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// 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 "sync/engine/non_blocking_type_processor.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/message_loop/message_loop_proxy.h"
#include "sync/engine/model_thread_sync_entity.h"
#include "sync/engine/non_blocking_type_processor_core_interface.h"
#include "sync/internal_api/public/sync_core_proxy.h"
#include "sync/syncable/syncable_util.h"
namespace syncer {
NonBlockingTypeProcessor::NonBlockingTypeProcessor(ModelType type)
: type_(type),
is_preferred_(false),
is_connected_(false),
entities_deleter_(&entities_),
weak_ptr_factory_for_ui_(this),
weak_ptr_factory_for_sync_(this) {
}
NonBlockingTypeProcessor::~NonBlockingTypeProcessor() {
}
bool NonBlockingTypeProcessor::IsPreferred() const {
DCHECK(CalledOnValidThread());
return is_preferred_;
}
bool NonBlockingTypeProcessor::IsConnected() const {
DCHECK(CalledOnValidThread());
return is_connected_;
}
ModelType NonBlockingTypeProcessor::GetModelType() const {
DCHECK(CalledOnValidThread());
return type_;
}
void NonBlockingTypeProcessor::Enable(
scoped_ptr<SyncCoreProxy> sync_core_proxy) {
DCHECK(CalledOnValidThread());
DVLOG(1) << "Asked to enable " << ModelTypeToString(type_);
is_preferred_ = true;
// TODO(rlarocque): At some point, this should be loaded from storage.
data_type_state_.progress_marker.set_data_type_id(
GetSpecificsFieldNumberFromModelType(type_));
sync_core_proxy_ = sync_core_proxy.Pass();
sync_core_proxy_->ConnectTypeToCore(GetModelType(),
data_type_state_,
weak_ptr_factory_for_sync_.GetWeakPtr());
}
void NonBlockingTypeProcessor::Disable() {
DCHECK(CalledOnValidThread());
is_preferred_ = false;
Disconnect();
}
void NonBlockingTypeProcessor::Disconnect() {
DCHECK(CalledOnValidThread());
DVLOG(1) << "Asked to disconnect " << ModelTypeToString(type_);
is_connected_ = false;
if (sync_core_proxy_) {
sync_core_proxy_->Disconnect(GetModelType());
sync_core_proxy_.reset();
}
weak_ptr_factory_for_sync_.InvalidateWeakPtrs();
core_interface_.reset();
}
base::WeakPtr<NonBlockingTypeProcessor>
NonBlockingTypeProcessor::AsWeakPtrForUI() {
DCHECK(CalledOnValidThread());
return weak_ptr_factory_for_ui_.GetWeakPtr();
}
void NonBlockingTypeProcessor::OnConnect(
scoped_ptr<NonBlockingTypeProcessorCoreInterface> core_interface) {
DCHECK(CalledOnValidThread());
DVLOG(1) << "Successfully connected " << ModelTypeToString(type_);
is_connected_ = true;
core_interface_ = core_interface.Pass();
FlushPendingCommitRequests();
}
void NonBlockingTypeProcessor::Put(const std::string& client_tag,
const sync_pb::EntitySpecifics& specifics) {
DCHECK_EQ(type_, GetModelTypeFromSpecifics(specifics));
const std::string client_tag_hash(
syncable::GenerateSyncableHash(type_, client_tag));
EntityMap::iterator it = entities_.find(client_tag_hash);
if (it == entities_.end()) {
scoped_ptr<ModelThreadSyncEntity> entity(
ModelThreadSyncEntity::NewLocalItem(
client_tag, specifics, base::Time::Now()));
entities_.insert(std::make_pair(client_tag_hash, entity.release()));
} else {
ModelThreadSyncEntity* entity = it->second;
entity->MakeLocalChange(specifics);
}
FlushPendingCommitRequests();
}
void NonBlockingTypeProcessor::Delete(const std::string& client_tag) {
const std::string client_tag_hash(
syncable::GenerateSyncableHash(type_, client_tag));
EntityMap::iterator it = entities_.find(client_tag_hash);
if (it == entities_.end()) {
// That's unusual, but not necessarily a bad thing.
// Missing is as good as deleted as far as the model is concerned.
DLOG(WARNING) << "Attempted to delete missing item."
<< " client tag: " << client_tag;
} else {
ModelThreadSyncEntity* entity = it->second;
entity->Delete();
}
FlushPendingCommitRequests();
}
void NonBlockingTypeProcessor::FlushPendingCommitRequests() {
CommitRequestDataList commit_requests;
// Don't bother sending anything if there's no one to send to.
if (!IsConnected())
return;
// Don't send anything if the type is not ready to handle commits.
if (!data_type_state_.initial_sync_done)
return;
// TODO(rlarocque): Do something smarter than iterate here.
for (EntityMap::iterator it = entities_.begin(); it != entities_.end();
++it) {
if (it->second->RequiresCommitRequest()) {
CommitRequestData request;
it->second->InitializeCommitRequestData(&request);
commit_requests.push_back(request);
it->second->SetCommitRequestInProgress();
}
}
if (!commit_requests.empty())
core_interface_->RequestCommits(commit_requests);
}
void NonBlockingTypeProcessor::OnCommitCompletion(
const DataTypeState& type_state,
const CommitResponseDataList& response_list) {
data_type_state_ = type_state;
for (CommitResponseDataList::const_iterator list_it = response_list.begin();
list_it != response_list.end();
++list_it) {
const CommitResponseData& response_data = *list_it;
const std::string& client_tag_hash = response_data.client_tag_hash;
EntityMap::iterator it = entities_.find(client_tag_hash);
if (it == entities_.end()) {
NOTREACHED() << "Received commit response for missing item."
<< " type: " << type_ << " client_tag: " << client_tag_hash;
return;
} else {
it->second->ReceiveCommitResponse(response_data.id,
response_data.sequence_number,
response_data.response_version);
}
}
}
void NonBlockingTypeProcessor::OnUpdateReceived(
const DataTypeState& data_type_state,
const UpdateResponseDataList& response_list) {
bool initial_sync_just_finished =
!data_type_state_.initial_sync_done && data_type_state.initial_sync_done;
data_type_state_ = data_type_state;
for (UpdateResponseDataList::const_iterator list_it = response_list.begin();
list_it != response_list.end();
++list_it) {
const UpdateResponseData& response_data = *list_it;
const std::string& client_tag_hash = response_data.client_tag_hash;
EntityMap::iterator it = entities_.find(client_tag_hash);
if (it == entities_.end()) {
scoped_ptr<ModelThreadSyncEntity> entity =
ModelThreadSyncEntity::FromServerUpdate(
response_data.id,
response_data.client_tag_hash,
response_data.non_unique_name,
response_data.response_version,
response_data.specifics,
response_data.deleted,
response_data.ctime,
response_data.mtime);
entities_.insert(std::make_pair(client_tag_hash, entity.release()));
} else {
ModelThreadSyncEntity* entity = it->second;
entity->ApplyUpdateFromServer(response_data.response_version,
response_data.deleted,
response_data.specifics,
response_data.mtime);
// TODO: Do something special when conflicts are detected.
}
}
if (initial_sync_just_finished)
FlushPendingCommitRequests();
// TODO: Inform the model of the new or updated data.
}
} // namespace syncer
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