| /* |
| * Copyright (C) 2021 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.qc.controller; |
| |
| import static com.android.car.qc.provider.BaseQCProvider.EXTRA_ITEM; |
| import static com.android.car.qc.provider.BaseQCProvider.EXTRA_URI; |
| import static com.android.car.qc.provider.BaseQCProvider.METHOD_BIND; |
| import static com.android.car.qc.provider.BaseQCProvider.METHOD_DESTROY; |
| import static com.android.car.qc.provider.BaseQCProvider.METHOD_SUBSCRIBE; |
| import static com.android.car.qc.provider.BaseQCProvider.METHOD_UNSUBSCRIBE; |
| |
| import android.content.ContentProviderClient; |
| import android.content.Context; |
| import android.database.ContentObserver; |
| import android.net.Uri; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.HandlerExecutor; |
| import android.os.HandlerThread; |
| import android.os.Looper; |
| import android.os.Parcelable; |
| import android.os.RemoteException; |
| import android.util.ArrayMap; |
| import android.util.Log; |
| import android.util.Pair; |
| |
| import androidx.annotation.NonNull; |
| import androidx.annotation.VisibleForTesting; |
| import androidx.annotation.WorkerThread; |
| |
| import com.android.car.qc.QCItem; |
| |
| import java.util.concurrent.Executor; |
| |
| /** |
| * Controller for binding to remote quick control providers. |
| */ |
| public class RemoteQCController extends BaseQCController { |
| private static final String TAG = "RemoteQCController"; |
| private static final long PROVIDER_ANR_TIMEOUT = 3000L; |
| |
| private final Uri mUri; |
| private final Executor mBackgroundExecutor; |
| private final HandlerThread mBackgroundHandlerThread; |
| private final ArrayMap<Pair<Uri, QCItemCallback>, QCObserver> mObserverLookup = |
| new ArrayMap<>(); |
| |
| public RemoteQCController(Context context, Uri uri) { |
| super(context); |
| mUri = uri; |
| mBackgroundHandlerThread = new HandlerThread(/* name= */ TAG + "HandlerThread"); |
| mBackgroundHandlerThread.start(); |
| mBackgroundExecutor = new HandlerExecutor( |
| new Handler(mBackgroundHandlerThread.getLooper())); |
| } |
| |
| @VisibleForTesting |
| RemoteQCController(Context context, Uri uri, Executor backgroundExecutor) { |
| super(context); |
| mUri = uri; |
| mBackgroundHandlerThread = null; |
| mBackgroundExecutor = backgroundExecutor; |
| } |
| |
| @Override |
| protected void updateListening() { |
| boolean listen = mShouldListen && !mObservers.isEmpty(); |
| mBackgroundExecutor.execute(() -> updateListeningBg(listen)); |
| } |
| |
| @Override |
| public void destroy() { |
| super.destroy(); |
| if (mBackgroundHandlerThread != null) { |
| mBackgroundHandlerThread.quit(); |
| } |
| try (ContentProviderClient client = getClient()) { |
| if (client == null) { |
| return; |
| } |
| Bundle b = new Bundle(); |
| b.putParcelable(EXTRA_URI, mUri); |
| try { |
| client.call(METHOD_DESTROY, /* arg= */ null, b); |
| } catch (Exception e) { |
| Log.d(TAG, "Error destroying QCItem", e); |
| } |
| } |
| } |
| |
| @WorkerThread |
| private void updateListeningBg(boolean isListening) { |
| if (mWasListening != isListening) { |
| mWasListening = isListening; |
| if (isListening) { |
| registerQCCallback(mContext.getMainExecutor(), /* callback= */ this); |
| // Update one-time on a different thread so that it can display in parallel |
| mBackgroundExecutor.execute(this::updateQCItem); |
| } else { |
| unregisterQCCallback(this); |
| } |
| } |
| } |
| |
| @WorkerThread |
| private void updateQCItem() { |
| try { |
| QCItem item = bind(); |
| mContext.getMainExecutor().execute(() -> onQCItemUpdated(item)); |
| } catch (Exception e) { |
| Log.d(TAG, "Error fetching QCItem", e); |
| } |
| } |
| |
| private QCItem bind() { |
| try (ContentProviderClient provider = getClient()) { |
| if (provider == null) { |
| return null; |
| } |
| Bundle extras = new Bundle(); |
| extras.putParcelable(EXTRA_URI, mUri); |
| Bundle res = provider.call(METHOD_BIND, /* arg= */ null, extras); |
| if (res == null) { |
| return null; |
| } |
| res.setDefusable(true); |
| res.setClassLoader(QCItem.class.getClassLoader()); |
| Parcelable parcelable = res.getParcelable(EXTRA_ITEM); |
| if (parcelable instanceof QCItem) { |
| return (QCItem) parcelable; |
| } |
| return null; |
| } catch (RemoteException e) { |
| Log.d(TAG, "Error binding QCItem", e); |
| return null; |
| } |
| } |
| |
| private void subscribe() { |
| try (ContentProviderClient client = getClient()) { |
| if (client == null) { |
| return; |
| } |
| Bundle b = new Bundle(); |
| b.putParcelable(EXTRA_URI, mUri); |
| try { |
| client.call(METHOD_SUBSCRIBE, /* arg= */ null, b); |
| } catch (Exception e) { |
| Log.d(TAG, "Error subscribing to QCItem", e); |
| } |
| } |
| } |
| |
| private void unsubscribe() { |
| try (ContentProviderClient client = getClient()) { |
| if (client == null) { |
| return; |
| } |
| Bundle b = new Bundle(); |
| b.putParcelable(EXTRA_URI, mUri); |
| try { |
| client.call(METHOD_UNSUBSCRIBE, /* arg= */ null, b); |
| } catch (Exception e) { |
| Log.d(TAG, "Error unsubscribing from QCItem", e); |
| } |
| } |
| } |
| |
| @VisibleForTesting |
| ContentProviderClient getClient() { |
| ContentProviderClient client = mContext.getContentResolver() |
| .acquireContentProviderClient(mUri); |
| if (client == null) { |
| return null; |
| } |
| client.setDetectNotResponding(PROVIDER_ANR_TIMEOUT); |
| return client; |
| } |
| |
| private void registerQCCallback(@NonNull Executor executor, @NonNull QCItemCallback callback) { |
| getObserver(callback, new QCObserver(mUri, executor, callback)).startObserving(); |
| } |
| |
| private void unregisterQCCallback(@NonNull QCItemCallback callback) { |
| synchronized (mObserverLookup) { |
| QCObserver observer = mObserverLookup.remove(new Pair<>(mUri, callback)); |
| if (observer != null) { |
| observer.stopObserving(); |
| } |
| } |
| } |
| |
| private QCObserver getObserver(QCItemCallback callback, QCObserver observer) { |
| Pair<Uri, QCItemCallback> key = new Pair<>(mUri, callback); |
| synchronized (mObserverLookup) { |
| QCObserver oldObserver = mObserverLookup.put(key, observer); |
| if (oldObserver != null) { |
| oldObserver.stopObserving(); |
| } |
| } |
| return observer; |
| } |
| |
| private class QCObserver { |
| private final Uri mUri; |
| private final Executor mExecutor; |
| private final QCItemCallback mCallback; |
| private boolean mIsSubscribed; |
| |
| private final Runnable mUpdateItem = new Runnable() { |
| @Override |
| public void run() { |
| trySubscribe(); |
| QCItem item = bind(); |
| mExecutor.execute(() -> mCallback.onQCItemUpdated(item)); |
| } |
| }; |
| |
| private final ContentObserver mObserver = new ContentObserver( |
| new Handler(Looper.getMainLooper())) { |
| @Override |
| public void onChange(boolean selfChange) { |
| android.os.AsyncTask.execute(mUpdateItem); |
| } |
| }; |
| |
| QCObserver(Uri uri, Executor executor, QCItemCallback callback) { |
| mUri = uri; |
| mExecutor = executor; |
| mCallback = callback; |
| } |
| |
| void startObserving() { |
| ContentProviderClient provider = |
| mContext.getContentResolver().acquireContentProviderClient(mUri); |
| if (provider != null) { |
| provider.close(); |
| mContext.getContentResolver().registerContentObserver( |
| mUri, /* notifyForDescendants= */ true, mObserver); |
| trySubscribe(); |
| } |
| } |
| |
| void trySubscribe() { |
| if (!mIsSubscribed) { |
| subscribe(); |
| mIsSubscribed = true; |
| } |
| } |
| |
| void stopObserving() { |
| mContext.getContentResolver().unregisterContentObserver(mObserver); |
| if (mIsSubscribed) { |
| unsubscribe(); |
| mIsSubscribed = false; |
| } |
| } |
| } |
| } |