Merge "Add unattended reboot functionality to apply flags" into main

6 files changed, 552 insertions, 55 deletions

diff --git a/service/flags.aconfig b/service/flags.aconfig
index 6240af1..a9ca293 100644
--- a/service/flags.aconfig
+++ b/service/flags.aconfig
@@ -6,3 +6,9 @@ flag {
     description: "If enabled, a notification appears when flags are staged to be applied on reboot."
     bug: "296462695"
 }
+flag {
+  name: "enable_unattended_reboot"
+  namespace: "core_experiments_team_internal"
+  description: "This flag controls enabling the unattended reboot feature for applying flags."
+  bug: "297502146"
+}
diff --git a/service/java/com/android/server/deviceconfig/DeviceConfigInit.java b/service/java/com/android/server/deviceconfig/DeviceConfigInit.java
index 42cee70..6336619 100644
--- a/service/java/com/android/server/deviceconfig/DeviceConfigInit.java
+++ b/service/java/com/android/server/deviceconfig/DeviceConfigInit.java
@@ -1,84 +1,92 @@
 package com.android.server.deviceconfig;
 
-import java.io.FileDescriptor;
-import java.io.IOException;
+import static com.android.server.deviceconfig.Flags.enableRebootNotification;
+import static com.android.server.deviceconfig.Flags.enableUnattendedReboot;
 
+import java.io.IOException;
 import android.content.Intent;
 import android.annotation.NonNull;
 import android.annotation.SystemApi;
+import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.os.AsyncTask;
 import android.os.Binder;
+import android.content.IntentFilter;
 import android.provider.DeviceConfig;
-import android.provider.DeviceConfigManager;
 import android.provider.UpdatableDeviceConfigServiceReadiness;
 import android.content.ServiceConnection;
 import android.os.IBinder;
 import android.content.ComponentName;
-
-import android.provider.aidl.IDeviceConfigManager;
 import android.util.Slog;
-
 import com.android.modules.utils.build.SdkLevel;
-
 import com.android.server.SystemService;
 
-import static com.android.server.deviceconfig.Flags.enableRebootNotification;
-
 /** @hide */
 @SystemApi(client = SystemApi.Client.SYSTEM_SERVER)
 public class DeviceConfigInit {
-    private static final String TAG = "DEVICE_CONFIG_INIT";
-    private static final String STAGED_NAMESPACE = "staged";
+  private static final String TAG = "DEVICE_CONFIG_INIT";
+  private static final String STAGED_NAMESPACE = "staged";
 
-    private DeviceConfigInit() {
-        // do not instantiate
-    }
+  private DeviceConfigInit() {
+    // do not instantiate
+  }
+
+  /** @hide */
+  @SystemApi(client = SystemApi.Client.SYSTEM_SERVER)
+  public static class Lifecycle extends SystemService {
+    private DeviceConfigServiceImpl mService;
+    private UnattendedRebootManager mUnattendedRebootManager;
 
     /** @hide */
     @SystemApi(client = SystemApi.Client.SYSTEM_SERVER)
-    public static class Lifecycle extends SystemService {
-        private DeviceConfigServiceImpl mService;
-
-        /** @hide */
-        @SystemApi(client = SystemApi.Client.SYSTEM_SERVER)
-        public Lifecycle(@NonNull Context context) {
-            super(context);
-            // this service is always instantiated but should only launch subsequent service(s)
-            // if the module is ready
-            if (UpdatableDeviceConfigServiceReadiness.shouldStartUpdatableService()) {
-                mService = new DeviceConfigServiceImpl(getContext());
-                publishBinderService(DeviceConfig.SERVICE_NAME, mService);
-            }
-            applyBootstrapValues();
-        }
+    public Lifecycle(@NonNull Context context) {
+      super(context);
+      // this service is always instantiated but should only launch subsequent service(s)
+      // if the module is ready
+      if (UpdatableDeviceConfigServiceReadiness.shouldStartUpdatableService()) {
+        mService = new DeviceConfigServiceImpl(getContext());
+        publishBinderService(DeviceConfig.SERVICE_NAME, mService);
+      }
+      applyBootstrapValues();
+    }
 
-        /**
-         * @hide
-         */
-        @Override
-        public void onStart() {
-            if (enableRebootNotification()) {
-                DeviceConfig.addOnPropertiesChangedListener(
-                    STAGED_NAMESPACE,
-                    AsyncTask.THREAD_POOL_EXECUTOR,
-                    new BootNotificationCreator(getContext().getApplicationContext()));
-            }
-        }
+    /** @hide */
+    @Override
+    public void onStart() {
+      if (enableRebootNotification()) {
+        DeviceConfig.addOnPropertiesChangedListener(
+            STAGED_NAMESPACE,
+            AsyncTask.THREAD_POOL_EXECUTOR,
+            new BootNotificationCreator(getContext().getApplicationContext()));
+      }
+      if (enableUnattendedReboot()) {
+        mUnattendedRebootManager =
+            new UnattendedRebootManager(getContext().getApplicationContext());
+        getContext()
+            .registerReceiver(
+                new BroadcastReceiver() {
+                  @Override
+                  public void onReceive(Context context, Intent intent) {
+                    mUnattendedRebootManager.prepareUnattendedReboot();
+                    mUnattendedRebootManager.scheduleReboot();
+                  }
+                },
+                new IntentFilter(Intent.ACTION_BOOT_COMPLETED));
+      }
+    }
 
-        private void applyBootstrapValues() {
-            if (SdkLevel.isAtLeastV()) {
-                try {
-                    new DeviceConfigBootstrapValues().applyValuesIfNeeded();
-                } catch (RuntimeException e) {
-                    Slog.e(TAG, "Failed to load boot overrides", e);
-                    throw e;
-                } catch (IOException e) {
-                    Slog.e(TAG, "Failed to load boot overrides", e);
-                    throw new RuntimeException(e);
-                }
-            }
+    private void applyBootstrapValues() {
+      if (SdkLevel.isAtLeastV()) {
+        try {
+          new DeviceConfigBootstrapValues().applyValuesIfNeeded();
+        } catch (RuntimeException e) {
+          Slog.e(TAG, "Failed to load boot overrides", e);
+          throw e;
+        } catch (IOException e) {
+          Slog.e(TAG, "Failed to load boot overrides", e);
+          throw new RuntimeException(e);
         }
+      }
     }
-
+  }
 }
diff --git a/service/java/com/android/server/deviceconfig/UnattendedRebootManager.java b/service/java/com/android/server/deviceconfig/UnattendedRebootManager.java
new file mode 100644
index 0000000..c360f4d
--- /dev/null
+++ b/service/java/com/android/server/deviceconfig/UnattendedRebootManager.java
@@ -0,0 +1,223 @@
+package com.android.server.deviceconfig;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.app.AlarmManager;
+import android.app.KeyguardManager;
+import android.app.PendingIntent;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.IntentSender;
+import android.os.PowerManager;
+import android.os.RecoverySystem;
+import android.util.Log;
+import com.android.internal.annotations.VisibleForTesting;
+import java.io.IOException;
+import java.time.Instant;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+
+/**
+ * Reboot scheduler for applying aconfig flags.
+ *
+ * <p>If device is password protected, uses <a
+ * href="https://source.android.com/docs/core/ota/resume-on-reboot">Resume on Reboot</a> to reboot
+ * the device, otherwise proceeds with regular reboot.
+ *
+ * @hide
+ */
+final class UnattendedRebootManager {
+  private static final int DEFAULT_REBOOT_WINDOW_START_TIME_HOUR = 2;
+
+  private static final int DEFAULT_REBOOT_FREQUENCY_DAYS = 2;
+
+  private static final String TAG = "UnattendedRebootManager";
+
+  static final String REBOOT_REASON = "deviceconfig";
+
+  @VisibleForTesting
+  static final String ACTION_RESUME_ON_REBOOT_LSKF_CAPTURED =
+      "com.android.server.deviceconfig.RESUME_ON_REBOOOT_LSKF_CAPTURED";
+
+  @VisibleForTesting
+  static final String ACTION_TRIGGER_REBOOT = "com.android.server.deviceconfig.TRIGGER_REBOOT";
+
+  private final Context mContext;
+
+  private boolean mLskfCaptured;
+
+  private final UnattendedRebootManagerInjector mInjector;
+
+  private static class InjectorImpl implements UnattendedRebootManagerInjector {
+    InjectorImpl() {
+      /*no op*/
+    }
+
+    public long now() {
+      return System.currentTimeMillis();
+    }
+
+    public ZoneId zoneId() {
+      return ZoneId.systemDefault();
+    }
+
+    public int getRebootStartTime() {
+      return DEFAULT_REBOOT_WINDOW_START_TIME_HOUR;
+    }
+
+    public int getRebootFrequency() {
+      return DEFAULT_REBOOT_FREQUENCY_DAYS;
+    }
+
+    public void setRebootAlarm(Context context, long rebootTimeMillis) {
+      AlarmManager alarmManager = context.getSystemService(AlarmManager.class);
+      PendingIntent pendingIntent =
+          PendingIntent.getBroadcast(
+              context,
+              /* requestCode= */ 0,
+              new Intent(ACTION_TRIGGER_REBOOT),
+              PendingIntent.FLAG_ONE_SHOT | PendingIntent.FLAG_IMMUTABLE);
+
+      alarmManager.setExact(AlarmManager.RTC_WAKEUP, rebootTimeMillis, pendingIntent);
+    }
+
+    public int rebootAndApply(@NonNull Context context, @NonNull String reason, boolean slotSwitch)
+        throws IOException {
+      return RecoverySystem.rebootAndApply(context, reason, slotSwitch);
+    }
+
+    public void prepareForUnattendedUpdate(
+        @NonNull Context context, @NonNull String updateToken, @Nullable IntentSender intentSender)
+        throws IOException {
+      RecoverySystem.prepareForUnattendedUpdate(context, updateToken, intentSender);
+    }
+
+    public boolean isPreparedForUnattendedUpdate(@NonNull Context context) throws IOException {
+      return RecoverySystem.isPreparedForUnattendedUpdate(context);
+    }
+
+    public void regularReboot(Context context) {
+      PowerManager powerManager = context.getSystemService(PowerManager.class);
+      powerManager.reboot(REBOOT_REASON);
+    }
+  }
+
+  @VisibleForTesting
+  UnattendedRebootManager(Context context, UnattendedRebootManagerInjector injector) {
+    mContext = context;
+    mInjector = injector;
+
+    mContext.registerReceiver(
+        new BroadcastReceiver() {
+          @Override
+          public void onReceive(Context context, Intent intent) {
+            mLskfCaptured = true;
+          }
+        },
+        new IntentFilter(ACTION_RESUME_ON_REBOOT_LSKF_CAPTURED),
+        Context.RECEIVER_EXPORTED);
+
+    // Do not export receiver so that tests don't trigger reboot.
+    mContext.registerReceiver(
+        new BroadcastReceiver() {
+          @Override
+          public void onReceive(Context context, Intent intent) {
+            tryRebootOrSchedule();
+          }
+        },
+        new IntentFilter(ACTION_TRIGGER_REBOOT),
+        Context.RECEIVER_NOT_EXPORTED);
+  }
+
+  UnattendedRebootManager(Context context) {
+    this(context, new InjectorImpl());
+  }
+
+  public void prepareUnattendedReboot() {
+    Log.i(TAG, "Preparing for Unattended Reboot");
+    // RoR only supported on devices with screen lock.
+    if (!isDeviceSecure(mContext)) {
+      return;
+    }
+    PendingIntent pendingIntent =
+        PendingIntent.getBroadcast(
+            mContext,
+            /* requestCode= */ 0,
+            new Intent(ACTION_RESUME_ON_REBOOT_LSKF_CAPTURED),
+            PendingIntent.FLAG_ONE_SHOT | PendingIntent.FLAG_IMMUTABLE);
+
+    try {
+      mInjector.prepareForUnattendedUpdate(
+          mContext, /* updateToken= */ "", pendingIntent.getIntentSender());
+    } catch (IOException e) {
+      Log.i(TAG, "prepareForUnattendedReboot failed with exception" + e.getLocalizedMessage());
+    }
+  }
+
+  public void scheduleReboot() {
+    // Reboot the next day at the reboot start time.
+    LocalDateTime timeToReboot =
+        Instant.ofEpochMilli(mInjector.now())
+            .atZone(mInjector.zoneId())
+            .toLocalDate()
+            .plusDays(mInjector.getRebootFrequency())
+            .atTime(mInjector.getRebootStartTime(), /* minute= */ 0);
+    long rebootTimeMillis = timeToReboot.atZone(mInjector.zoneId()).toInstant().toEpochMilli();
+    Log.v(TAG, "Scheduling unattended reboot at time " + timeToReboot);
+
+    if (timeToReboot.isBefore(
+        LocalDateTime.ofInstant(Instant.ofEpochMilli(mInjector.now()), mInjector.zoneId()))) {
+      Log.w(TAG, "Reboot time has already passed.");
+      return;
+    }
+
+    mInjector.setRebootAlarm(mContext, rebootTimeMillis);
+  }
+
+  @VisibleForTesting
+  void tryRebootOrSchedule() {
+    // TODO(b/305259443): check network is connected
+    // Check if RoR is supported.
+    if (!isDeviceSecure(mContext)) {
+      Log.v(TAG, "Device is not secure. Proceed with regular reboot");
+      mInjector.regularReboot(mContext);
+    } else if (isPreparedForUnattendedReboot()) {
+      try {
+        mInjector.rebootAndApply(mContext, REBOOT_REASON, /* slotSwitch= */ false);
+      } catch (IOException e) {
+        Log.e(TAG, e.getLocalizedMessage());
+      }
+      // If reboot is successful, should not reach this.
+    } else {
+      // Lskf is not captured, try again the following day
+      prepareUnattendedReboot();
+      scheduleReboot();
+    }
+  }
+
+  private boolean isPreparedForUnattendedReboot() {
+    try {
+      boolean isPrepared = mInjector.isPreparedForUnattendedUpdate(mContext);
+      if (isPrepared != mLskfCaptured) {
+        Log.w(TAG, "isPrepared != mLskfCaptured. Received " + isPrepared);
+      }
+      return isPrepared;
+    } catch (IOException e) {
+      Log.w(TAG, e.getLocalizedMessage());
+      return mLskfCaptured;
+    }
+  }
+
+  /** Returns true if the device has screen lock. */
+  private static boolean isDeviceSecure(Context context) {
+    KeyguardManager keyguardManager = context.getSystemService(KeyguardManager.class);
+    if (keyguardManager == null) {
+      // Unknown if device is locked, proceed with RoR anyway.
+      Log.w(TAG, "Keyguard manager is null, proceeding with RoR anyway.");
+      return true;
+    }
+    return keyguardManager.isDeviceSecure();
+  }
+}
diff --git a/service/java/com/android/server/deviceconfig/UnattendedRebootManagerInjector.java b/service/java/com/android/server/deviceconfig/UnattendedRebootManagerInjector.java
new file mode 100644
index 0000000..4e883d3
--- /dev/null
+++ b/service/java/com/android/server/deviceconfig/UnattendedRebootManagerInjector.java
@@ -0,0 +1,43 @@
+package com.android.server.deviceconfig;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.content.IntentSender;
+import android.os.RecoverySystem;
+
+import java.io.IOException;
+import java.time.ZoneId;
+
+/**
+ * Dependency injectors for {@link com.android.server.deviceconfig.UnattendedRebootManager} to
+ * enable unit testing.
+ */
+interface UnattendedRebootManagerInjector {
+
+  /** Time injectors. */
+  long now();
+
+  ZoneId zoneId();
+
+  /** Reboot time injectors. */
+  int getRebootStartTime();
+
+  int getRebootFrequency();
+
+  /** Reboot Alarm injector. */
+  void setRebootAlarm(Context context, long rebootTimeMillis);
+
+  /** {@link RecoverySystem} methods injectors. */
+  int rebootAndApply(@NonNull Context context, @NonNull String reason, boolean slotSwitch)
+      throws IOException;
+
+  void prepareForUnattendedUpdate(
+      @NonNull Context context, @NonNull String updateToken, @Nullable IntentSender intentSender)
+      throws IOException;
+
+  boolean isPreparedForUnattendedUpdate(@NonNull Context context) throws IOException;
+
+  /** Regular reboot injector. */
+  void regularReboot(Context context);
+}
diff --git a/service/javatests/Android.bp b/service/javatests/Android.bp
index 047d146..eb1561c 100644
--- a/service/javatests/Android.bp
+++ b/service/javatests/Android.bp
@@ -36,11 +36,14 @@ android_test {
         "general-tests",
     ],
     static_libs: [
+        "androidx.test.rules",
         "androidx.test.runner",
+        "androidx.annotation_annotation",
         "modules-utils-build",
         "service-configinfrastructure.impl",
-        "truth",
+        "frameworks-base-testutils",
         "mockito-target-minus-junit4",
+        "truth",
     ],
     libs: [
         "android.test.base",
diff --git a/service/javatests/src/com/android/server/deviceconfig/UnattendedRebootManagerTest.java b/service/javatests/src/com/android/server/deviceconfig/UnattendedRebootManagerTest.java
new file mode 100644
index 0000000..f87cf56
--- /dev/null
+++ b/service/javatests/src/com/android/server/deviceconfig/UnattendedRebootManagerTest.java
@@ -0,0 +1,214 @@
+package com.android.server.deviceconfig;
+
+import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
+import static com.android.server.deviceconfig.UnattendedRebootManager.ACTION_RESUME_ON_REBOOT_LSKF_CAPTURED;
+import static com.android.server.deviceconfig.UnattendedRebootManager.ACTION_TRIGGER_REBOOT;
+import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import android.app.KeyguardManager;
+import android.content.BroadcastReceiver;
+import android.content.ContextWrapper;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.IntentSender;
+import android.util.Log;
+
+import androidx.test.filters.SmallTest;
+import java.io.IOException;
+import java.time.ZoneId;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import org.junit.Before;
+import org.junit.Test;
+
+@SmallTest
+public class UnattendedRebootManagerTest {
+
+  private static final int REBOOT_FREQUENCY = 1;
+  private static final int REBOOT_HOUR = 2;
+  private static final long CURRENT_TIME = 1696452549304L; // 2023-10-04T13:49:09.304
+  private static final long REBOOT_TIME = 1696496400000L; // 2023-10-05T02:00:00
+
+  private Context mContext;
+
+  private KeyguardManager mKeyguardManager;
+
+  FakeInjector mFakeInjector;
+
+  private UnattendedRebootManager mRebootManager;
+
+  @Before
+  public void setUp() throws Exception {
+    mKeyguardManager = mock(KeyguardManager.class);
+
+    mContext =
+        new ContextWrapper(getInstrumentation().getTargetContext()) {
+          @Override
+          public Object getSystemService(String name) {
+            if (name.equals(Context.KEYGUARD_SERVICE)) {
+              return mKeyguardManager;
+            }
+            return super.getSystemService(name);
+          }
+        };
+
+    mFakeInjector = new FakeInjector();
+    mRebootManager = new UnattendedRebootManager(mContext, mFakeInjector);
+
+    // Need to register receiver in tests so that the test doesn't trigger reboot requested by
+    // deviceconfig.
+    mContext.registerReceiver(
+        new BroadcastReceiver() {
+          @Override
+          public void onReceive(Context context, Intent intent) {
+            mRebootManager.tryRebootOrSchedule();
+          }
+        },
+        new IntentFilter(ACTION_TRIGGER_REBOOT),
+        Context.RECEIVER_EXPORTED);
+  }
+
+  @Test
+  public void scheduleReboot() {
+    when(mKeyguardManager.isDeviceSecure()).thenReturn(true);
+
+    mRebootManager.prepareUnattendedReboot();
+    mRebootManager.scheduleReboot();
+
+    assertThat(mFakeInjector.getActualRebootTime()).isEqualTo(REBOOT_TIME);
+    assertTrue(mFakeInjector.isRebootAndApplied());
+    assertFalse(mFakeInjector.isRegularRebooted());
+  }
+
+  @Test
+  public void scheduleReboot_noPinLock() {
+    when(mKeyguardManager.isDeviceSecure()).thenReturn(false);
+
+    mRebootManager.prepareUnattendedReboot();
+    mRebootManager.scheduleReboot();
+
+    assertThat(mFakeInjector.getActualRebootTime()).isEqualTo(REBOOT_TIME);
+    assertFalse(mFakeInjector.isRebootAndApplied());
+    assertTrue(mFakeInjector.isRegularRebooted());
+  }
+
+  @Test
+  public void scheduleReboot_noPreparation() {
+    when(mKeyguardManager.isDeviceSecure()).thenReturn(true);
+
+    mRebootManager.scheduleReboot();
+
+    assertThat(mFakeInjector.getActualRebootTime()).isEqualTo(REBOOT_TIME);
+    assertFalse(mFakeInjector.isRebootAndApplied());
+    assertFalse(mFakeInjector.isRegularRebooted());
+  }
+
+  static class FakeInjector implements UnattendedRebootManagerInjector {
+
+    private boolean isPreparedForUnattendedReboot;
+    private boolean rebootAndApplied;
+    private boolean regularRebooted;
+    private long actualRebootTime;
+
+    FakeInjector() {}
+
+    @Override
+    public void prepareForUnattendedUpdate(
+        @NonNull Context context, @NonNull String updateToken, @Nullable IntentSender intentSender)
+        throws IOException {
+      context.sendBroadcast(new Intent(ACTION_RESUME_ON_REBOOT_LSKF_CAPTURED));
+      isPreparedForUnattendedReboot = true;
+    }
+
+    @Override
+    public boolean isPreparedForUnattendedUpdate(@NonNull Context context) throws IOException {
+      return isPreparedForUnattendedReboot;
+    }
+
+    @Override
+    public int rebootAndApply(
+        @NonNull Context context, @NonNull String reason, boolean slotSwitch) {
+      Log.i("UnattendedRebootManagerTest", "MockInjector.rebootAndApply");
+      rebootAndApplied = true;
+      return 0; // No error.
+    }
+
+    @Override
+    public int getRebootFrequency() {
+      return REBOOT_FREQUENCY;
+    }
+
+    @Override
+    public void setRebootAlarm(Context context, long rebootTimeMillis) {
+      // reboot immediately
+      actualRebootTime = rebootTimeMillis;
+      context.sendBroadcast(new Intent(UnattendedRebootManager.ACTION_TRIGGER_REBOOT));
+
+      LatchingBroadcastReceiver rebootReceiver = new LatchingBroadcastReceiver();
+      context.registerReceiver(
+          rebootReceiver, new IntentFilter(ACTION_TRIGGER_REBOOT), Context.RECEIVER_EXPORTED);
+      rebootReceiver.await(10, TimeUnit.SECONDS);
+    }
+
+    @Override
+    public int getRebootStartTime() {
+      return REBOOT_HOUR;
+    }
+
+    @Override
+    public long now() {
+      return CURRENT_TIME;
+    }
+
+    @Override
+    public ZoneId zoneId() {
+      return ZoneId.of("America/Los_Angeles");
+    }
+
+    @Override
+    public void regularReboot(Context context) {
+      Log.i("UnattendedRebootManagerTest", "MockInjector.regularRebooted");
+      regularRebooted = true;
+    }
+
+    boolean isRebootAndApplied() {
+      return rebootAndApplied;
+    }
+
+    boolean isRegularRebooted() {
+      return regularRebooted;
+    }
+
+    public long getActualRebootTime() {
+      return actualRebootTime;
+    }
+  }
+
+  /**
+   * A {@link BroadcastReceiver} with an internal latch that unblocks once any intent is received.
+   */
+  private static class LatchingBroadcastReceiver extends BroadcastReceiver {
+    private CountDownLatch latch = new CountDownLatch(1);
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+      latch.countDown();
+    }
+
+    public boolean await(long timeoutInMs, TimeUnit timeUnit) {
+      try {
+        return latch.await(timeoutInMs, timeUnit);
+      } catch (InterruptedException e) {
+        return false;
+      }
+    }
+  }
+}