chrome/browser/android/history_report/delta_file_service.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_ANDROID_HISTORY_REPORT_DELTA_FILE_SERVICE_H_
   6 #define CHROME_BROWSER_ANDROID_HISTORY_REPORT_DELTA_FILE_SERVICE_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/threading/sequenced_worker_pool.h"
  13
  14 class GURL;
  15
  16 namespace base {
  17 class FilePath;
  18 }  // namespace base
  19
  20 namespace history_report {
  21
  22 class DeltaFileEntryWithData;
  23 class DeltaFileBackend;
  24
  25 // Delta file for gmscore integration and history reporting.
  26 class DeltaFileService {
  27  public:
  28   explicit DeltaFileService(const base::FilePath& dir);
  29   ~DeltaFileService();
  30
  31   // Adds new addtion entry to delta file.
  32   void PageAdded(const GURL& url);
  33   // Adds new deletion entry to delta file.
  34   void PageDeleted(const GURL& url);
  35   // Removes all delta file entries with seqno <= lower_bound.
  36   // Returns max seqno in delta file.
  37   int64 Trim(int64 lower_bound);
  38   // Removes all data from delta file and populates it with new addition
  39   // entries for given urls.
  40   bool Recreate(const std::vector<std::string>& urls);
  41   // Provides up to limit delta file entries with seqno > last_seq_no.
  42   scoped_ptr<std::vector<DeltaFileEntryWithData> > Query(int64 last_seq_no,
  43                                                          int32 limit);
  44   // Removes all entries from delta file.
  45   void Clear();
  46
  47   // Dumps internal state to string.
  48   std::string Dump();
  49
  50  private:
  51
  52   base::SequencedWorkerPool::SequenceToken worker_pool_token_;
  53   scoped_ptr<DeltaFileBackend> delta_file_backend_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(DeltaFileService);
  56 };
  57
  58 }  // namespace history_report
  59
  60 #endif  // CHROME_BROWSER_ANDROID_HISTORY_REPORT_DELTA_FILE_SERVICE_H_