tree 171b0a62a8fd9bb12a3468fa3717cc866aa15e36
parent c85b3a1bfb6d4981d483c88dbcfcf22acce33ffe
author Nelly Vouzoukidou <nellyv@google.com> 1547026867 +0100
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1547037906 +0000

[ledger] Avoid calling IsDirectoryAt twice, when getting a LevelDb.

LedgerStorageImpl::GetPageStorage would check if the directory at the
given path existed, in order to return NOT_FOUND if necessary. It would
then call DbFactory::GetOrCreateDb, which checked again if the directory
exists.

In this CL DbFactory::GetOrCreateDb is updated to support only getting
an existing Db, and fail with NOT_FOUND status if it doesn't exist.
This helps remove the extra call to IsDirectoryAt in LedgerStorageImpl.

Test: LevelDbFactoryTest.*
Change-Id: I6b97615179ceae2347e9403b17177f44ee4e1112