Introduce a Lifecycle for system services

Provide an abstract class for system services to extend from,
similar to the android.app.Service.

This will allow services to receive events in a uniform way,
and will allow services to be created and started in the
correct order regardless of whether or not a particular
service exists.

Similar to android.app.Service, services are meant to implement
Binder interfaces as inner classes. This prevents services from
having incestuous access to each other and makes them use the
public API.

Change-Id: Iaacfee8d5f080a28d7cc606761f4624673ed390f

1 files changed, 148 insertions, 138 deletions

diff --git a/services/java/com/android/server/UiModeManagerService.java b/services/java/com/android/server/UiModeManagerService.java
index 062be01ab26a..de912dcc1332 100644
--- a/services/java/com/android/server/UiModeManagerService.java
+++ b/services/java/com/android/server/UiModeManagerService.java
@@ -34,9 +34,9 @@ import android.content.res.Configuration;
 import android.os.BatteryManager;
 import android.os.Binder;
 import android.os.Handler;
+import android.os.IBinder;
 import android.os.PowerManager;
 import android.os.RemoteException;
-import android.os.ServiceManager;
 import android.os.UserHandle;
 import android.provider.Settings;
 import android.service.dreams.Sandman;
@@ -47,9 +47,11 @@ import java.io.PrintWriter;
 
 import com.android.internal.R;
 import com.android.internal.app.DisableCarModeActivity;
-import com.android.server.TwilightService.TwilightState;
+import com.android.server.twilight.TwilightListener;
+import com.android.server.twilight.TwilightManager;
+import com.android.server.twilight.TwilightState;
 
-final class UiModeManagerService extends IUiModeManager.Stub {
+final class UiModeManagerService extends SystemService {
     private static final String TAG = UiModeManager.class.getSimpleName();
     private static final boolean LOG = false;
 
@@ -57,40 +59,36 @@ final class UiModeManagerService extends IUiModeManager.Stub {
     private static final boolean ENABLE_LAUNCH_CAR_DOCK_APP = true;
     private static final boolean ENABLE_LAUNCH_DESK_DOCK_APP = true;
 
-    private final Context mContext;
-    private final TwilightService mTwilightService;
-    private final Handler mHandler = new Handler();
-
     final Object mLock = new Object();
-
     private int mDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
+
     private int mLastBroadcastState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
+    int mNightMode = UiModeManager.MODE_NIGHT_NO;
 
-    private int mNightMode = UiModeManager.MODE_NIGHT_NO;
     private boolean mCarModeEnabled = false;
     private boolean mCharging = false;
-    private final int mDefaultUiModeType;
-    private final boolean mCarModeKeepsScreenOn;
-    private final boolean mDeskModeKeepsScreenOn;
-    private final boolean mTelevision;
-
+    private int mDefaultUiModeType;
+    private boolean mCarModeKeepsScreenOn;
+    private boolean mDeskModeKeepsScreenOn;
+    private boolean mTelevision;
     private boolean mComputedNightMode;
-    private int mCurUiMode = 0;
-    private int mSetUiMode = 0;
 
+    int mCurUiMode = 0;
+    private int mSetUiMode = 0;
     private boolean mHoldingConfiguration = false;
+
     private Configuration mConfiguration = new Configuration();
+    boolean mSystemReady;
 
-    private boolean mSystemReady;
+    private final Handler mHandler = new Handler();
 
+    private TwilightManager mTwilightManager;
     private NotificationManager mNotificationManager;
-
     private StatusBarManager mStatusBarManager;
 
-    private final PowerManager mPowerManager;
-    private final PowerManager.WakeLock mWakeLock;
+    private PowerManager.WakeLock mWakeLock;
 
-    static Intent buildHomeIntent(String category) {
+    private static Intent buildHomeIntent(String category) {
         Intent intent = new Intent(Intent.ACTION_MAIN);
         intent.addCategory(category);
         intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
@@ -142,28 +140,26 @@ final class UiModeManagerService extends IUiModeManager.Stub {
         }
     };
 
-    private final TwilightService.TwilightListener mTwilightListener =
-            new TwilightService.TwilightListener() {
+    private final TwilightListener mTwilightListener = new TwilightListener() {
         @Override
         public void onTwilightStateChanged() {
             updateTwilight();
         }
     };
 
-    public UiModeManagerService(Context context, TwilightService twilight) {
-        mContext = context;
-        mTwilightService = twilight;
-
-        ServiceManager.addService(Context.UI_MODE_SERVICE, this);
-
-        mContext.registerReceiver(mDockModeReceiver,
+    @Override
+    public void onStart() {
+        final Context context = getContext();
+        mTwilightManager = getLocalService(TwilightManager.class);
+        final PowerManager powerManager =
+                (PowerManager) context.getSystemService(Context.POWER_SERVICE);
+        mWakeLock = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK, TAG);
+
+        context.registerReceiver(mDockModeReceiver,
                 new IntentFilter(Intent.ACTION_DOCK_EVENT));
-        mContext.registerReceiver(mBatteryReceiver,
+        context.registerReceiver(mBatteryReceiver,
                 new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
 
-        mPowerManager = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
-        mWakeLock = mPowerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK, TAG);
-
         mConfiguration.setToDefaults();
 
         mDefaultUiModeType = context.getResources().getInteger(
@@ -175,101 +171,139 @@ final class UiModeManagerService extends IUiModeManager.Stub {
         mTelevision = context.getPackageManager().hasSystemFeature(
                 PackageManager.FEATURE_TELEVISION);
 
-        mNightMode = Settings.Secure.getInt(mContext.getContentResolver(),
+        mNightMode = Settings.Secure.getInt(context.getContentResolver(),
                 Settings.Secure.UI_NIGHT_MODE, UiModeManager.MODE_NIGHT_AUTO);
 
-        mTwilightService.registerListener(mTwilightListener, mHandler);
+        mTwilightManager.registerListener(mTwilightListener, mHandler);
+
+        publishBinderService(Context.UI_MODE_SERVICE, mService);
     }
 
-    @Override // Binder call
-    public void disableCarMode(int flags) {
-        final long ident = Binder.clearCallingIdentity();
-        try {
-            synchronized (mLock) {
-                setCarModeLocked(false);
-                if (mSystemReady) {
-                    updateLocked(0, flags);
+    private final IBinder mService = new IUiModeManager.Stub() {
+        @Override
+        public void enableCarMode(int flags) {
+            final long ident = Binder.clearCallingIdentity();
+            try {
+                synchronized (mLock) {
+                    setCarModeLocked(true);
+                    if (mSystemReady) {
+                        updateLocked(flags, 0);
+                    }
                 }
+            } finally {
+                Binder.restoreCallingIdentity(ident);
             }
-        } finally {
-            Binder.restoreCallingIdentity(ident);
         }
-    }
 
-    @Override // Binder call
-    public void enableCarMode(int flags) {
-        final long ident = Binder.clearCallingIdentity();
-        try {
-            synchronized (mLock) {
-                setCarModeLocked(true);
-                if (mSystemReady) {
-                    updateLocked(flags, 0);
+        @Override
+        public void disableCarMode(int flags) {
+            final long ident = Binder.clearCallingIdentity();
+            try {
+                synchronized (mLock) {
+                    setCarModeLocked(false);
+                    if (mSystemReady) {
+                        updateLocked(0, flags);
+                    }
                 }
+            } finally {
+                Binder.restoreCallingIdentity(ident);
             }
-        } finally {
-            Binder.restoreCallingIdentity(ident);
         }
-    }
 
-    @Override // Binder call
-    public int getCurrentModeType() {
-        final long ident = Binder.clearCallingIdentity();
-        try {
-            synchronized (mLock) {
-                return mCurUiMode & Configuration.UI_MODE_TYPE_MASK;
+        @Override
+        public int getCurrentModeType() {
+            final long ident = Binder.clearCallingIdentity();
+            try {
+                synchronized (mLock) {
+                    return mCurUiMode & Configuration.UI_MODE_TYPE_MASK;
+                }
+            } finally {
+                Binder.restoreCallingIdentity(ident);
             }
-        } finally {
-            Binder.restoreCallingIdentity(ident);
         }
-    }
 
-    @Override // Binder call
-    public void setNightMode(int mode) {
-        switch (mode) {
-            case UiModeManager.MODE_NIGHT_NO:
-            case UiModeManager.MODE_NIGHT_YES:
-            case UiModeManager.MODE_NIGHT_AUTO:
-                break;
-            default:
-                throw new IllegalArgumentException("Unknown mode: " + mode);
+        @Override
+        public void setNightMode(int mode) {
+            switch (mode) {
+                case UiModeManager.MODE_NIGHT_NO:
+                case UiModeManager.MODE_NIGHT_YES:
+                case UiModeManager.MODE_NIGHT_AUTO:
+                    break;
+                default:
+                    throw new IllegalArgumentException("Unknown mode: " + mode);
+            }
+
+            final long ident = Binder.clearCallingIdentity();
+            try {
+                synchronized (mLock) {
+                    if (isDoingNightModeLocked() && mNightMode != mode) {
+                        Settings.Secure.putInt(getContext().getContentResolver(),
+                                Settings.Secure.UI_NIGHT_MODE, mode);
+                        mNightMode = mode;
+                        updateLocked(0, 0);
+                    }
+                }
+            } finally {
+                Binder.restoreCallingIdentity(ident);
+            }
         }
 
-        final long ident = Binder.clearCallingIdentity();
-        try {
+        @Override
+        public int getNightMode() {
             synchronized (mLock) {
-                if (isDoingNightModeLocked() && mNightMode != mode) {
-                    Settings.Secure.putInt(mContext.getContentResolver(),
-                            Settings.Secure.UI_NIGHT_MODE, mode);
-                    mNightMode = mode;
-                    updateLocked(0, 0);
-                }
+                return mNightMode;
             }
-        } finally {
-            Binder.restoreCallingIdentity(ident);
         }
-    }
 
-    @Override // Binder call
-    public int getNightMode() {
+        @Override
+        protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
+            if (getContext().checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
+                    != PackageManager.PERMISSION_GRANTED) {
+
+                pw.println("Permission Denial: can't dump uimode service from from pid="
+                        + Binder.getCallingPid()
+                        + ", uid=" + Binder.getCallingUid());
+                return;
+            }
+
+            dumpImpl(pw);
+        }
+    };
+
+    void dumpImpl(PrintWriter pw) {
         synchronized (mLock) {
-            return mNightMode;
+            pw.println("Current UI Mode Service state:");
+            pw.print("  mDockState="); pw.print(mDockState);
+                    pw.print(" mLastBroadcastState="); pw.println(mLastBroadcastState);
+            pw.print("  mNightMode="); pw.print(mNightMode);
+                    pw.print(" mCarModeEnabled="); pw.print(mCarModeEnabled);
+                    pw.print(" mComputedNightMode="); pw.println(mComputedNightMode);
+            pw.print("  mCurUiMode=0x"); pw.print(Integer.toHexString(mCurUiMode));
+                    pw.print(" mSetUiMode=0x"); pw.println(Integer.toHexString(mSetUiMode));
+            pw.print("  mHoldingConfiguration="); pw.print(mHoldingConfiguration);
+                    pw.print(" mSystemReady="); pw.println(mSystemReady);
+            pw.print("  mTwilightService.getCurrentState()=");
+                    pw.println(mTwilightManager.getCurrentState());
         }
     }
 
-    void systemReady() {
-        synchronized (mLock) {
-            mSystemReady = true;
-            mCarModeEnabled = mDockState == Intent.EXTRA_DOCK_STATE_CAR;
-            updateComputedNightModeLocked();
-            updateLocked(0, 0);
+    @Override
+    public void onBootPhase(int phase) {
+        if (phase == SystemService.PHASE_SYSTEM_SERVICES_READY) {
+            synchronized (mLock) {
+                mSystemReady = true;
+                mCarModeEnabled = mDockState == Intent.EXTRA_DOCK_STATE_CAR;
+                updateComputedNightModeLocked();
+                updateLocked(0, 0);
+            }
         }
     }
 
-    private boolean isDoingNightModeLocked() {
+    boolean isDoingNightModeLocked() {
         return mCarModeEnabled || mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED;
     }
 
-    private void setCarModeLocked(boolean enabled) {
+    void setCarModeLocked(boolean enabled) {
         if (mCarModeEnabled != enabled) {
             mCarModeEnabled = enabled;
         }
@@ -344,7 +378,7 @@ final class UiModeManagerService extends IUiModeManager.Stub {
         }
     }
 
-    private void updateLocked(int enableFlags, int disableFlags) {
+    void updateLocked(int enableFlags, int disableFlags) {
         String action = null;
         String oldAction = null;
         if (mLastBroadcastState == Intent.EXTRA_DOCK_STATE_CAR) {
@@ -359,7 +393,7 @@ final class UiModeManagerService extends IUiModeManager.Stub {
                 adjustStatusBarCarModeLocked();
 
                 if (oldAction != null) {
-                    mContext.sendBroadcastAsUser(new Intent(oldAction), UserHandle.ALL);
+                    getContext().sendBroadcastAsUser(new Intent(oldAction), UserHandle.ALL);
                 }
                 mLastBroadcastState = Intent.EXTRA_DOCK_STATE_CAR;
                 action = UiModeManager.ACTION_ENTER_CAR_MODE;
@@ -367,7 +401,7 @@ final class UiModeManagerService extends IUiModeManager.Stub {
         } else if (isDeskDockState(mDockState)) {
             if (!isDeskDockState(mLastBroadcastState)) {
                 if (oldAction != null) {
-                    mContext.sendBroadcastAsUser(new Intent(oldAction), UserHandle.ALL);
+                    getContext().sendBroadcastAsUser(new Intent(oldAction), UserHandle.ALL);
                 }
                 mLastBroadcastState = mDockState;
                 action = UiModeManager.ACTION_ENTER_DESK_MODE;
@@ -393,7 +427,7 @@ final class UiModeManagerService extends IUiModeManager.Stub {
             Intent intent = new Intent(action);
             intent.putExtra("enableFlags", enableFlags);
             intent.putExtra("disableFlags", disableFlags);
-            mContext.sendOrderedBroadcastAsUser(intent, UserHandle.CURRENT, null,
+            getContext().sendOrderedBroadcastAsUser(intent, UserHandle.CURRENT, null,
                     mResultReceiver, null, Activity.RESULT_OK, null, null);
 
             // Attempting to make this transition a little more clean, we are going
@@ -491,7 +525,7 @@ final class UiModeManagerService extends IUiModeManager.Stub {
             // activity manager take care of both the start and config
             // change.
             Intent homeIntent = buildHomeIntent(category);
-            if (Sandman.shouldStartDockApp(mContext, homeIntent)) {
+            if (Sandman.shouldStartDockApp(getContext(), homeIntent)) {
                 try {
                     int result = ActivityManagerNative.getDefault().startActivityWithConfig(
                             null, null, homeIntent, null, null, null, 0, 0,
@@ -513,14 +547,15 @@ final class UiModeManagerService extends IUiModeManager.Stub {
 
         // If we did not start a dock app, then start dreaming if supported.
         if (category != null && !dockAppStarted) {
-            Sandman.startDreamWhenDockedIfAppropriate(mContext);
+            Sandman.startDreamWhenDockedIfAppropriate(getContext());
         }
     }
 
     private void adjustStatusBarCarModeLocked() {
+        final Context context = getContext();
         if (mStatusBarManager == null) {
             mStatusBarManager = (StatusBarManager)
-                    mContext.getSystemService(Context.STATUS_BAR_SERVICE);
+                    context.getSystemService(Context.STATUS_BAR_SERVICE);
         }
 
         // Fear not: StatusBarManagerService manages a list of requests to disable
@@ -536,12 +571,12 @@ final class UiModeManagerService extends IUiModeManager.Stub {
 
         if (mNotificationManager == null) {
             mNotificationManager = (NotificationManager)
-                    mContext.getSystemService(Context.NOTIFICATION_SERVICE);
+                    context.getSystemService(Context.NOTIFICATION_SERVICE);
         }
 
         if (mNotificationManager != null) {
             if (mCarModeEnabled) {
-                Intent carModeOffIntent = new Intent(mContext, DisableCarModeActivity.class);
+                Intent carModeOffIntent = new Intent(context, DisableCarModeActivity.class);
 
                 Notification n = new Notification();
                 n.icon = R.drawable.stat_notify_car_mode;
@@ -549,10 +584,10 @@ final class UiModeManagerService extends IUiModeManager.Stub {
                 n.flags = Notification.FLAG_ONGOING_EVENT;
                 n.when = 0;
                 n.setLatestEventInfo(
-                        mContext,
-                        mContext.getString(R.string.car_mode_disable_notification_title),
-                        mContext.getString(R.string.car_mode_disable_notification_message),
-                        PendingIntent.getActivityAsUser(mContext, 0, carModeOffIntent, 0,
+                        context,
+                        context.getString(R.string.car_mode_disable_notification_title),
+                        context.getString(R.string.car_mode_disable_notification_message),
+                        PendingIntent.getActivityAsUser(context, 0, carModeOffIntent, 0,
                                 null, UserHandle.CURRENT));
                 mNotificationManager.notifyAsUser(null,
                         R.string.car_mode_disable_notification_title, n, UserHandle.ALL);
@@ -563,7 +598,7 @@ final class UiModeManagerService extends IUiModeManager.Stub {
         }
     }
 
-    private void updateTwilight() {
+    void updateTwilight() {
         synchronized (mLock) {
             if (isDoingNightModeLocked() && mNightMode == UiModeManager.MODE_NIGHT_AUTO) {
                 updateComputedNightModeLocked();
@@ -573,36 +608,11 @@ final class UiModeManagerService extends IUiModeManager.Stub {
     }
 
     private void updateComputedNightModeLocked() {
-        TwilightState state = mTwilightService.getCurrentState();
+        TwilightState state = mTwilightManager.getCurrentState();
         if (state != null) {
             mComputedNightMode = state.isNight();
         }
     }
 
-    @Override
-    protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
-        if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
-                != PackageManager.PERMISSION_GRANTED) {
 
-            pw.println("Permission Denial: can't dump uimode service from from pid="
-                    + Binder.getCallingPid()
-                    + ", uid=" + Binder.getCallingUid());
-            return;
-        }
-
-        synchronized (mLock) {
-            pw.println("Current UI Mode Service state:");
-            pw.print("  mDockState="); pw.print(mDockState);
-                    pw.print(" mLastBroadcastState="); pw.println(mLastBroadcastState);
-            pw.print("  mNightMode="); pw.print(mNightMode);
-                    pw.print(" mCarModeEnabled="); pw.print(mCarModeEnabled);
-                    pw.print(" mComputedNightMode="); pw.println(mComputedNightMode);
-            pw.print("  mCurUiMode=0x"); pw.print(Integer.toHexString(mCurUiMode));
-                    pw.print(" mSetUiMode=0x"); pw.println(Integer.toHexString(mSetUiMode));
-            pw.print("  mHoldingConfiguration="); pw.print(mHoldingConfiguration);
-                    pw.print(" mSystemReady="); pw.println(mSystemReady);
-            pw.print("  mTwilightService.getCurrentState()=");
-                    pw.println(mTwilightService.getCurrentState());
-        }
-    }
 }