1/*
2 * Copyright (C) 2010 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.gallery3d.app;
18
19import android.app.Application;
20import android.content.Context;
21import android.os.AsyncTask;
22
23import com.android.gallery3d.data.DataManager;
24import com.android.gallery3d.data.DownloadCache;
25import com.android.gallery3d.data.ImageCacheService;
26import com.android.gallery3d.gadget.WidgetUtils;
27import com.android.gallery3d.picasasource.PicasaSource;
28import com.android.gallery3d.util.GalleryUtils;
29import com.android.gallery3d.util.LightCycleHelper;
30import com.android.gallery3d.util.ThreadPool;
31import com.android.gallery3d.util.UsageStatistics;
32
33import java.io.File;
34
35public class GalleryAppImpl extends Application implements GalleryApp {
36
37    private static final String DOWNLOAD_FOLDER = "download";
38    private static final long DOWNLOAD_CAPACITY = 64 * 1024 * 1024; // 64M
39
40    private ImageCacheService mImageCacheService;
41    private Object mLock = new Object();
42    private DataManager mDataManager;
43    private ThreadPool mThreadPool;
44    private DownloadCache mDownloadCache;
45
46    @Override
47    public void onCreate() {
48        super.onCreate();
49        initializeAsyncTask();
50        GalleryUtils.initialize(this);
51        WidgetUtils.initialize(this);
52        PicasaSource.initialize(this);
53        UsageStatistics.initialize(this);
54    }
55
56    @Override
57    public Context getAndroidContext() {
58        return this;
59    }
60
61    @Override
62    public synchronized DataManager getDataManager() {
63        if (mDataManager == null) {
64            mDataManager = new DataManager(this);
65            mDataManager.initializeSourceMap();
66        }
67        return mDataManager;
68    }
69
70
71    @Override
72    public ImageCacheService getImageCacheService() {
73        // This method may block on file I/O so a dedicated lock is needed here.
74        synchronized (mLock) {
75            if (mImageCacheService == null) {
76                mImageCacheService = new ImageCacheService(getAndroidContext());
77            }
78            return mImageCacheService;
79        }
80    }
81
82    @Override
83    public synchronized ThreadPool getThreadPool() {
84        if (mThreadPool == null) {
85            mThreadPool = new ThreadPool();
86        }
87        return mThreadPool;
88    }
89
90    @Override
91    public synchronized DownloadCache getDownloadCache() {
92        if (mDownloadCache == null) {
93            File cacheDir = new File(getExternalCacheDir(), DOWNLOAD_FOLDER);
94
95            if (!cacheDir.isDirectory()) cacheDir.mkdirs();
96
97            if (!cacheDir.isDirectory()) {
98                throw new RuntimeException(
99                        "fail to create: " + cacheDir.getAbsolutePath());
100            }
101            mDownloadCache = new DownloadCache(this, cacheDir, DOWNLOAD_CAPACITY);
102        }
103        return mDownloadCache;
104    }
105
106    private void initializeAsyncTask() {
107        // AsyncTask class needs to be loaded in UI thread.
108        // So we load it here to comply the rule.
109        try {
110            Class.forName(AsyncTask.class.getName());
111        } catch (ClassNotFoundException e) {
112        }
113    }
114}
115