Add the ability to override time origin priorities (d1393790) · Commits · e / os / android_frameworks_base

core/java/android/app/timedetector/TimeDetector.java

+12 −0

Original line number	Diff line number	Diff line
		@@ -31,6 +31,18 @@ import android.os.TimestampedValue;
		@SystemService(Context.TIME_DETECTOR_SERVICE)
		public interface TimeDetector {

		/**
		* The name of the service for shell commands.
		* @hide
		*/
		String SHELL_COMMAND_SERVICE_NAME = "time_detector";

		/**
		* A shell command that prints the current "auto time detection" global setting value.
		* @hide
		*/
		String SHELL_COMMAND_IS_AUTO_DETECTION_ENABLED = "is_auto_detection_enabled";

		/**
		* A shared utility method to create a {@link ManualTimeSuggestion}.
		*

services/core/java/com/android/server/timedetector/EnvironmentImpl.java

+3 −0

Original line number	Diff line number	Diff line
		@@ -82,6 +82,9 @@ final class EnvironmentImpl implements TimeDetectorStrategyImpl.Environment {
		handleAutoTimeDetectionChangedOnHandlerThread();
		}
		});
		mServiceConfigAccessor.addListener(
		() -> mHandler.post(
		EnvironmentImpl.this::handleAutoTimeDetectionChangedOnHandlerThread));
		}

		/** Internal method for handling the auto time setting being changed. */

services/core/java/com/android/server/timedetector/ServerFlags.java

+22 −0

Original line number	Diff line number	Diff line
		@@ -135,6 +135,15 @@ public final class ServerFlags {
		public static final String KEY_LOCATION_TIME_ZONE_DETECTION_SETTING_ENABLED_DEFAULT =
		"location_time_zone_detection_setting_enabled_default";

		/**
		* The key to override the time detector origin priorities configuration. A comma-separated list
		* of strings that will be passed to {@link TimeDetectorStrategy#stringToOrigin(String)}.
		* All values must be recognized or the override value will be ignored.
		*/
		@DeviceConfigKey
		public static final String KEY_TIME_DETECTOR_ORIGIN_PRIORITIES_OVERRIDE =
		"time_detector_origin_priorities_override";

		@GuardedBy("mListeners")
		private final ArrayMap<ConfigurationChangeListener, Set<String>> mListeners = new ArrayMap<>();

		@@ -208,6 +217,19 @@ public final class ServerFlags {
		return Optional.ofNullable(value);
		}

		/**
		* Returns an optional string array value from {@link DeviceConfig} from the system_time
		* namespace, returns {@link Optional#empty()} if there is no explicit value set.
		*/
		@NonNull
		public Optional<String[]> getOptionalStringArray(@DeviceConfigKey String key) {
		Optional<String> string = getOptionalString(key);
		if (!string.isPresent()) {
		return Optional.empty();
		}
		return Optional.of(string.get().split(","));
		}

		/**
		* Returns an optional boolean value from {@link DeviceConfig} from the system_time
		* namespace, returns {@link Optional#empty()} if there is no explicit value set.

services/core/java/com/android/server/timedetector/ServiceConfigAccessor.java

+102 −17

Original line number	Diff line number	Diff line
		@@ -15,9 +15,9 @@
		*/
		package com.android.server.timedetector;

		import static com.android.server.timedetector.ServerFlags.KEY_TIME_DETECTOR_ORIGIN_PRIORITIES_OVERRIDE;
		import static com.android.server.timedetector.TimeDetectorStrategy.ORIGIN_NETWORK;
		import static com.android.server.timedetector.TimeDetectorStrategy.ORIGIN_TELEPHONY;
		import static com.android.server.timedetector.TimeDetectorStrategy.stringToOrigin;

		import android.annotation.NonNull;
		import android.annotation.Nullable;
		@@ -28,12 +28,17 @@ import android.util.ArraySet;

		import com.android.internal.R;
		import com.android.internal.annotations.GuardedBy;
		import com.android.internal.util.Preconditions;
		import com.android.server.timedetector.TimeDetectorStrategy.Origin;
		import com.android.server.timezonedetector.ConfigurationChangeListener;

		import java.time.Instant;
		import java.util.Arrays;
		import java.util.Collections;
		import java.util.Objects;
		import java.util.Optional;
		import java.util.Set;
		import java.util.function.Supplier;

		/**
		* A singleton that provides access to service configuration for time detection. This hides how
		@@ -48,7 +53,7 @@ final class ServiceConfigAccessor {
		* By default telephony and network only suggestions are accepted and telephony takes
		* precedence over network.
		*/
		private static final @TimeDetectorStrategy.Origin int[]
		private static final @Origin int[]
		DEFAULT_AUTOMATIC_TIME_ORIGIN_PRIORITIES = { ORIGIN_TELEPHONY, ORIGIN_NETWORK };

		/**
		@@ -60,6 +65,7 @@ final class ServiceConfigAccessor {

		private static final Set<String> SERVER_FLAGS_KEYS_TO_WATCH = Collections.unmodifiableSet(
		new ArraySet<>(new String[] {
		KEY_TIME_DETECTOR_ORIGIN_PRIORITIES_OVERRIDE,
		}));

		private static final Object SLOCK = new Object();
		@@ -70,8 +76,9 @@ final class ServiceConfigAccessor {
		private static ServiceConfigAccessor sInstance;

		@NonNull private final Context mContext;
		@NonNull private final ConfigOriginPrioritiesSupplier mConfigOriginPrioritiesSupplier;
		@NonNull private final ServerFlagsOriginPrioritiesSupplier mServerFlagsOriginPrioritiesSupplier;
		@NonNull private final ServerFlags mServerFlags;
		@NonNull private final int[] mOriginPriorities;

		/**
		* If a newly calculated system clock time and the current system clock time differs by this or
		@@ -83,7 +90,9 @@ final class ServiceConfigAccessor {
		private ServiceConfigAccessor(@NonNull Context context) {
		mContext = Objects.requireNonNull(context);
		mServerFlags = ServerFlags.getInstance(mContext);
		mOriginPriorities = getOriginPrioritiesInternal();
		mConfigOriginPrioritiesSupplier = new ConfigOriginPrioritiesSupplier(context);
		mServerFlagsOriginPrioritiesSupplier =
		new ServerFlagsOriginPrioritiesSupplier(mServerFlags);
		mSystemClockUpdateThresholdMillis =
		SystemProperties.getInt("ro.sys.time_detector_update_diff",
		SYSTEM_CLOCK_UPDATE_THRESHOLD_MILLIS_DEFAULT);
		@@ -111,8 +120,17 @@ final class ServiceConfigAccessor {
		}

		@NonNull
		int[] getOriginPriorities() {
		return mOriginPriorities;
		@Origin int[] getOriginPriorities() {
		int[] serverFlagsValue = mServerFlagsOriginPrioritiesSupplier.get();
		if (serverFlagsValue != null) {
		return serverFlagsValue;
		}

		int[] configValue = mConfigOriginPrioritiesSupplier.get();
		if (configValue != null) {
		return configValue;
		}
		return DEFAULT_AUTOMATIC_TIME_ORIGIN_PRIORITIES;
		}

		int systemClockUpdateThresholdMillis() {
		@@ -123,19 +141,86 @@ final class ServiceConfigAccessor {
		return TIME_LOWER_BOUND_DEFAULT;
		}

		private int[] getOriginPrioritiesInternal() {
		String[] originStrings =
		mContext.getResources().getStringArray(R.array.config_autoTimeSourcesPriority);
		if (originStrings.length == 0) {
		return DEFAULT_AUTOMATIC_TIME_ORIGIN_PRIORITIES;
		} else {
		int[] origins = new int[originStrings.length];
		for (int i = 0; i < originStrings.length; i++) {
		int origin = stringToOrigin(originStrings[i]);
		origins[i] = origin;
		/**
		* A base supplier of an array of time origin integers in priority order.
		* It handles memoization of the result to avoid repeated string parsing when nothing has
		* changed.
		*/
		private abstract static class BaseOriginPrioritiesSupplier implements Supplier<@Origin int[]> {
		@GuardedBy("this") @Nullable private String[] mLastPriorityStrings;
		@GuardedBy("this") @Nullable private int[] mLastPriorityInts;

		/** Returns an array of {@code ORIGIN_} values, or {@code null}. /
		@Override
		@Nullable
		public @Origin int[] get() {
		String[] priorityStrings = lookupPriorityStrings();
		synchronized (this) {
		if (Arrays.equals(mLastPriorityStrings, priorityStrings)) {
		return mLastPriorityInts;
		}

		int[] priorityInts = null;
		if (priorityStrings != null && priorityStrings.length > 0) {
		priorityInts = new int[priorityStrings.length];
		try {
		for (int i = 0; i < priorityInts.length; i++) {
		String priorityString = priorityStrings[i];
		Preconditions.checkArgument(priorityString != null);

		priorityString = priorityString.trim();
		priorityInts[i] = TimeDetectorStrategy.stringToOrigin(priorityString);
		}
		} catch (IllegalArgumentException e) {
		// If any strings were bad and they were ignored then the semantics of the
		// whole list could change, so return null.
		priorityInts = null;
		}
		}
		mLastPriorityStrings = priorityStrings;
		mLastPriorityInts = priorityInts;
		return priorityInts;
		}
		}

		@Nullable
		protected abstract String[] lookupPriorityStrings();
		}

		return origins;
		/** Supplies origin priorities from config_autoTimeSourcesPriority. */
		private static class ConfigOriginPrioritiesSupplier extends BaseOriginPrioritiesSupplier {

		@NonNull private final Context mContext;

		private ConfigOriginPrioritiesSupplier(Context context) {
		mContext = Objects.requireNonNull(context);
		}

		@Override
		@Nullable
		protected String[] lookupPriorityStrings() {
		return mContext.getResources().getStringArray(R.array.config_autoTimeSourcesPriority);
		}
		}

		/**
		* Supplies origin priorities from device_config (server flags), see
		* {@link ServerFlags#KEY_TIME_DETECTOR_ORIGIN_PRIORITIES_OVERRIDE}.
		*/
		private static class ServerFlagsOriginPrioritiesSupplier extends BaseOriginPrioritiesSupplier {

		@NonNull private final ServerFlags mServerFlags;

		private ServerFlagsOriginPrioritiesSupplier(ServerFlags serverFlags) {
		mServerFlags = Objects.requireNonNull(serverFlags);
		}

		@Override
		@Nullable
		protected String[] lookupPriorityStrings() {
		Optional<String[]> priorityStrings = mServerFlags.getOptionalStringArray(
		KEY_TIME_DETECTOR_ORIGIN_PRIORITIES_OVERRIDE);
		return priorityStrings.orElse(null);
		}
		}
		}

services/core/java/com/android/server/timedetector/TimeDetectorService.java

+11 −1

Original line number	Diff line number	Diff line
		@@ -30,6 +30,8 @@ import android.app.timedetector.TelephonyTimeSuggestion;
		import android.content.Context;
		import android.os.Binder;
		import android.os.Handler;
		import android.os.ResultReceiver;
		import android.os.ShellCallback;
		import android.util.IndentingPrintWriter;

		import com.android.internal.annotations.VisibleForTesting;
		@@ -100,6 +102,7 @@ public final class TimeDetectorService extends ITimeDetectorService.Stub {
		}

		@Override
		@NonNull
		public TimeCapabilitiesAndConfig getCapabilitiesAndConfig() {
		int userId = mCallerIdentityInjector.getCallingUserId();
		return getTimeCapabilitiesAndConfig(userId);
		@@ -119,7 +122,7 @@ public final class TimeDetectorService extends ITimeDetectorService.Stub {
		}

		@Override
		public boolean updateConfiguration(TimeConfiguration timeConfiguration) {
		public boolean updateConfiguration(@NonNull TimeConfiguration timeConfiguration) {
		enforceManageTimeDetectorPermission();
		// TODO(b/172891783) Add actual logic
		return false;
		@@ -180,6 +183,13 @@ public final class TimeDetectorService extends ITimeDetectorService.Stub {
		ipw.flush();
		}

		@Override
		public void onShellCommand(FileDescriptor in, FileDescriptor out, FileDescriptor err,
		String[] args, ShellCallback callback, ResultReceiver resultReceiver) {
		new TimeDetectorShellCommand(this).exec(
		this, in, out, err, args, callback, resultReceiver);
		}

		private void enforceSuggestTelephonyTimePermission() {
		mContext.enforceCallingPermission(
		android.Manifest.permission.SUGGEST_TELEPHONY_TIME_AND_ZONE,