Rename WebDataServiceBackend to WebDatabaseBackend

components/webdata/common/web_data_service_backend.cc

-// Copyright 2013 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/webdata/common/web_data_service_backend.h"
-
-#include "base/bind.h"
-#include "base/location.h"
-#include "components/webdata/common/web_data_request_manager.h"
-#include "components/webdata/common/web_database.h"
-#include "components/webdata/common/web_database_table.h"
-
-using base::Bind;
-using base::FilePath;
-
-WebDataServiceBackend::WebDataServiceBackend(
-    const FilePath& path,
-    Delegate* delegate,
-    const scoped_refptr<base::MessageLoopProxy>& db_thread)
-    : base::RefCountedDeleteOnMessageLoop<WebDataServiceBackend>(db_thread),
-      db_path_(path),
-      request_manager_(new WebDataRequestManager()),
-      init_status_(sql::INIT_FAILURE),
-      init_complete_(false),
-      delegate_(delegate) {
-}
-
-void WebDataServiceBackend::AddTable(scoped_ptr<WebDatabaseTable> table) {
-  DCHECK(!db_.get());
-  tables_.push_back(table.release());
-}
-
-void WebDataServiceBackend::InitDatabase() {
-  LoadDatabaseIfNecessary();
-  if (delegate_) {
-    delegate_->DBLoaded(init_status_);
-  }
-}
-
-sql::InitStatus WebDataServiceBackend::LoadDatabaseIfNecessary() {
-  if (init_complete_ || db_path_.empty()) {
-    return init_status_;
-  }
-  init_complete_ = true;
-  db_.reset(new WebDatabase());
-
-  for (ScopedVector<WebDatabaseTable>::iterator it = tables_.begin();
-       it != tables_.end(); ++it) {
-    db_->AddTable(*it);
-  }
-
-  init_status_ = db_->Init(db_path_);
-  if (init_status_ != sql::INIT_OK) {
-    LOG(ERROR) << "Cannot initialize the web database: " << init_status_;
-    db_.reset(NULL);
-    return init_status_;
-  }
-
-  db_->BeginTransaction();
-  return init_status_;
-}
-
-void WebDataServiceBackend::ShutdownDatabase() {
-  if (db_ && init_status_ == sql::INIT_OK)
-    db_->CommitTransaction();
-  db_.reset(NULL);
-  init_complete_ = true;  // Ensures the init sequence is not re-run.
-  init_status_ = sql::INIT_FAILURE;
-}
-
-void WebDataServiceBackend::DBWriteTaskWrapper(
-    const WebDatabaseService::WriteTask& task,
-    scoped_ptr<WebDataRequest> request) {
-  if (request->IsCancelled())
-    return;
-
-  ExecuteWriteTask(task);
-  request_manager_->RequestCompleted(request.Pass());
-}
-
-void WebDataServiceBackend::ExecuteWriteTask(
-    const WebDatabaseService::WriteTask& task) {
-  LoadDatabaseIfNecessary();
-  if (db_ && init_status_ == sql::INIT_OK) {
-    WebDatabase::State state = task.Run(db_.get());
-    if (state == WebDatabase::COMMIT_NEEDED)
-      Commit();
-  }
-}
-
-void WebDataServiceBackend::DBReadTaskWrapper(
-    const WebDatabaseService::ReadTask& task,
-    scoped_ptr<WebDataRequest> request) {
-  if (request->IsCancelled())
-    return;
-
-  request->SetResult(ExecuteReadTask(task).Pass());
-  request_manager_->RequestCompleted(request.Pass());
-}
-
-scoped_ptr<WDTypedResult> WebDataServiceBackend::ExecuteReadTask(
-    const WebDatabaseService::ReadTask& task) {
-  LoadDatabaseIfNecessary();
-  if (db_ && init_status_ == sql::INIT_OK) {
-    return task.Run(db_.get());
-  }
-  return scoped_ptr<WDTypedResult>();
-}
-
-WebDataServiceBackend::~WebDataServiceBackend() {
-  ShutdownDatabase();
-}
-
-void WebDataServiceBackend::Commit() {
-  DCHECK(db_);
-  DCHECK_EQ(sql::INIT_OK, init_status_);
-  db_->CommitTransaction();
-  db_->BeginTransaction();
-}