components/update_client/crx_update_item.h

   1 // Copyright 2014 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 COMPONENTS_UPDATE_CLIENT_CRX_UPDATE_ITEM_H_
   6 #define COMPONENTS_UPDATE_CLIENT_CRX_UPDATE_ITEM_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/time/time.h"
  13 #include "base/version.h"
  14 #include "components/update_client/crx_downloader.h"
  15 #include "components/update_client/update_client.h"
  16
  17 namespace update_client {
  18
  19 // This is the one and only per-item state structure. Designed to be hosted
  20 // in a std::vector or a std::list. The two main members are |component|
  21 // which is supplied by the the component updater client and |status| which
  22 // is modified as the item is processed by the update pipeline. The expected
  23 // transition graph is:
  24 //
  25 //                  on-demand                on-demand
  26 //   +---------------------------> kNew <--------------+-------------+
  27 //   |                              |                  |             |
  28 //   |                              V                  |             |
  29 //   |   +--------------------> kChecking -<-------+---|---<-----+   |
  30 //   |   |                          |              |   |         |   |
  31 //   |   |            error         V       no     |   |         |   |
  32 //  kNoUpdate <---------------- [update?] ->---- kUpToDate     kUpdated
  33 //     ^                            |                              ^
  34 //     |                        yes |                              |
  35 //     |        diff=false          V                              |
  36 //     |          +-----------> kCanUpdate                         |
  37 //     |          |                 |                              |
  38 //     |          |                 V              no              |
  39 //     |          |        [differential update?]->----+           |
  40 //     |          |                 |                  |           |
  41 //     |          |             yes |                  |           |
  42 //     |          |   error         V                  |           |
  43 //     |          +---------<- kDownloadingDiff        |           |
  44 //     |          |                 |                  |           |
  45 //     |          |                 |                  |           |
  46 //     |          |   error         V                  |           |
  47 //     |          +---------<- kUpdatingDiff ->--------|-----------+ success
  48 //     |                                               |           |
  49 //     |              error                            V           |
  50 //     +----------------------------------------- kDownloading     |
  51 //     |                                               |           |
  52 //     |              error                            V           |
  53 //     +------------------------------------------ kUpdating ->----+ success
  54 //
  55 // TODO(sorin): this data structure will be further refactored once
  56 // the new update service is in place. For the time being, it remains as-is,
  57 // since it is used by the old component update service.
  58 struct CrxUpdateItem {
  59   enum class State {
  60     kNew,
  61     kChecking,
  62     kCanUpdate,
  63     kDownloadingDiff,
  64     kDownloading,
  65     kDownloaded,
  66     kUpdatingDiff,
  67     kUpdating,
  68     kUpdated,
  69     kUpToDate,
  70     kNoUpdate,
  71     kLastStatus
  72   };
  73
  74   // Call CrxUpdateService::ChangeItemState to change |status|. The function may
  75   // enforce conditions or notify observers of the change.
  76   State state;
  77
  78   std::string id;
  79   CrxComponent component;
  80
  81   base::Time last_check;
  82
  83   // A component can be made available for download from several urls.
  84   std::vector<GURL> crx_urls;
  85   std::vector<GURL> crx_diffurls;
  86
  87   // The from/to version and fingerprint values.
  88   Version previous_version;
  89   Version next_version;
  90   std::string previous_fp;
  91   std::string next_fp;
  92
  93   // True if the current update check cycle is on-demand.
  94   bool on_demand;
  95
  96   // True if the differential update failed for any reason.
  97   bool diff_update_failed;
  98
  99   // The error information for full and differential updates.
 100   // The |error_category| contains a hint about which module in the component
 101   // updater generated the error. The |error_code| constains the error and
 102   // the |extra_code1| usually contains a system error, but it can contain
 103   // any extended information that is relevant to either the category or the
 104   // error itself.
 105   int error_category;
 106   int error_code;
 107   int extra_code1;
 108   int diff_error_category;
 109   int diff_error_code;
 110   int diff_extra_code1;
 111
 112   std::vector<CrxDownloader::DownloadMetrics> download_metrics;
 113
 114   CrxUpdateItem();
 115   ~CrxUpdateItem();
 116
 117   // Function object used to find a specific component.
 118   class FindById {
 119    public:
 120     explicit FindById(const std::string& id) : id_(id) {}
 121
 122     bool operator()(CrxUpdateItem* item) const { return item->id == id_; }
 123
 124    private:
 125     const std::string& id_;
 126   };
 127 };
 128
 129 }  // namespace update_client
 130
 131 #endif  // COMPONENTS_UPDATE_CLIENT_CRX_UPDATE_ITEM_H_