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Adjust key/value backup scheduling

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We now try to perform key/value backups only while charging, proceeding
off-charger only after we've waited a full day for the device to be
plugged in.

Bug 21076663

Change-Id: Ib32c9f8bfaf8a310f5f388907e38a28d3c54bd8e
This commit is contained in:
Christopher Tate
2015-05-12 17:06:33 -07:00
committed by Chris Tate
parent cb81d18367
commit 3d7e0d8e21
1 changed files with 8 additions and 6 deletions
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14
services/backup/java/com/android/server/backup/KeyValueBackupJob.java
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@@ -38,16 +38,17 @@ public class KeyValueBackupJob extends JobService {
new ComponentName("android", KeyValueBackupJob.class.getName());
private static final int JOB_ID = 0x5039;
// Once someone asks for a backup, this is how long we hold off, batching
// up additional requests, before running the actual backup pass. Privileged
// callers can always trigger an immediate pass via BackupManager.backupNow().
// Minimum wait time between backups even while we're on charger
static final long BATCH_INTERVAL = 4 * AlarmManager.INTERVAL_HOUR;
// Random variation in next-backup scheduling time to avoid server load spikes
private static final int FUZZ_MILLIS = 10 * 60 * 1000;
// Don't let the job scheduler defer forever; give it a (lenient) deadline
private static final long MAX_DEFERRAL = 1 * AlarmManager.INTERVAL_HOUR;
// Once someone asks for a backup, this is how long we hold off until we find
// an on-charging opportunity. If we hit this max latency we will run the operation
// regardless. Privileged callers can always trigger an immediate pass via
// BackupManager.backupNow().
private static final long MAX_DEFERRAL = AlarmManager.INTERVAL_DAY;
private static boolean sScheduled = false;
private static long sNextScheduled = 0;
@@ -70,7 +71,8 @@ public class KeyValueBackupJob extends JobService {
JobInfo.Builder builder = new JobInfo.Builder(JOB_ID, sKeyValueJobService)
.setMinimumLatency(delay)
.setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY)
.setOverrideDeadline(delay + MAX_DEFERRAL);
.setRequiresCharging(true)
.setOverrideDeadline(MAX_DEFERRAL);
js.schedule(builder.build());
sNextScheduled = System.currentTimeMillis() + delay;