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/*
* 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.server.timedetector;
import android.annotation.NonNull;
import android.annotation.UserIdInt;
import android.app.AlarmManager;
import android.content.ContentResolver;
import android.content.Context;
import android.database.ContentObserver;
import android.os.Build;
import android.os.Handler;
import android.os.PowerManager;
import android.os.SystemClock;
import android.os.UserHandle;
import android.os.UserManager;
import android.provider.Settings;
import android.util.Slog;
import com.android.internal.annotations.GuardedBy;
import com.android.server.timezonedetector.ConfigurationChangeListener;
import java.time.Instant;
import java.util.Objects;
/**
* The real implementation of {@link TimeDetectorStrategyImpl.Environment} used on device.
*/
final class EnvironmentImpl implements TimeDetectorStrategyImpl.Environment {
private static final String LOG_TAG = TimeDetectorService.TAG;
@NonNull private final Context mContext;
@NonNull private final Handler mHandler;
@NonNull private final ServiceConfigAccessor mServiceConfigAccessor;
@NonNull private final ContentResolver mContentResolver;
@NonNull private final PowerManager.WakeLock mWakeLock;
@NonNull private final AlarmManager mAlarmManager;
@NonNull private final UserManager mUserManager;
// @NonNull after setConfigChangeListener() is called.
@GuardedBy("this")
private ConfigurationChangeListener mConfigChangeListener;
EnvironmentImpl(@NonNull Context context, @NonNull Handler handler,
@NonNull ServiceConfigAccessor serviceConfigAccessor) {
mContext = Objects.requireNonNull(context);
mContentResolver = Objects.requireNonNull(context.getContentResolver());
mHandler = Objects.requireNonNull(handler);
mServiceConfigAccessor = Objects.requireNonNull(serviceConfigAccessor);
PowerManager powerManager = context.getSystemService(PowerManager.class);
mWakeLock = Objects.requireNonNull(
powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, LOG_TAG));
mAlarmManager = Objects.requireNonNull(context.getSystemService(AlarmManager.class));
mUserManager = Objects.requireNonNull(context.getSystemService(UserManager.class));
// Wire up the config change listeners. All invocations are performed on the mHandler
// thread.
ContentResolver contentResolver = context.getContentResolver();
contentResolver.registerContentObserver(
Settings.Global.getUriFor(Settings.Global.AUTO_TIME), true,
new ContentObserver(mHandler) {
@Override
public void onChange(boolean selfChange) {
handleAutoTimeDetectionChangedOnHandlerThread();
}
});
mServiceConfigAccessor.addListener(
() -> mHandler.post(
EnvironmentImpl.this::handleAutoTimeDetectionChangedOnHandlerThread));
}
/** Internal method for handling the auto time setting being changed. */
private void handleAutoTimeDetectionChangedOnHandlerThread() {
synchronized (this) {
if (mConfigChangeListener == null) {
Slog.wtf(LOG_TAG, "mConfigChangeListener is unexpectedly null");
}
mConfigChangeListener.onChange();
}
}
@Override
public void setConfigChangeListener(@NonNull ConfigurationChangeListener listener) {
synchronized (this) {
mConfigChangeListener = Objects.requireNonNull(listener);
}
}
@Override
public int systemClockUpdateThresholdMillis() {
return mServiceConfigAccessor.systemClockUpdateThresholdMillis();
}
@Override
public boolean isAutoTimeDetectionEnabled() {
try {
return Settings.Global.getInt(mContentResolver, Settings.Global.AUTO_TIME) != 0;
} catch (Settings.SettingNotFoundException snfe) {
return true;
}
}
@Override
public Instant autoTimeLowerBound() {
return mServiceConfigAccessor.autoTimeLowerBound();
}
@Override
public int[] autoOriginPriorities() {
return mServiceConfigAccessor.getOriginPriorities();
}
@Override
public ConfigurationInternal configurationInternal(@UserIdInt int userId) {
return new ConfigurationInternal.Builder(userId)
.setUserConfigAllowed(isUserConfigAllowed(userId))
.setAutoDetectionEnabled(isAutoTimeDetectionEnabled())
.build();
}
@Override
public void acquireWakeLock() {
if (mWakeLock.isHeld()) {
Slog.wtf(LOG_TAG, "WakeLock " + mWakeLock + " already held");
}
mWakeLock.acquire();
}
@Override
public long elapsedRealtimeMillis() {
return SystemClock.elapsedRealtime();
}
@Override
public long systemClockMillis() {
return System.currentTimeMillis();
}
@Override
public void setSystemClock(long newTimeMillis) {
checkWakeLockHeld();
mAlarmManager.setTime(newTimeMillis);
}
@Override
public void releaseWakeLock() {
checkWakeLockHeld();
mWakeLock.release();
}
@Override
public boolean deviceHasY2038Issue() {
return Build.SUPPORTED_32_BIT_ABIS.length > 0;
}
private void checkWakeLockHeld() {
if (!mWakeLock.isHeld()) {
Slog.wtf(LOG_TAG, "WakeLock " + mWakeLock + " not held");
}
}
private boolean isUserConfigAllowed(@UserIdInt int userId) {
UserHandle userHandle = UserHandle.of(userId);
return !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_DATE_TIME, userHandle);
}
}
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