tree f7f587bd79ded235b6a823d0d31f58cc8809f11b
parent 32a26e54e99ab2e8acbdde53e24bed2da6e4dfc4
author Jonathan Amsterdam <jba@google.com> 1502368982 -0400
committer Jonathan Amsterdam <jba@google.com> 1502446708 +0000

datastore: add retry

As per https://cloud.google.com/datastore/docs/concepts/errors, we retry
on UNAVAILABLE and DEADLINE_EXCEEDED.

All the RPCs used are either idempotent or harmless to retry.

Fixes #652.

Change-Id: I27bf7c252a1a567ced598d0aec499205bd46322b
Reviewed-on: https://code-review.googlesource.com/15810
Reviewed-by: Michael Darakananda <pongad@google.com>