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Commit d21b78c1 authored by shubang's avatar shubang Committed by Shubang Lu
Browse files

Use DeviceConfig in MediaMetricsManagerService 

Bug: 186764459
Test: atest MediaMetricsAtomTests
Change-Id: I1a4b0ce802973c5d96a6662f4315db10f08fee96
parent 55b9b53e

services/core/java/com/android/server/media/metrics/MediaMetricsManagerService.java

+54 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
package com.android.server.media.metrics;



import android.content.Context;

import android.content.pm.PackageManager;

import android.media.metrics.IMediaMetricsManager;

import android.media.metrics.NetworkEvent;

import android.media.metrics.PlaybackErrorEvent;
@@ -24,19 +25,29 @@ import android.media.metrics.PlaybackMetrics; 
import android.media.metrics.PlaybackStateEvent;

import android.media.metrics.TrackChangeEvent;

import android.os.Binder;

import android.provider.DeviceConfig;

import android.util.Base64;

import android.util.Slog;

import android.util.StatsEvent;

import android.util.StatsLog;



import com.android.server.SystemService;



import java.security.SecureRandom;

import java.util.ArrayList;

import java.util.List;



/**

 * System service manages media metrics.

 */

public final class MediaMetricsManagerService extends SystemService {

    private static final String TAG = "MediaMetricsManagerService";

    // TODO: update these constants when finalized

    private static final String MEDIA_METRICS_MODE = "media_metrics_mode";

    private static final int MEDIA_METRICS_MODE_OFF = 0;

    private static final int MEDIA_METRICS_MODE_ON = 1;

    private final SecureRandom mSecureRandom;

    private List<String> mBlockList = new ArrayList<>();



    /**

     * Initializes the playback metrics manager service.
@@ -56,6 +67,9 @@ public final class MediaMetricsManagerService extends SystemService { 
    private final class BinderService extends IMediaMetricsManager.Stub {

        @Override

        public void reportPlaybackMetrics(String sessionId, PlaybackMetrics metrics, int userId) {

            if (!shouldWriteStats()) {

                return;

            }

            StatsEvent statsEvent = StatsEvent.newBuilder()

                    .setAtomId(320)

                    .writeInt(Binder.getCallingUid())
@@ -85,6 +99,9 @@ public final class MediaMetricsManagerService extends SystemService { 
        @Override

        public void reportPlaybackStateEvent(

                String sessionId, PlaybackStateEvent event, int userId) {

            if (!shouldWriteStats()) {

                return;

            }

            StatsEvent statsEvent = StatsEvent.newBuilder()

                    .setAtomId(322)

                    .writeString(sessionId)
@@ -115,6 +132,9 @@ public final class MediaMetricsManagerService extends SystemService { 
        @Override

        public void reportPlaybackErrorEvent(

                String sessionId, PlaybackErrorEvent event, int userId) {

            if (!shouldWriteStats()) {

                return;

            }

            StatsEvent statsEvent = StatsEvent.newBuilder()

                    .setAtomId(323)

                    .writeString(sessionId)
@@ -129,6 +149,9 @@ public final class MediaMetricsManagerService extends SystemService { 


        public void reportNetworkEvent(

                String sessionId, NetworkEvent event, int userId) {

            if (!shouldWriteStats()) {

                return;

            }

            StatsEvent statsEvent = StatsEvent.newBuilder()

                    .setAtomId(321)

                    .writeString(sessionId)
@@ -142,6 +165,9 @@ public final class MediaMetricsManagerService extends SystemService { 
        @Override

        public void reportTrackChangeEvent(

                String sessionId, TrackChangeEvent event, int userId) {

            if (!shouldWriteStats()) {

                return;

            }

            StatsEvent statsEvent = StatsEvent.newBuilder()

                    .setAtomId(324)

                    .writeString(sessionId)
@@ -164,5 +190,33 @@ public final class MediaMetricsManagerService extends SystemService { 
                    .build();

            StatsLog.write(statsEvent);

        }



        private boolean shouldWriteStats() {

            int uid = Binder.getCallingUid();



            final long identity = Binder.clearCallingIdentity();

            int mode = DeviceConfig.getInt(

                    DeviceConfig.NAMESPACE_MEDIA, MEDIA_METRICS_MODE, MEDIA_METRICS_MODE_OFF);

            Binder.restoreCallingIdentity(identity);



            if (mode != MEDIA_METRICS_MODE_ON) {

                return false;

            }

            if (mBlockList.isEmpty()) {

                return true;

            }



            PackageManager pm = getContext().getPackageManager();

            String[] packages = pm.getPackagesForUid(uid);

            if (packages == null) {

                // The valid application UID range is from android.os.Process.FIRST_APPLICATION_UID

                // to android.os.Process.LAST_APPLICATION_UID.

                // UIDs outside this range will not have a package and will therefore be false.

                Slog.d(TAG, "null package from uid " + uid);

                return false;

            }

            // TODO: check calling package with allowlist/blocklist.

            return true;

        }

    }

}