1/*
2 * Copyright (C) 2015 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
17package com.android.tv.dvr;
18
19import android.app.AlarmManager;
20import android.app.Service;
21import android.content.Context;
22import android.content.Intent;
23import android.os.Binder;
24import android.os.HandlerThread;
25import android.os.IBinder;
26import android.support.annotation.Nullable;
27import android.support.annotation.VisibleForTesting;
28import android.util.Log;
29
30import com.android.tv.ApplicationSingletons;
31import com.android.tv.TvApplication;
32import com.android.tv.common.feature.CommonFeatures;
33import com.android.tv.util.Clock;
34import com.android.tv.util.RecurringRunner;
35import com.android.tv.common.SoftPreconditions;
36
37/**
38 * DVR Scheduler service.
39 *
40 * <p> This service is responsible for:
41 * <ul>
42 *     <li>Send record commands to TV inputs</li>
43 *     <li>Wake up at proper timing for recording</li>
44 *     <li>Deconflict schedule, handling overlapping times etc.</li>
45 *     <li>
46 *
47 * </ul>
48 *
49 * <p>The service does not stop it self.
50 */
51public class DvrRecordingService extends Service {
52    private static final String TAG = "DvrRecordingService";
53    private static final boolean DEBUG = false;
54    public static final String HANDLER_THREAD_NAME = "DvrRecordingService-handler";
55
56    public static void startService(Context context) {
57        Intent dvrSchedulerIntent = new Intent(context, DvrRecordingService.class);
58        context.startService(dvrSchedulerIntent);
59    }
60
61    private final Clock mClock = Clock.SYSTEM;
62    private RecurringRunner mReaperRunner;
63    private WritableDvrDataManager mDataManager;
64
65    /**
66     * Class for clients to access. Because we know this service always
67     * runs in the same process as its clients, we don't need to deal with
68     * IPC.
69     */
70    public class SchedulerBinder extends Binder {
71        Scheduler getScheduler() {
72            return mScheduler;
73        }
74    }
75
76    private final IBinder mBinder = new SchedulerBinder();
77
78    private Scheduler mScheduler;
79    private HandlerThread mHandlerThread;
80
81    @Override
82    public void onCreate() {
83        if (DEBUG) Log.d(TAG, "onCreate");
84        super.onCreate();
85        SoftPreconditions.checkFeatureEnabled(this, CommonFeatures.DVR, TAG);
86        ApplicationSingletons singletons = TvApplication.getSingletons(this);
87        mDataManager = (WritableDvrDataManager) singletons.getDvrDataManager();
88
89        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
90        // mScheduler may have been set for testing.
91        if (mScheduler == null) {
92            mHandlerThread = new HandlerThread(HANDLER_THREAD_NAME);
93            mHandlerThread.start();
94            mScheduler = new Scheduler(mHandlerThread.getLooper(), singletons.getDvrManager(),
95                    singletons.getDvrSessionManger(), mDataManager,
96                    singletons.getChannelDataManager(), this, mClock, alarmManager);
97        }
98        mDataManager.addScheduledRecordingListener(mScheduler);
99        mReaperRunner = new RecurringRunner(this, java.util.concurrent.TimeUnit.DAYS.toMillis(1),
100                new ScheduledProgramReaper(mDataManager, mClock), null);
101        mReaperRunner.start();
102    }
103
104    @Override
105    public int onStartCommand(Intent intent, int flags, int startId) {
106        if (DEBUG) Log.d(TAG, "onStartCommand (" + intent + "," + flags + "," + startId + ")");
107        mScheduler.update();
108        return START_STICKY;
109    }
110
111    @Override
112    public void onDestroy() {
113        if (DEBUG) Log.d(TAG, "onDestroy");
114        mReaperRunner.stop();
115        mDataManager.removeScheduledRecordingListener(mScheduler);
116        mScheduler = null;
117        if (mHandlerThread != null) {
118            mHandlerThread.quit();
119            mHandlerThread = null;
120        }
121        super.onDestroy();
122    }
123
124    @Nullable
125    @Override
126    public IBinder onBind(Intent intent) {
127        return mBinder;
128    }
129
130    @VisibleForTesting
131    void setScheduler(Scheduler scheduler) {
132        Log.i(TAG, "Setting scheduler for tests to " + scheduler);
133        mScheduler = scheduler;
134    }
135}
136