriables in callbacks ... There are various places where we emit a callback to allow subscribers to do validation or additional bookkeeping during the various life-cycle events of objects. However, a subscriber can encounter a DB Deadlock, StaleDataError or other retriable error that just needs the transaction to be restarted. In the rest of the Neutron code these exceptions bubble up to the API layer where the whole request is restarted. However, the exception catching for the callbacks in various places was preventing these errors from being retried because they were lost in conversion. This patch has the callback manager convert retriable exceptions into RetryRequest exceptions that will not be caught by handlers of CallbackError so by default it will bubble up to the API layer and be retried. 'notify' callers can avoid this behavior by additionally catching RetryRequest. Closes-Bug: #1590316 Change-Id: I6732c60f89de4318b5f56327c5bc966bd250baae		2016-06-22 23:03:09 +00:00
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__init__.py	Add callbacks-based system to Neutron	2015-02-25 06:11:59 -08:00
test_manager.py	Separate exception class for retriables in callbacks	2016-06-22 23:03:09 +00:00