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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
// Copyright (c) 2012 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 "components/sync/engine_impl/syncer.h"
#include <memory>
#include "base/auto_reset.h"
#include "base/logging.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "components/sync/base/cancelation_signal.h"
#include "components/sync/engine_impl/apply_control_data_updates.h"
#include "components/sync/engine_impl/clear_server_data.h"
#include "components/sync/engine_impl/commit.h"
#include "components/sync/engine_impl/commit_processor.h"
#include "components/sync/engine_impl/cycle/nudge_tracker.h"
#include "components/sync/engine_impl/cycle/sync_cycle.h"
#include "components/sync/engine_impl/get_updates_delegate.h"
#include "components/sync/engine_impl/get_updates_processor.h"
#include "components/sync/engine_impl/net/server_connection_manager.h"
#include "components/sync/syncable/directory.h"
#include "components/sync/syncable/mutable_entry.h"
namespace syncer {
// TODO(akalin): We may want to propagate this switch up
// eventually.
#if defined(OS_ANDROID) || defined(OS_IOS)
static const bool kCreateMobileBookmarksFolder = true;
#else
static const bool kCreateMobileBookmarksFolder = false;
#endif
Syncer::Syncer(CancelationSignal* cancelation_signal)
: cancelation_signal_(cancelation_signal), is_syncing_(false) {}
Syncer::~Syncer() {}
bool Syncer::ExitRequested() {
return cancelation_signal_->IsSignalled();
}
bool Syncer::IsSyncing() const {
return is_syncing_;
}
bool Syncer::NormalSyncShare(ModelTypeSet request_types,
NudgeTracker* nudge_tracker,
SyncCycle* cycle) {
base::AutoReset<bool> is_syncing(&is_syncing_, true);
HandleCycleBegin(cycle);
if (nudge_tracker->IsGetUpdatesRequired() ||
cycle->context()->ShouldFetchUpdatesBeforeCommit()) {
VLOG(1) << "Downloading types " << ModelTypeSetToString(request_types);
NormalGetUpdatesDelegate normal_delegate(*nudge_tracker);
GetUpdatesProcessor get_updates_processor(
cycle->context()->model_type_registry()->update_handler_map(),
normal_delegate);
if (!DownloadAndApplyUpdates(&request_types, cycle, &get_updates_processor,
kCreateMobileBookmarksFolder)) {
return HandleCycleEnd(cycle, nudge_tracker->GetLegacySource());
}
}
VLOG(1) << "Committing from types " << ModelTypeSetToString(request_types);
CommitProcessor commit_processor(
cycle->context()->model_type_registry()->commit_contributor_map());
SyncerError commit_result = BuildAndPostCommits(request_types, nudge_tracker,
cycle, &commit_processor);
cycle->mutable_status_controller()->set_commit_result(commit_result);
return HandleCycleEnd(cycle, nudge_tracker->GetLegacySource());
}
bool Syncer::ConfigureSyncShare(
ModelTypeSet request_types,
sync_pb::GetUpdatesCallerInfo::GetUpdatesSource source,
SyncCycle* cycle) {
base::AutoReset<bool> is_syncing(&is_syncing_, true);
VLOG(1) << "Configuring types " << ModelTypeSetToString(request_types);
HandleCycleBegin(cycle);
ConfigureGetUpdatesDelegate configure_delegate(source);
GetUpdatesProcessor get_updates_processor(
cycle->context()->model_type_registry()->update_handler_map(),
configure_delegate);
DownloadAndApplyUpdates(&request_types, cycle, &get_updates_processor,
kCreateMobileBookmarksFolder);
return HandleCycleEnd(cycle, source);
}
bool Syncer::PollSyncShare(ModelTypeSet request_types, SyncCycle* cycle) {
base::AutoReset<bool> is_syncing(&is_syncing_, true);
VLOG(1) << "Polling types " << ModelTypeSetToString(request_types);
HandleCycleBegin(cycle);
PollGetUpdatesDelegate poll_delegate;
GetUpdatesProcessor get_updates_processor(
cycle->context()->model_type_registry()->update_handler_map(),
poll_delegate);
DownloadAndApplyUpdates(&request_types, cycle, &get_updates_processor,
kCreateMobileBookmarksFolder);
return HandleCycleEnd(cycle, sync_pb::GetUpdatesCallerInfo::PERIODIC);
}
bool Syncer::DownloadAndApplyUpdates(ModelTypeSet* request_types,
SyncCycle* cycle,
GetUpdatesProcessor* get_updates_processor,
bool create_mobile_bookmarks_folder) {
SyncerError download_result = UNSET;
do {
download_result = get_updates_processor->DownloadUpdates(
request_types, cycle, create_mobile_bookmarks_folder);
} while (download_result == SERVER_MORE_TO_DOWNLOAD);
// Exit without applying if we're shutting down or an error was detected.
if (download_result != SYNCER_OK || ExitRequested())
return false;
{
TRACE_EVENT0("sync", "ApplyUpdates");
// Control type updates always get applied first.
ApplyControlDataUpdates(cycle->context()->directory());
// Apply upates to the other types. May or may not involve cross-thread
// traffic, depending on the underlying update handlers and the GU type's
// delegate.
get_updates_processor->ApplyUpdates(*request_types,
cycle->mutable_status_controller());
cycle->context()->set_hierarchy_conflict_detected(
cycle->status_controller().num_hierarchy_conflicts() > 0);
cycle->SendEventNotification(SyncCycleEvent::STATUS_CHANGED);
}
return !ExitRequested();
}
SyncerError Syncer::BuildAndPostCommits(ModelTypeSet request_types,
NudgeTracker* nudge_tracker,
SyncCycle* cycle,
CommitProcessor* commit_processor) {
// The ExitRequested() check is unnecessary, since we should start getting
// errors from the ServerConnectionManager if an exist has been requested.
// However, it doesn't hurt to check it anyway.
while (!ExitRequested()) {
std::unique_ptr<Commit> commit(
Commit::Init(request_types, cycle->context()->GetEnabledTypes(),
cycle->context()->max_commit_batch_size(),
cycle->context()->account_name(),
cycle->context()->directory()->cache_guid(),
cycle->context()->cookie_jar_mismatch(),
cycle->context()->cookie_jar_empty(), commit_processor,
cycle->context()->extensions_activity()));
if (!commit) {
break;
}
SyncerError error = commit->PostAndProcessResponse(
nudge_tracker, cycle, cycle->mutable_status_controller(),
cycle->context()->extensions_activity());
commit->CleanUp();
if (error != SYNCER_OK) {
return error;
}
}
return SYNCER_OK;
}
void Syncer::HandleCycleBegin(SyncCycle* cycle) {
cycle->mutable_status_controller()->UpdateStartTime();
cycle->SendEventNotification(SyncCycleEvent::SYNC_CYCLE_BEGIN);
}
bool Syncer::HandleCycleEnd(
SyncCycle* cycle,
sync_pb::GetUpdatesCallerInfo::GetUpdatesSource source) {
if (ExitRequested())
return false;
cycle->SendSyncCycleEndEventNotification(source);
bool success =
!HasSyncerError(cycle->status_controller().model_neutral_state());
if (success && source == sync_pb::GetUpdatesCallerInfo::PERIODIC) {
cycle->mutable_status_controller()->UpdatePollTime();
}
return success;
}
bool Syncer::PostClearServerData(SyncCycle* cycle) {
DCHECK(cycle);
ClearServerData clear_server_data(cycle->context()->account_name());
const SyncerError post_result = clear_server_data.SendRequest(cycle);
return post_result == SYNCER_OK;
}
} // namespace syncer
|
