sync/engine/commit_processor.cc

   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 #include "sync/engine/commit_processor.h"
   6
   7 #include <map>
   8
   9 #include "sync/engine/commit_contribution.h"
  10 #include "sync/engine/commit_contributor.h"
  11 #include "sync/protocol/sync.pb.h"
  12
  13 namespace syncer {
  14
  15 typedef std::map<ModelType, size_t> TypeToIndexMap;
  16
  17 CommitProcessor::CommitProcessor(CommitContributorMap* commit_contributor_map)
  18     : commit_contributor_map_(commit_contributor_map) {}
  19
  20 CommitProcessor::~CommitProcessor() {}
  21
  22 void CommitProcessor::GatherCommitContributions(
  23     ModelTypeSet commit_types,
  24     size_t max_entries,
  25     Commit::ContributionMap* contributions) {
  26   size_t num_entries = 0;
  27   for (ModelTypeSet::Iterator it = commit_types.First();
  28        it.Good(); it.Inc()) {
  29     CommitContributorMap::iterator cm_it =
  30         commit_contributor_map_->find(it.Get());
  31     if (cm_it == commit_contributor_map_->end()) {
  32       NOTREACHED()
  33           << "Could not find requested type " << ModelTypeToString(it.Get())
  34           << " in contributor map.";
  35       continue;
  36     }
  37     size_t spaces_remaining = max_entries - num_entries;
  38     scoped_ptr<CommitContribution> contribution =
  39         cm_it->second->GetContribution(spaces_remaining);
  40     if (contribution) {
  41       num_entries += contribution->GetNumEntries();
  42       contributions->insert(it.Get(), contribution.Pass());
  43     }
  44     if (num_entries >= max_entries) {
  45       DCHECK_EQ(num_entries, max_entries)
  46           << "Number of commit entries exceeeds maximum";
  47       break;
  48     }
  49   }
  50 }
  51
  52 }  // namespace syncer