syncer.cc revision 4a5e2dc747d50c653511c68ccb2cfbfb740bd5a7
1c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// Copyright (c) 2010 The Chromium Authors. All rights reserved.
2c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// Use of this source code is governed by a BSD-style license that can be
3c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// found in the LICENSE file.
4c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
5c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/syncer.h"
6c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
7c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "base/message_loop.h"
8c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "base/time.h"
9731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick#include "chrome/browser/browser_thread.h"
10c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/apply_updates_command.h"
11c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/build_and_process_conflict_sets_command.h"
12c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/build_commit_command.h"
13c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/cleanup_disabled_types_command.h"
143345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#include "chrome/browser/sync/engine/clear_data_command.h"
15c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/conflict_resolver.h"
16c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/download_updates_command.h"
17c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/get_commit_ids_command.h"
18c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/net/server_connection_manager.h"
19c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/post_commit_message_command.h"
20c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/process_commit_response_command.h"
21c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/process_updates_command.h"
22c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/resolve_conflicts_command.h"
23c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/store_timestamps_command.h"
24c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/syncer_end_command.h"
25c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/syncer_types.h"
26c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/syncer_util.h"
27c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/syncproto.h"
28c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/engine/verify_updates_command.h"
29c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/syncable/directory_manager.h"
30c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/syncable/syncable-inl.h"
31c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "chrome/browser/sync/syncable/syncable.h"
32c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
33c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing base::TimeDelta;
34c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing sync_pb::ClientCommand;
35c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::Blob;
36c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::IS_UNAPPLIED_UPDATE;
37c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::SERVER_CTIME;
38c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::SERVER_IS_DEL;
39c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::SERVER_IS_DIR;
40c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::SERVER_MTIME;
41c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::SERVER_NON_UNIQUE_NAME;
42c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::SERVER_PARENT_ID;
43c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::SERVER_POSITION_IN_PARENT;
44c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::SERVER_SPECIFICS;
45c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::SERVER_VERSION;
46c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::SYNCER;
47c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::ScopedDirLookup;
48c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing syncable::WriteTransaction;
49c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
50c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochnamespace browser_sync {
51c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
52c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing sessions::StatusController;
53c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing sessions::SyncSession;
54c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing sessions::ConflictProgress;
55c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
56c407dc5cd9bdc5668497f21b26b09d988ab439deBen MurdochSyncer::Syncer(sessions::SyncSessionContext* context)
57c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch    : early_exit_requested_(false),
58c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      max_commit_batch_size_(kDefaultMaxCommitBatchSize),
59c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      resolver_scoper_(context, &resolver_),
60c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      context_(context),
614a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch      updates_source_(sync_pb::GetUpdatesCallerInfo::UNKNOWN,
624a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch                      syncable::ModelTypeBitSet()),
63c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      pre_conflict_resolution_closure_(NULL) {
64c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  ScopedDirLookup dir(context->directory_manager(), context->account_name());
65c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  // The directory must be good here.
66c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  CHECK(dir.good());
67c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch}
68c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
69731df977c0511bca2206b5f333555b1205ff1f43Iain MerrickSyncer::~Syncer() {}
70c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
713345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickbool Syncer::ExitRequested() {
723345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick  AutoLock lock(early_exit_requested_lock_);
733345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick  return early_exit_requested_;
743345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick}
753345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick
763345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickvoid Syncer::RequestEarlyExit() {
773345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick  AutoLock lock(early_exit_requested_lock_);
783345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick  early_exit_requested_ = true;
793345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick}
803345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick
81c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochbool Syncer::SyncShare(sessions::SyncSession::Delegate* delegate) {
82c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  sessions::SyncSession session(context_, delegate);
83c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  return SyncShare(&session);
84c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch}
85c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
86c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochbool Syncer::SyncShare(sessions::SyncSession* session) {
874a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch  sessions::SyncSourceInfo source = TestAndSetUpdatesSource();
883345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick  session->set_source(source);
894a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch  if (sync_pb::GetUpdatesCallerInfo::CLEAR_PRIVATE_DATA == source.first) {
903345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    SyncShare(session, CLEAR_PRIVATE_DATA, SYNCER_END);
913345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    return false;
923345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick  } else {
933345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    // This isn't perfect, as we can end up bundling extensions activity
943345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    // intended for the next session into the current one.  We could do a
953345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    // test-and-reset as with the source, but note that also falls short if
963345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    // the commit request fails (e.g. due to lost connection), as we will
973345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    // fall all the way back to the syncer thread main loop in that case, and
983345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    // wind up creating a new session when a connection is established, losing
993345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    // the records set here on the original attempt.  This should provide us
1003345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    // with the right data "most of the time", and we're only using this for
1013345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    // analysis purposes, so Law of Large Numbers FTW.
1023345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    context_->extensions_monitor()->GetAndClearRecords(
1033345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick        session->mutable_extensions_activity());
1043345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    SyncShare(session, SYNCER_BEGIN, SYNCER_END);
1053345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick    return session->HasMoreToSync();
1063345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick  }
107c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch}
108c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
109c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochbool Syncer::SyncShare(SyncerStep first_step, SyncerStep last_step,
110c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch                       sessions::SyncSession::Delegate* delegate) {
111c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  sessions::SyncSession session(context_, delegate);
112c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  SyncShare(&session, first_step, last_step);
113c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  return session.HasMoreToSync();
114c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch}
115c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
116c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochvoid Syncer::SyncShare(sessions::SyncSession* session,
117c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch                       const SyncerStep first_step,
118c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch                       const SyncerStep last_step) {
119c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  SyncerStep current_step = first_step;
120c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
121c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  SyncerStep next_step = current_step;
122c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  while (!ExitRequested()) {
123c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch    switch (current_step) {
124c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case SYNCER_BEGIN:
125731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Syncer Begin";
126c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        next_step = CLEANUP_DISABLED_TYPES;
127c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
128c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case CLEANUP_DISABLED_TYPES: {
129731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Cleaning up disabled types";
130c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        CleanupDisabledTypesCommand cleanup;
131c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        cleanup.Execute(session);
132c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        next_step = DOWNLOAD_UPDATES;
133c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
134c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
135c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case DOWNLOAD_UPDATES: {
136731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Downloading Updates";
137c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        DownloadUpdatesCommand download_updates;
138c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        download_updates.Execute(session);
139c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        next_step = PROCESS_CLIENT_COMMAND;
140c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
141c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
142c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case PROCESS_CLIENT_COMMAND: {
143731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Processing Client Command";
144c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        ProcessClientCommand(session);
145c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        next_step = VERIFY_UPDATES;
146c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
147c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
148c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case VERIFY_UPDATES: {
149731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Verifying Updates";
150c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        VerifyUpdatesCommand verify_updates;
151c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        verify_updates.Execute(session);
152c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        next_step = PROCESS_UPDATES;
153c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
154c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
155c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case PROCESS_UPDATES: {
1564a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch        VLOG(1) << "Processing Updates";
157c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        ProcessUpdatesCommand process_updates;
158c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        process_updates.Execute(session);
159c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        next_step = STORE_TIMESTAMPS;
160c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
161c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
162c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case STORE_TIMESTAMPS: {
163731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Storing timestamps";
164c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        StoreTimestampsCommand store_timestamps;
165c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        store_timestamps.Execute(session);
166c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        // We should download all of the updates before attempting to process
167c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        // them.
168c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        if (session->status_controller()->ServerSaysNothingMoreToDownload() ||
169c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch            !session->status_controller()->download_updates_succeeded()) {
170c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          next_step = APPLY_UPDATES;
171c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        } else {
172c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          next_step = DOWNLOAD_UPDATES;
173c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        }
174c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
175c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
176c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case APPLY_UPDATES: {
177731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Applying Updates";
178c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        ApplyUpdatesCommand apply_updates;
179c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        apply_updates.Execute(session);
180c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        next_step = BUILD_COMMIT_REQUEST;
181c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
182c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
183c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      // These two steps are combined since they are executed within the same
184c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      // write transaction.
185c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case BUILD_COMMIT_REQUEST: {
186c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        session->status_controller()->set_syncing(true);
187c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
188731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Processing Commit Request";
189c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        ScopedDirLookup dir(context_->directory_manager(),
190c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch                            context_->account_name());
191c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        if (!dir.good()) {
192c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          LOG(ERROR) << "Scoped dir lookup failed!";
193c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          return;
194c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        }
195c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        WriteTransaction trans(dir, SYNCER, __FILE__, __LINE__);
196c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        sessions::ScopedSetSessionWriteTransaction set_trans(session, &trans);
197c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
198731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Getting the Commit IDs";
199c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        GetCommitIdsCommand get_commit_ids_command(max_commit_batch_size_);
200c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        get_commit_ids_command.Execute(session);
201c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
202c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        if (!session->status_controller()->commit_ids().empty()) {
203731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick          VLOG(1) << "Building a commit message";
204c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          BuildCommitCommand build_commit_command;
205c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          build_commit_command.Execute(session);
206c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
207c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          next_step = POST_COMMIT_MESSAGE;
208c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        } else {
209c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          next_step = BUILD_AND_PROCESS_CONFLICT_SETS;
210c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        }
211c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
212c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
213c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
214c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case POST_COMMIT_MESSAGE: {
215731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Posting a commit request";
216c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        PostCommitMessageCommand post_commit_command;
217c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        post_commit_command.Execute(session);
218c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        next_step = PROCESS_COMMIT_RESPONSE;
219c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
220c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
221c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case PROCESS_COMMIT_RESPONSE: {
222731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Processing the commit response";
223c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        session->status_controller()->reset_num_conflicting_commits();
224c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        ProcessCommitResponseCommand process_response_command;
225c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        process_response_command.Execute(session);
226c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        next_step = BUILD_AND_PROCESS_CONFLICT_SETS;
227c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
228c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
229c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case BUILD_AND_PROCESS_CONFLICT_SETS: {
230731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Building and Processing Conflict Sets";
231c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        BuildAndProcessConflictSetsCommand build_process_conflict_sets;
232c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        build_process_conflict_sets.Execute(session);
233c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        if (session->status_controller()->conflict_sets_built())
234c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          next_step = SYNCER_END;
235c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        else
236c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          next_step = RESOLVE_CONFLICTS;
237c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
238c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
239c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case RESOLVE_CONFLICTS: {
240731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Resolving Conflicts";
241c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
242c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        // Trigger the pre_conflict_resolution_closure_, which is a testing
243c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        // hook for the unit tests, if it is non-NULL.
244c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        if (pre_conflict_resolution_closure_) {
245c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          pre_conflict_resolution_closure_->Run();
246c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        }
247c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
248c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        StatusController* status = session->status_controller();
249c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        status->reset_conflicts_resolved();
250c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        ResolveConflictsCommand resolve_conflicts_command;
251c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        resolve_conflicts_command.Execute(session);
252c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        if (status->HasConflictingUpdates())
253c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          next_step = APPLY_UPDATES_TO_RESOLVE_CONFLICTS;
254c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        else
255c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          next_step = SYNCER_END;
256c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
257c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
258c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case APPLY_UPDATES_TO_RESOLVE_CONFLICTS: {
259c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        StatusController* status = session->status_controller();
260731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Applying updates to resolve conflicts";
261c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        ApplyUpdatesCommand apply_updates;
262c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        int before_conflicting_updates = status->TotalNumConflictingItems();
263c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        apply_updates.Execute(session);
264c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        int after_conflicting_updates = status->TotalNumConflictingItems();
265c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        status->update_conflicts_resolved(before_conflicting_updates >
266c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch                                          after_conflicting_updates);
267c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        if (status->conflicts_resolved())
268c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          next_step = RESOLVE_CONFLICTS;
269c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        else
270c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch          next_step = SYNCER_END;
271c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        break;
272c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
2733345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick      case CLEAR_PRIVATE_DATA: {
274731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Clear Private Data";
2753345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick        ClearDataCommand clear_data_command;
2763345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick        clear_data_command.Execute(session);
2773345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick        next_step = SYNCER_END;
2783345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick      }
279c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      case SYNCER_END: {
280731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick        VLOG(1) << "Syncer End";
281c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        SyncerEndCommand syncer_end_command;
282c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        // This will set "syncing" to false, and send out a notification.
283c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        syncer_end_command.Execute(session);
284c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        goto post_while;
285c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      }
286c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      default:
287c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        LOG(ERROR) << "Unknown command: " << current_step;
288c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch    }
289c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch    if (last_step == current_step)
290c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      break;
291c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch    current_step = next_step;
292c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  }
293c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch post_while:
294c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  return;
295c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch}
296c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
297c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochvoid Syncer::ProcessClientCommand(sessions::SyncSession* session) {
298c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  const ClientToServerResponse& response =
299c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch      session->status_controller()->updates_response();
300c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  if (!response.has_client_command())
301c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch    return;
302c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  const ClientCommand& command = response.client_command();
303c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
304c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  // The server limits the number of items a client can commit in one batch.
305c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  if (command.has_max_commit_batch_size())
306c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch    max_commit_batch_size_ = command.max_commit_batch_size();
307c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  if (command.has_set_sync_long_poll_interval()) {
308c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch    session->delegate()->OnReceivedLongPollIntervalUpdate(
309c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        TimeDelta::FromSeconds(command.set_sync_long_poll_interval()));
310c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  }
311c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  if (command.has_set_sync_poll_interval()) {
312c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch    session->delegate()->OnReceivedShortPollIntervalUpdate(
313c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch        TimeDelta::FromSeconds(command.set_sync_poll_interval()));
314c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  }
315c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch}
316c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
317c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochvoid CopyServerFields(syncable::Entry* src, syncable::MutableEntry* dest) {
318c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  dest->Put(SERVER_NON_UNIQUE_NAME, src->Get(SERVER_NON_UNIQUE_NAME));
319c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  dest->Put(SERVER_PARENT_ID, src->Get(SERVER_PARENT_ID));
320c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  dest->Put(SERVER_MTIME, src->Get(SERVER_MTIME));
321c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  dest->Put(SERVER_CTIME, src->Get(SERVER_CTIME));
322c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  dest->Put(SERVER_VERSION, src->Get(SERVER_VERSION));
323c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  dest->Put(SERVER_IS_DIR, src->Get(SERVER_IS_DIR));
324c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  dest->Put(SERVER_IS_DEL, src->Get(SERVER_IS_DEL));
325c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  dest->Put(IS_UNAPPLIED_UPDATE, src->Get(IS_UNAPPLIED_UPDATE));
326c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  dest->Put(SERVER_SPECIFICS, src->Get(SERVER_SPECIFICS));
327c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  dest->Put(SERVER_POSITION_IN_PARENT, src->Get(SERVER_POSITION_IN_PARENT));
328c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch}
329c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
330c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochvoid ClearServerData(syncable::MutableEntry* entry) {
331c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  entry->Put(SERVER_NON_UNIQUE_NAME, "");
332c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  entry->Put(SERVER_PARENT_ID, syncable::kNullId);
333c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  entry->Put(SERVER_MTIME, 0);
334c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  entry->Put(SERVER_CTIME, 0);
335c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  entry->Put(SERVER_VERSION, 0);
336c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  entry->Put(SERVER_IS_DIR, false);
337c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  entry->Put(SERVER_IS_DEL, false);
338c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  entry->Put(IS_UNAPPLIED_UPDATE, false);
339c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  entry->Put(SERVER_SPECIFICS, sync_pb::EntitySpecifics::default_instance());
340c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch  entry->Put(SERVER_POSITION_IN_PARENT, 0);
341c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch}
342c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch
343c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch}  // namespace browser_sync
344