| commit | 7d5a77184483bb24eb1335359d01dfbf356daa99 | [log] [tgz] |
|---|---|---|
| author | David Ostrovsky <david@ostrovsky.org> | Sun Nov 16 18:48:50 2014 +0100 |
| committer | Edwin Kempin <ekempin@google.com> | Fri Oct 30 11:38:30 2015 +0100 |
| tree | 359a92d983fce774d8d12fa391c7d08186c80ac9 | |
| parent | ddd8ec8d0680348dcb9edf3fcc9fdb87376e8acf [diff] |
Replace ACCOUNT_DIFF_PREFERENCES table with Git backend (part1)
Replace the usage of AccountDiffPreference with a different class in
extension API package.
Data is saved optimized in Git backend: default values are discarded
during save operation and restored during read operation; so that
this optimization step is transparent for the callers.
For example when only one setting, theme in this case, differs from
the default value, only this value is written into diff section in
preferences.config file:
+[diff]
+ theme = eclipse
To support live migration, the upgrade is done in two steps:
* part1 (this change):
o Always write to both git and db
o Introduce new configuration option to indicate whether to read from
git or db, initially set to read from db
o First binary update: some servers are reading/writing just the db;
some servers are additionally writing to git
o After first update: all servers are reading from the db, writing to
both
o Batch copy data from db to git (only related to non open source
Gerrit version)
o Update all servers to read from git. During the update, some will
still be reading from the db; that's ok, because everybody is
writing to git
* part2 (next change):
o Bump database version, migrate the data from db to git, delete the
table (and the flag) from the code and update the servers.
Change-Id: I30a6d82f4a8d0c33ae9bb26d7f93c66bd0cb8bee
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