1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/sync/test/integration/updated_progress_marker_checker.h"
#include "chrome/browser/sync/profile_sync_service.h"
#include "sync/internal_api/public/sessions/sync_session_snapshot.h"
UpdatedProgressMarkerChecker::UpdatedProgressMarkerChecker(
ProfileSyncService* service) : SingleClientStatusChangeChecker(service) {}
UpdatedProgressMarkerChecker::~UpdatedProgressMarkerChecker() {}
bool UpdatedProgressMarkerChecker::IsExitConditionSatisfied() {
// Checks to see if our self-notify sync cycle has completed and
// there's nothing to commit.
//
// If we assume that no one else is committing at this time and that the
// current client did not commit anything in its previous sync cycle, then
// this client has the latest progress markers.
//
// The !service()->HasUnsyncedItems() check makes sure that we have nothing to
// commit.
//
// There is a subtle race condition here. While committing items, the syncer
// will unset the IS_UNSYNCED bits in the directory. However, the evidence of
// this current sync cycle won't be available from GetLastSessionSnapshot()
// until the sync cycle completes. If we query this condition between the
// commit response processing and the end of the sync cycle, we could return a
// false positive.
//
// In practice, this doesn't happen very often because we only query the
// status when the waiting first starts and when we receive notification of a
// sync session complete or other significant event from the
// ProfileSyncService. If we're calling this right after the sync session
// completes, then the snapshot is much more likely to be up to date.
const syncer::sessions::SyncSessionSnapshot& snap =
service()->GetLastSessionSnapshot();
return snap.model_neutral_state().num_successful_commits == 0 &&
!service()->HasUnsyncedItems();
}
std::string UpdatedProgressMarkerChecker::GetDebugMessage() const {
return "Waiting for progress markers";
}
|
