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// 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 "chrome/browser/sync/glue/shared_change_processor.h"
#include "chrome/browser/sync/glue/generic_change_processor.h"
#include "chrome/browser/sync/profile_sync_components_factory.h"
#include "chrome/browser/sync/profile_sync_service.h"
#include "content/public/browser/browser_thread.h"
#include "sync/api/sync_change.h"
using base::AutoLock;
using content::BrowserThread;
namespace browser_sync {
SharedChangeProcessor::SharedChangeProcessor()
: disconnected_(false),
type_(syncer::UNSPECIFIED),
sync_service_(NULL),
generic_change_processor_(NULL),
error_handler_(NULL) {
// We're always created on the UI thread.
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
}
SharedChangeProcessor::~SharedChangeProcessor() {
// We can either be deleted when the DTC is destroyed (on UI
// thread), or when the syncer::SyncableService stop's syncing (datatype
// thread). |generic_change_processor_|, if non-NULL, must be
// deleted on |backend_loop_|.
if (BrowserThread::CurrentlyOn(BrowserThread::UI)) {
if (backend_loop_.get()) {
if (!backend_loop_->DeleteSoon(FROM_HERE, generic_change_processor_)) {
NOTREACHED();
}
} else {
DCHECK(!generic_change_processor_);
}
} else {
DCHECK(backend_loop_.get());
DCHECK(backend_loop_->BelongsToCurrentThread());
delete generic_change_processor_;
}
}
base::WeakPtr<syncer::SyncableService> SharedChangeProcessor::Connect(
ProfileSyncComponentsFactory* sync_factory,
ProfileSyncService* sync_service,
DataTypeErrorHandler* error_handler,
syncer::ModelType type) {
DCHECK(sync_factory);
DCHECK(sync_service);
DCHECK(error_handler);
DCHECK_NE(type, syncer::UNSPECIFIED);
backend_loop_ = base::MessageLoopProxy::current();
AutoLock lock(monitor_lock_);
if (disconnected_)
return base::WeakPtr<syncer::SyncableService>();
type_ = type;
sync_service_ = sync_service;
error_handler_ = error_handler;
base::WeakPtr<syncer::SyncableService> local_service =
sync_factory->GetSyncableServiceForType(type);
if (!local_service.get()) {
NOTREACHED() << "SyncableService destroyed before DTC was stopped.";
disconnected_ = true;
return base::WeakPtr<syncer::SyncableService>();
}
generic_change_processor_ =
sync_factory->CreateGenericChangeProcessor(sync_service_,
error_handler,
local_service);
return local_service;
}
bool SharedChangeProcessor::Disconnect() {
// May be called from any thread.
DVLOG(1) << "Disconnecting change processor.";
AutoLock lock(monitor_lock_);
bool was_connected = !disconnected_;
disconnected_ = true;
error_handler_ = NULL;
return was_connected;
}
syncer::SyncError SharedChangeProcessor::GetSyncData(
syncer::SyncDataList* current_sync_data) {
DCHECK(backend_loop_.get());
DCHECK(backend_loop_->BelongsToCurrentThread());
AutoLock lock(monitor_lock_);
if (disconnected_) {
syncer::SyncError error(FROM_HERE, "Change processor disconnected.", type_);
return error;
}
return generic_change_processor_->GetSyncDataForType(type_,
current_sync_data);
}
syncer::SyncError SharedChangeProcessor::ProcessSyncChanges(
const tracked_objects::Location& from_here,
const syncer::SyncChangeList& list_of_changes) {
DCHECK(backend_loop_.get());
DCHECK(backend_loop_->BelongsToCurrentThread());
AutoLock lock(monitor_lock_);
if (disconnected_) {
// The DTC that disconnects us must ensure it posts a StopSyncing task.
// If we reach this, it means it just hasn't executed yet.
syncer::SyncError error(FROM_HERE, "Change processor disconnected.", type_);
return error;
}
return generic_change_processor_->ProcessSyncChanges(
from_here, list_of_changes);
}
bool SharedChangeProcessor::SyncModelHasUserCreatedNodes(bool* has_nodes) {
DCHECK(backend_loop_.get());
DCHECK(backend_loop_->BelongsToCurrentThread());
AutoLock lock(monitor_lock_);
if (disconnected_) {
LOG(ERROR) << "Change processor disconnected.";
return false;
}
return generic_change_processor_->SyncModelHasUserCreatedNodes(
type_, has_nodes);
}
bool SharedChangeProcessor::CryptoReadyIfNecessary() {
DCHECK(backend_loop_.get());
DCHECK(backend_loop_->BelongsToCurrentThread());
AutoLock lock(monitor_lock_);
if (disconnected_) {
LOG(ERROR) << "Change processor disconnected.";
return true; // Otherwise we get into infinite spin waiting.
}
return generic_change_processor_->CryptoReadyIfNecessary(type_);
}
void SharedChangeProcessor::ActivateDataType(
syncer::ModelSafeGroup model_safe_group) {
DCHECK(backend_loop_.get());
DCHECK(backend_loop_->BelongsToCurrentThread());
AutoLock lock(monitor_lock_);
if (disconnected_) {
LOG(ERROR) << "Change processor disconnected.";
return;
}
sync_service_->ActivateDataType(type_,
model_safe_group,
generic_change_processor_);
}
syncer::SyncError SharedChangeProcessor::CreateAndUploadError(
const tracked_objects::Location& location,
const std::string& message) {
AutoLock lock(monitor_lock_);
if (!disconnected_) {
return error_handler_->CreateAndUploadError(location, message, type_);
} else {
return syncer::SyncError(location, message, type_);
}
}
} // namespace browser_sync
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