App Standby : Association between content providers and their sync adapter

Set sync adapters to active if the associated content providers are used
at foreground process state.

Minimize how frequently published content providers are reported by
keeping track of last reported time.

Also cache sync adapters associated with an authority in SyncManager.

Bug: 21785111
Change-Id: Ic2c8cb6a27f005d1a1d0aad21d36b1510160753a

1 files changed, 47 insertions, 1 deletions

diff --git a/services/usage/java/com/android/server/usage/UsageStatsService.java b/services/usage/java/com/android/server/usage/UsageStatsService.java
index 3767fce..3b7ed91 100644
--- a/services/usage/java/com/android/server/usage/UsageStatsService.java
+++ b/services/usage/java/com/android/server/usage/UsageStatsService.java
@@ -31,9 +31,12 @@ import android.app.usage.UsageStatsManagerInternal.AppIdleStateChangeListener;
 import android.appwidget.AppWidgetManager;
 import android.content.BroadcastReceiver;
 import android.content.ComponentName;
+import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.content.SyncAdapterType;
+import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ParceledListSlice;
@@ -69,6 +72,7 @@ import android.view.Display;
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.app.IBatteryStats;
 import com.android.internal.os.BackgroundThread;
+import com.android.internal.os.SomeArgs;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.server.DeviceIdleController;
 import com.android.server.SystemService;
@@ -117,6 +121,7 @@ public class UsageStatsService extends SystemService implements
     static final int MSG_CHECK_IDLE_STATES = 5;
     static final int MSG_CHECK_PAROLE_TIMEOUT = 6;
     static final int MSG_PAROLE_END_TIMEOUT = 7;
+    static final int MSG_REPORT_CONTENT_PROVIDER_USAGE = 8;
 
     private final Object mLock = new Object();
     Handler mHandler;
@@ -583,6 +588,29 @@ public class UsageStatsService extends SystemService implements
         }
     }
 
+    void reportContentProviderUsage(String authority, String providerPkgName, int userId) {
+        // Get sync adapters for the authority
+        String[] packages = ContentResolver.getSyncAdapterPackagesForAuthorityAsUser(
+                authority, userId);
+        for (String packageName: packages) {
+            // Only force the sync adapters to active if the provider is not in the same package and
+            // the sync adapter is a system package.
+            try {
+                PackageInfo pi = AppGlobals.getPackageManager().getPackageInfo(
+                        packageName, 0, userId);
+                if (pi == null || pi.applicationInfo == null
+                        || !pi.applicationInfo.isSystemApp()) {
+                    continue;
+                }
+                if (!packageName.equals(providerPkgName)) {
+                    forceIdleState(packageName, userId, false);
+                }
+            } catch (RemoteException re) {
+                // Shouldn't happen
+            }
+        }
+    }
+
     /**
      * Forces the app's beginIdleTime and lastUsedTime to reflect idle or active. If idle,
      * then it rolls back the beginIdleTime and lastUsedTime to a point in time that's behind
@@ -605,7 +633,7 @@ public class UsageStatsService extends SystemService implements
                     timeNow - (idle ? mAppIdleWallclockThresholdMillis : 0) - 5000);
             // Inform listeners if necessary
             if (previouslyIdle != idle) {
-                // Slog.d(TAG, "Informing listeners of out-of-idle " + event.mPackage);
+                // Slog.d(TAG, "Informing listeners of out-of-idle " + packageName);
                 mHandler.sendMessage(mHandler.obtainMessage(MSG_INFORM_LISTENERS, userId,
                         /* idle = */ idle ? 1 : 0, packageName));
                 if (!idle) {
@@ -916,6 +944,14 @@ public class UsageStatsService extends SystemService implements
                     setAppIdleParoled(false);
                     break;
 
+                case MSG_REPORT_CONTENT_PROVIDER_USAGE:
+                    SomeArgs args = (SomeArgs) msg.obj;
+                    reportContentProviderUsage((String) args.arg1, // authority name
+                            (String) args.arg2, // package name
+                            (int) args.arg3); // userId
+                    args.recycle();
+                    break;
+
                 default:
                     super.handleMessage(msg);
                     break;
@@ -1177,6 +1213,16 @@ public class UsageStatsService extends SystemService implements
         }
 
         @Override
+        public void reportContentProviderUsage(String name, String packageName, int userId) {
+            SomeArgs args = SomeArgs.obtain();
+            args.arg1 = name;
+            args.arg2 = packageName;
+            args.arg3 = userId;
+            mHandler.obtainMessage(MSG_REPORT_CONTENT_PROVIDER_USAGE, args)
+                    .sendToTarget();
+        }
+
+        @Override
         public boolean isAppIdle(String packageName, int userId) {
             return UsageStatsService.this.isAppIdleFiltered(packageName, userId, -1);
         }