1 // Copyright (c) 2010 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 "chrome/browser/sync/engine/cleanup_disabled_types_command.h" 6 7 #include "chrome/browser/sync/sessions/sync_session.h" 8 #include "chrome/browser/sync/sessions/sync_session_context.h" 9 #include "chrome/browser/sync/syncable/directory_manager.h" 10 #include "chrome/browser/sync/syncable/model_type.h" 11 #include "chrome/browser/sync/syncable/syncable.h" 12 13 namespace browser_sync { 14 15 CleanupDisabledTypesCommand::CleanupDisabledTypesCommand() {} 16 CleanupDisabledTypesCommand::~CleanupDisabledTypesCommand() {} 17 18 void CleanupDisabledTypesCommand::ExecuteImpl(sessions::SyncSession* session) { 19 syncable::ModelTypeSet to_cleanup; 20 for (int i = syncable::FIRST_REAL_MODEL_TYPE; 21 i < syncable::MODEL_TYPE_COUNT; i++) { 22 syncable::ModelType model_type = syncable::ModelTypeFromInt(i); 23 24 if (session->routing_info().count(model_type)) 25 continue; 26 27 // The type isn't currently desired. Because a full directory purge is 28 // slow, we avoid purging undesired types unless we have reason to believe 29 // they were previously enabled. Because purging could theoretically fail, 30 // on the first sync session (when there's no previous routing info) we pay 31 // the full directory scan price once and do a "deep clean" of types that 32 // may potentially need cleanup so that we converge to the correct state. 33 // 34 // in_previous | !in_previous 35 // | 36 // initial_sync_ended should clean | may have attempted cleanup 37 // !initial_sync_ended should clean | may have never been enabled, or 38 // | could have been disabled before 39 // | initial sync ended and cleanup 40 // | may not have happened yet 41 // | (failure, browser restart 42 // | before another sync session,..) 43 const ModelSafeRoutingInfo& previous_routing = 44 session->context()->previous_session_routing_info(); 45 if (previous_routing.empty() || previous_routing.count(model_type)) 46 to_cleanup.insert(model_type); 47 } 48 49 if (to_cleanup.empty()) 50 return; 51 52 syncable::ScopedDirLookup dir(session->context()->directory_manager(), 53 session->context()->account_name()); 54 if (!dir.good()) { 55 LOG(ERROR) << "Scoped dir lookup failed!"; 56 return; 57 } 58 59 dir->PurgeEntriesWithTypeIn(to_cleanup); 60 } 61 62 } // namespace browser_sync 63 64
