1/*
2 * Copyright (C) 2017-2018 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#if ENABLE(RESOURCE_LOAD_STATISTICS)
29
30#include <wtf/Forward.h>
31#include <wtf/MonotonicTime.h>
32#include <wtf/RunLoop.h>
33#include <wtf/WallTime.h>
34#include <wtf/WeakPtr.h>
35#include <wtf/WorkQueue.h>
36#include <wtf/text/WTFString.h>
37
38namespace WebCore {
39class FileMonitor;
40}
41
42namespace WebKit {
43
44class ResourceLoadStatisticsMemoryStore;
45
46// Can only be constructed / destroyed / used from the WebResourceLoadStatisticsStore's statistic queue.
47class ResourceLoadStatisticsPersistentStorage : public CanMakeWeakPtr<ResourceLoadStatisticsPersistentStorage> {
48public:
49 ResourceLoadStatisticsPersistentStorage(ResourceLoadStatisticsMemoryStore&, WorkQueue&, const String& storageDirectoryPath);
50 ~ResourceLoadStatisticsPersistentStorage();
51
52 void clear();
53
54 enum class ForceImmediateWrite { No, Yes, };
55 void scheduleOrWriteMemoryStore(ForceImmediateWrite);
56
57private:
58 String storageDirectoryPath() const;
59 String resourceLogFilePath() const;
60
61 void startMonitoringDisk();
62 void stopMonitoringDisk();
63 void monitorDirectoryForNewStatistics();
64
65 void writeMemoryStoreToDisk();
66 void populateMemoryStoreFromDisk();
67 void excludeFromBackup() const;
68 void refreshMemoryStoreFromDisk();
69
70 ResourceLoadStatisticsMemoryStore& m_memoryStore;
71 Ref<WorkQueue> m_workQueue;
72 const String m_storageDirectoryPath;
73 std::unique_ptr<WebCore::FileMonitor> m_fileMonitor;
74 WallTime m_lastStatisticsFileSyncTime;
75 MonotonicTime m_lastStatisticsWriteTime;
76 bool m_hasPendingWrite { false };
77};
78
79}
80
81#endif
82