sync/engine/get_updates_processor.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 SYNC_ENGINE_GET_UPDATES_PROCESSOR_H
   6 #define SYNC_ENGINE_GET_UPDATES_PROCESSOR_H
   7
   8 #include <map>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/gtest_prod_util.h"
  13 #include "sync/base/sync_export.h"
  14 #include "sync/internal_api/public/base/model_type.h"
  15 #include "sync/internal_api/public/engine/model_safe_worker.h"
  16 #include "sync/protocol/sync.pb.h"
  17 #include "sync/sessions/model_type_registry.h"
  18
  19 namespace sync_pb {
  20 class GetUpdatesMessage;
  21 class GetUpdatesResponse;
  22 }  // namespace sync_pb
  23
  24 namespace syncer {
  25
  26 namespace sessions {
  27 class StatusController;
  28 class SyncSession;
  29 class SyncSessionContext;
  30 class DebugInfoGetter;
  31 }  // namespace sessions
  32
  33 namespace syncable {
  34 class Directory;
  35 }  // namespace syncable
  36
  37 class GetUpdatesDelegate;
  38
  39 // This class manages the set of per-type syncer objects.
  40 //
  41 // It owns these types and hides the details of iterating over all of them.
  42 // Most methods allow the caller to specify a subset of types on which the
  43 // operation is to be applied.  It is a logic error if the supplied set of types
  44 // contains a type which was not previously registered with the manager.
  45 class SYNC_EXPORT_PRIVATE GetUpdatesProcessor {
  46  public:
  47   explicit GetUpdatesProcessor(UpdateHandlerMap* update_handler_map,
  48                                const GetUpdatesDelegate& delegate);
  49   ~GetUpdatesProcessor();
  50
  51   // Downloads and processes a batch of updates for the specified types.
  52   //
  53   // Returns SYNCER_OK if the download succeeds, SERVER_MORE_TO_DOWNLOAD if the
  54   // download succeeded but there are still some updates left to fetch on the
  55   // server, or an appropriate error value in case of failure.
  56   SyncerError DownloadUpdates(
  57       ModelTypeSet request_types,
  58       sessions::SyncSession* session,
  59       bool create_mobile_bookmarks_folder);
  60
  61   // Applies any downloaded and processed updates.
  62   void ApplyUpdates(
  63       ModelTypeSet gu_types,
  64       sessions::StatusController* status_controller);
  65
  66  private:
  67   // Populates a GetUpdates request message with per-type information.
  68   void PrepareGetUpdates(
  69       ModelTypeSet gu_types,
  70       sync_pb::ClientToServerMessage* message);
  71
  72   // Sends the specified message to the server and stores the response in a
  73   // member of the |session|'s StatusController.
  74   SyncerError ExecuteDownloadUpdates(ModelTypeSet request_types,
  75                                      sessions::SyncSession* session,
  76                                      sync_pb::ClientToServerMessage* msg);
  77
  78   // Helper function for processing responses from the server.  Defined here for
  79   // testing.
  80   SyncerError ProcessResponse(const sync_pb::GetUpdatesResponse& gu_response,
  81                               ModelTypeSet proto_request_types,
  82                               sessions::StatusController* status);
  83
  84   // Processes a GetUpdates responses for each type.
  85   syncer::SyncerError ProcessGetUpdatesResponse(
  86       ModelTypeSet gu_types,
  87       const sync_pb::GetUpdatesResponse& gu_response,
  88       sessions::StatusController* status_controller);
  89
  90   static void CopyClientDebugInfo(
  91       sessions::DebugInfoGetter* debug_info_getter,
  92       sync_pb::DebugInfo* debug_info);
  93
  94   FRIEND_TEST_ALL_PREFIXES(GetUpdatesProcessorTest, BookmarkNudge);
  95   FRIEND_TEST_ALL_PREFIXES(GetUpdatesProcessorTest, NotifyMany);
  96   FRIEND_TEST_ALL_PREFIXES(GetUpdatesProcessorTest, InitialSyncRequest);
  97   FRIEND_TEST_ALL_PREFIXES(GetUpdatesProcessorTest, ConfigureTest);
  98   FRIEND_TEST_ALL_PREFIXES(GetUpdatesProcessorTest, PollTest);
  99   FRIEND_TEST_ALL_PREFIXES(GetUpdatesProcessorTest, RetryTest);
 100   FRIEND_TEST_ALL_PREFIXES(GetUpdatesProcessorTest, NudgeWithRetryTest);
 101   FRIEND_TEST_ALL_PREFIXES(GetUpdatesProcessorTest, InvalidResponse);
 102   FRIEND_TEST_ALL_PREFIXES(GetUpdatesProcessorTest, MoreToDownloadResponse);
 103   FRIEND_TEST_ALL_PREFIXES(GetUpdatesProcessorTest, NormalResponseTest);
 104   FRIEND_TEST_ALL_PREFIXES(DownloadUpdatesDebugInfoTest,
 105                            VerifyCopyClientDebugInfo_Empty);
 106   FRIEND_TEST_ALL_PREFIXES(DownloadUpdatesDebugInfoTest, VerifyCopyOverwrites);
 107
 108   // A map of 'update handlers', one for each enabled type.
 109   // This must be kept in sync with the routing info.  Our temporary solution to
 110   // that problem is to initialize this map in set_routing_info().
 111   UpdateHandlerMap* update_handler_map_;
 112
 113   const GetUpdatesDelegate& delegate_;
 114
 115   DISALLOW_COPY_AND_ASSIGN(GetUpdatesProcessor);
 116 };
 117
 118 }  // namespace syncer
 119
 120 #endif  // SYNC_ENGINE_GET_UPDATES_PROCESSOR_H_