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aee4f7acc2
It was buggy (didn't work) and was never actually used. Why never actually used: for it to be used executeWithLock has to be called with different requesters on the same lockId. That never happend in the code. How it was buggy: Logically, the queue is deleted on release of the lock (meaning it was meaningless the only time it mattered - when the lock isn't taken). In addition, a different bug meant that having items in the queue prevented the lock from being released forcing all other tasks to have to wait for lock timeout even if the task that acquired the lock is long done. Alternative: fix the queue. This would mean we don't want to delete the lock on release (since we want to keep the queue). Instead, we resave the same lock with expiration date being START_OF_TIME. In addition - we need to fix the .equals used to determine if the lock the same as the acquired lock - instead use some isSame function that ignores the queue. Note: the queue is dangerous! An item (calling class / action) in the first place of a queue means no other calling class can get that lock. Everything is waiting for the first calling class to be re-run - but that might take a long time (depending on that action's rerun policy) and even might never happen (if for some reason that action decided it was no longer needed without acquiring the lock) - causing all other actions to stall forever! ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=163705463 |
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