23033b0046709140355cf7062bc52611087a1b6c - platform/frameworks/base

commit	23033b0046709140355cf7062bc52611087a1b6c	[log] [tgz]
author	Varun Shah <varunshah@google.com>	Mon Oct 07 14:41:12 2019 -0700
committer	Varun Shah <varunshah@google.com>	Thu Oct 17 18:11:37 2019 -0700
tree	0c12e7d0d4ba4c84afd24e1b37af15a2bab2ca89
parent	358d5006234b1e5f0feb95f72ef42e592d28e661 [diff]

Do not retain UsageStats for uninstalled packages.

When packages are removed, remove their associated token mappings in the
packages token data stored in UsageStats. When data is being persisted
to disk, the data for removed packages will not be written to disk.
Additionally, when any of the query APIs are called, data that is read
from disk for which a mapping does not exist will not be returned.

The data deletion uses a lazy techinque to avoid heavy costs of reading
and writing all of the usage stats data on every package removal.

Bug: 135484470
Test: atest IntervalStatsTests
Test: atest UsageStatsDatabaseTest
Change-Id: Ie32d65b47f86071c6a814a8b21e4be060519e598

services/tests/servicestests/src/com/android/server/usage/UsageStatsDatabaseTest.java[diff]
services/usage/java/com/android/server/usage/IntervalStats.java[diff]
services/usage/java/com/android/server/usage/PackagesTokenData.java[diff]
services/usage/java/com/android/server/usage/UsageStatsDatabase.java[diff]
services/usage/java/com/android/server/usage/UsageStatsService.java[diff]
services/usage/java/com/android/server/usage/UserUsageStatsService.java[diff]
tests/UsageStatsPerfTests/src/com/android/frameworks/perftests/usage/tests/UsageStatsDatabasePerfTest.java[diff]

7 files changed