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/*
* Copyright (C) 2015 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.tv.dvr.provider;
import android.content.Context;
import android.database.Cursor;
import android.os.AsyncTask;
import android.support.annotation.Nullable;
import com.android.tv.common.concurrent.NamedThreadFactory;
import com.android.tv.dvr.data.ScheduledRecording;
import com.android.tv.dvr.data.SeriesRecording;
import com.android.tv.dvr.provider.DvrContract.Schedules;
import com.android.tv.dvr.provider.DvrContract.SeriesRecordings;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
/** {@link AsyncTask} that defaults to executing on its own single threaded Executor Service. */
public abstract class AsyncDvrDbTask<Params, Progress, Result>
extends AsyncTask<Params, Progress, Result> {
private static final NamedThreadFactory THREAD_FACTORY =
new NamedThreadFactory(AsyncDvrDbTask.class.getSimpleName());
private static final ExecutorService DB_EXECUTOR =
Executors.newSingleThreadExecutor(THREAD_FACTORY);
private static DvrDatabaseHelper sDbHelper;
private static synchronized DvrDatabaseHelper initializeDbHelper(Context context) {
if (sDbHelper == null) {
sDbHelper = new DvrDatabaseHelper(context.getApplicationContext());
}
return sDbHelper;
}
final Context mContext;
private AsyncDvrDbTask(Context context) {
mContext = context;
}
/** Execute the task on the {@link #DB_EXECUTOR} thread. */
@SafeVarargs
public final void executeOnDbThread(Params... params) {
executeOnExecutor(DB_EXECUTOR, params);
}
@Override
protected final Result doInBackground(Params... params) {
initializeDbHelper(mContext);
return doInDvrBackground(params);
}
/** Executes in the background after {@link #initializeDbHelper(Context)} */
@Nullable
protected abstract Result doInDvrBackground(Params... params);
/** Inserts schedules. */
public static class AsyncAddScheduleTask
extends AsyncDvrDbTask<ScheduledRecording, Void, Void> {
public AsyncAddScheduleTask(Context context) {
super(context);
}
@Override
protected final Void doInDvrBackground(ScheduledRecording... params) {
sDbHelper.insertSchedules(params);
return null;
}
}
/** Update schedules. */
public static class AsyncUpdateScheduleTask
extends AsyncDvrDbTask<ScheduledRecording, Void, Void> {
public AsyncUpdateScheduleTask(Context context) {
super(context);
}
@Override
protected final Void doInDvrBackground(ScheduledRecording... params) {
sDbHelper.updateSchedules(params);
return null;
}
}
/** Delete schedules. */
public static class AsyncDeleteScheduleTask
extends AsyncDvrDbTask<ScheduledRecording, Void, Void> {
public AsyncDeleteScheduleTask(Context context) {
super(context);
}
@Override
protected final Void doInDvrBackground(ScheduledRecording... params) {
sDbHelper.deleteSchedules(params);
return null;
}
}
/** Returns all {@link ScheduledRecording}s. */
public abstract static class AsyncDvrQueryScheduleTask
extends AsyncDvrDbTask<Void, Void, List<ScheduledRecording>> {
public AsyncDvrQueryScheduleTask(Context context) {
super(context);
}
@Override
@Nullable
protected final List<ScheduledRecording> doInDvrBackground(Void... params) {
if (isCancelled()) {
return null;
}
List<ScheduledRecording> scheduledRecordings = new ArrayList<>();
try (Cursor c = sDbHelper.query(Schedules.TABLE_NAME, ScheduledRecording.PROJECTION)) {
while (c.moveToNext() && !isCancelled()) {
scheduledRecordings.add(ScheduledRecording.fromCursor(c));
}
}
return scheduledRecordings;
}
}
/** Inserts series recordings. */
public static class AsyncAddSeriesRecordingTask
extends AsyncDvrDbTask<SeriesRecording, Void, Void> {
public AsyncAddSeriesRecordingTask(Context context) {
super(context);
}
@Override
protected final Void doInDvrBackground(SeriesRecording... params) {
sDbHelper.insertSeriesRecordings(params);
return null;
}
}
/** Update series recordings. */
public static class AsyncUpdateSeriesRecordingTask
extends AsyncDvrDbTask<SeriesRecording, Void, Void> {
public AsyncUpdateSeriesRecordingTask(Context context) {
super(context);
}
@Override
protected final Void doInDvrBackground(SeriesRecording... params) {
sDbHelper.updateSeriesRecordings(params);
return null;
}
}
/** Delete series recordings. */
public static class AsyncDeleteSeriesRecordingTask
extends AsyncDvrDbTask<SeriesRecording, Void, Void> {
public AsyncDeleteSeriesRecordingTask(Context context) {
super(context);
}
@Override
protected final Void doInDvrBackground(SeriesRecording... params) {
sDbHelper.deleteSeriesRecordings(params);
return null;
}
}
/** Returns all {@link SeriesRecording}s. */
public abstract static class AsyncDvrQuerySeriesRecordingTask
extends AsyncDvrDbTask<Void, Void, List<SeriesRecording>> {
public AsyncDvrQuerySeriesRecordingTask(Context context) {
super(context);
}
@Override
@Nullable
protected final List<SeriesRecording> doInDvrBackground(Void... params) {
if (isCancelled()) {
return null;
}
List<SeriesRecording> scheduledRecordings = new ArrayList<>();
try (Cursor c =
sDbHelper.query(SeriesRecordings.TABLE_NAME, SeriesRecording.PROJECTION)) {
while (c.moveToNext() && !isCancelled()) {
scheduledRecordings.add(SeriesRecording.fromCursor(c));
}
}
return scheduledRecordings;
}
}
}
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