Add JobService to delete obsolete anomaly data

Bug: 72385333
Test: RunSettingsRoboTests
Change-Id: I73e16b9785fe0e832acc9e4256c8f9fd1333721e

src/com/android/settings/fuelgauge/batterytip/AnomalyCleanUpJobService.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.fuelgauge.batterytip;
+
+import android.app.job.JobInfo;
+import android.app.job.JobParameters;
+import android.app.job.JobScheduler;
+import android.app.job.JobService;
+import android.content.ComponentName;
+import android.content.Context;
+import android.os.AsyncTask;
+import android.support.annotation.VisibleForTesting;
+import android.util.Log;
+
+import com.android.settings.R;
+import com.android.settingslib.utils.ThreadUtils;
+
+import java.util.concurrent.TimeUnit;
+
+/** A JobService to clean up obsolete data in anomaly database */
+public class AnomalyCleanUpJobService extends JobService {
+    private static final String TAG = "AnomalyCleanUpJobService";
+
+    @VisibleForTesting
+    static final long CLEAN_UP_FREQUENCY_MS = TimeUnit.DAYS.toMillis(1);
+
+    public static void scheduleCleanUp(Context context) {
+        final JobScheduler jobScheduler = context.getSystemService(JobScheduler.class);
+
+        final ComponentName component = new ComponentName(context, AnomalyCleanUpJobService.class);
+        final JobInfo.Builder jobBuilder =
+                new JobInfo.Builder(R.id.job_anomaly_clean_up, component)
+                .setMinimumLatency(CLEAN_UP_FREQUENCY_MS)
+                .setRequiresDeviceIdle(true)
+                .setPersisted(true);
+
+        if (jobScheduler.schedule(jobBuilder.build()) != JobScheduler.RESULT_SUCCESS) {
+            Log.i(TAG, "Anomaly clean up job service schedule failed.");
+        }
+    }
+
+    @Override
+    public boolean onStartJob(JobParameters params) {
+        final BatteryDatabaseManager batteryDatabaseManager = BatteryDatabaseManager
+                .getInstance(this);
+        final BatteryTipPolicy policy = new BatteryTipPolicy(this);
+        ThreadUtils.postOnBackgroundThread(() -> {
+            batteryDatabaseManager.deleteAllAnomaliesBeforeTimeStamp(
+                    System.currentTimeMillis() - TimeUnit.HOURS.toMillis(
+                            policy.dataHistoryRetainHour));
+            jobFinished(params, false /* wantsReschedule */);
+        });
+
+        return true;
+    }
+
+    @Override
+    public boolean onStopJob(JobParameters jobParameters) {
+        return true;
+    }
+}

src/com/android/settings/fuelgauge/batterytip/AnomalyDetectionReceiver.java

@@ -36,7 +36,7 @@ public class AnomalyDetectionReceiver extends BroadcastReceiver {
 
     @Override
     public void onReceive(Context context, Intent intent) {
-        final BatteryDatabaseManager databaseManager = new BatteryDatabaseManager(context);
+        final BatteryDatabaseManager databaseManager = BatteryDatabaseManager.getInstance(context);
         final BatteryUtils batteryUtils = BatteryUtils.getInstance(context);
         final long configUid = intent.getLongExtra(StatsManager.EXTRA_STATS_CONFIG_UID, -1);
         final long configKey = intent.getLongExtra(StatsManager.EXTRA_STATS_CONFIG_KEY, -1);
@@ -46,6 +46,8 @@ public class AnomalyDetectionReceiver extends BroadcastReceiver {
         Log.i(TAG, "Anomaly intent received.  configUid = " + configUid + " configKey = "
                 + configKey + " subscriptionId = " + subscriptionId);
         saveAnomalyToDatabase(databaseManager, batteryUtils, intent);
+
+        AnomalyCleanUpJobService.scheduleCleanUp(context);
     }
 
     @VisibleForTesting

src/com/android/settings/fuelgauge/batterytip/BatteryTipPolicy.java

@@ -19,7 +19,6 @@ package com.android.settings.fuelgauge.batterytip;
 import android.content.Context;
 import android.provider.Settings;
 import android.support.annotation.VisibleForTesting;
-import android.text.format.DateUtils;
 import android.util.KeyValueListParser;
 import android.util.Log;
 
@@ -44,6 +43,7 @@ public class BatteryTipPolicy {
     private static final String KEY_REDUCED_BATTERY_PERCENT = "reduced_battery_percent";
     private static final String KEY_LOW_BATTERY_ENABLED = "low_battery_enabled";
     private static final String KEY_LOW_BATTERY_HOUR = "low_battery_hour";
+    private static final String KEY_DATA_HISTORY_RETAIN_HOUR = "data_history_retain_hour";
 
     /**
      * {@code true} if general battery tip is enabled
@@ -143,6 +143,14 @@ public class BatteryTipPolicy {
      */
     public final int lowBatteryHour;
 
+    /**
+     * TTL hour for anomaly data stored in database
+     *
+     * @see Settings.Global#BATTERY_TIP_CONSTANTS
+     * @see #KEY_DATA_HISTORY_RETAIN_HOUR
+     */
+    public final int dataHistoryRetainHour;
+
     private final KeyValueListParser mParser;
 
     public BatteryTipPolicy(Context context) {
@@ -174,6 +182,7 @@ public class BatteryTipPolicy {
         reducedBatteryPercent = mParser.getInt(KEY_REDUCED_BATTERY_PERCENT, 50);
         lowBatteryEnabled = mParser.getBoolean(KEY_LOW_BATTERY_ENABLED, false);
         lowBatteryHour = mParser.getInt(KEY_LOW_BATTERY_HOUR, 16);
+        dataHistoryRetainHour = mParser.getInt(KEY_DATA_HISTORY_RETAIN_HOUR, 72);
     }
 
 }