| /* |
| * Copyright (C) 2016 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.car; |
| |
| import android.os.Handler; |
| import android.os.Message; |
| import android.util.Log; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.annotations.VisibleForTesting; |
| |
| import java.lang.ref.WeakReference; |
| |
| /** |
| * An wrapper class that can be backed by a real DeviceIdleController or a mocked one. |
| */ |
| public abstract class DeviceIdleControllerWrapper { |
| private static final String TAG = "Garage_DeviceIdleWrapper"; |
| |
| private static final int MSG_REPORT_ACTIVE = 1; |
| |
| @VisibleForTesting |
| protected WeakReference<DeviceMaintenanceActivityListener> mListener; |
| |
| public interface DeviceMaintenanceActivityListener { |
| public void onMaintenanceActivityChanged(boolean active); |
| } |
| private final Object mLock = new Object(); |
| @GuardedBy("mLock") |
| private boolean mActive; |
| |
| private Handler mHandler = new IdleControllerHandler(); |
| |
| private class IdleControllerHandler extends Handler { |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case MSG_REPORT_ACTIVE: |
| boolean active = msg.arg1 == 1; |
| if (mListener.get() != null) { |
| mListener.get().onMaintenanceActivityChanged(active); |
| } |
| break; |
| } |
| } |
| } |
| |
| public boolean startTracking(DeviceMaintenanceActivityListener listener) { |
| synchronized (mLock) { |
| mListener = new WeakReference<DeviceMaintenanceActivityListener>(listener); |
| mActive = startLocked(); |
| return mActive; |
| } |
| } |
| |
| protected abstract boolean startLocked(); |
| |
| public abstract void stopTracking(); |
| |
| @VisibleForTesting |
| protected void reportActiveLocked(final boolean active) { |
| // post to a handler instead of calling the callback directly to avoid potential deadlock. |
| mHandler.sendMessage(mHandler.obtainMessage(MSG_REPORT_ACTIVE, active ? 1 : 0, 0)); |
| } |
| |
| @VisibleForTesting |
| protected void setMaintenanceActivity(final boolean active) { |
| synchronized (mLock) { |
| if (mActive == active) { |
| return; |
| } |
| mActive = active; |
| |
| if (mListener.get() == null) { |
| // do cleanup if the listener has gone and did not call release. |
| stopTracking(); |
| return; |
| } |
| reportActiveLocked(active); |
| } |
| } |
| } |