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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.managedprovisioning.task;
     18 
     19 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.PROVISIONING_START_PROFILE_TASK_MS;
     20 import static com.android.internal.util.Preconditions.checkNotNull;
     21 
     22 import android.app.ActivityManager;
     23 import android.app.IActivityManager;
     24 import android.content.BroadcastReceiver;
     25 import android.content.Context;
     26 import android.content.Intent;
     27 import android.content.IntentFilter;
     28 import android.os.RemoteException;
     29 import android.os.UserHandle;
     30 
     31 import com.android.internal.annotations.VisibleForTesting;
     32 import com.android.managedprovisioning.common.ProvisionLogger;
     33 import com.android.managedprovisioning.R;
     34 import com.android.managedprovisioning.model.ProvisioningParams;
     35 
     36 import java.util.concurrent.Semaphore;
     37 import java.util.concurrent.TimeUnit;
     38 
     39 /**
     40  * This task starts the managed profile and waits for it to be unlocked.
     41  */
     42 public class StartManagedProfileTask extends AbstractProvisioningTask {
     43     // Maximum time we will wait for ACTION_USER_UNLOCK until we give up
     44     private static final int USER_UNLOCKED_TIMEOUT_SECONDS = 120; // 2 minutes
     45     @VisibleForTesting
     46     static final IntentFilter UNLOCK_FILTER = new IntentFilter(Intent.ACTION_USER_UNLOCKED);
     47 
     48     private final IActivityManager mIActivityManager;
     49 
     50     public StartManagedProfileTask(Context context, ProvisioningParams params, Callback callback) {
     51         this(ActivityManager.getService(), context, params, callback);
     52     }
     53 
     54     @VisibleForTesting
     55     StartManagedProfileTask(
     56             IActivityManager iActivityManager,
     57             Context context,
     58             ProvisioningParams params,
     59             Callback callback) {
     60         super(context, params, callback);
     61 
     62         mIActivityManager = checkNotNull(iActivityManager);
     63     }
     64 
     65     @Override
     66     public void run(int userId) {
     67         startTaskTimer();
     68         UserUnlockedReceiver unlockedReceiver = new UserUnlockedReceiver(userId);
     69         mContext.registerReceiverAsUser(unlockedReceiver, new UserHandle(userId), UNLOCK_FILTER,
     70                 null, null);
     71         try {
     72             if (!mIActivityManager.startUserInBackground(userId)) {
     73                 ProvisionLogger.loge("Unable to start user in background: " + userId);
     74                 error(0);
     75                 return;
     76             }
     77 
     78             if (!unlockedReceiver.waitForUserUnlocked()) {
     79                 ProvisionLogger.loge("Timeout whilst waiting for unlock of user: " + userId);
     80                 error(0);
     81                 return;
     82             }
     83         } catch (RemoteException e) {
     84             ProvisionLogger.loge("Exception when starting user in background: " + userId, e);
     85             error(0);
     86             return;
     87         } finally {
     88             mContext.unregisterReceiver(unlockedReceiver);
     89         }
     90         stopTaskTimer();
     91         success();
     92     }
     93 
     94     @Override
     95     public int getStatusMsgId() {
     96         return R.string.progress_finishing_touches;
     97     }
     98 
     99     @Override
    100     protected int getMetricsCategory() {
    101         return PROVISIONING_START_PROFILE_TASK_MS;
    102     }
    103 
    104     /**
    105      * BroadcastReceiver that listens to {@link Intent#ACTION_USER_UNLOCKED} in order to provide
    106      * a blocking wait until the managed profile has been started and unlocked.
    107      */
    108     @VisibleForTesting
    109     static class UserUnlockedReceiver extends BroadcastReceiver {
    110         private final Semaphore semaphore = new Semaphore(0);
    111         private final int mUserId;
    112 
    113         UserUnlockedReceiver(int userId) {
    114             mUserId = userId;
    115         }
    116 
    117         @Override
    118         public void onReceive(Context context, Intent intent ) {
    119             if (!Intent.ACTION_USER_UNLOCKED.equals(intent.getAction())) {
    120                 ProvisionLogger.logw("Unexpected intent: " + intent);
    121                 return;
    122             }
    123             if (intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL) == mUserId) {
    124                 ProvisionLogger.logd("Received ACTION_USER_UNLOCKED for user " + mUserId);
    125                 semaphore.release();
    126             }
    127         }
    128 
    129         public boolean waitForUserUnlocked() {
    130             ProvisionLogger.logd("Waiting for ACTION_USER_UNLOCKED");
    131             try {
    132                 return semaphore.tryAcquire(USER_UNLOCKED_TIMEOUT_SECONDS, TimeUnit.SECONDS);
    133             } catch (InterruptedException ie) {
    134                 return false;
    135             }
    136         }
    137     }
    138 }
    139