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// Copyright (c) 2009 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 "webkit/tools/test_shell/simple_database_system.h"
#if defined(USE_SYSTEM_SQLITE)
#include <sqlite3.h>
#else
#include "third_party/sqlite/preprocessed/sqlite3.h"
#endif
#include "base/file_util.h"
#include "base/platform_thread.h"
#include "base/process_util.h"
#include "webkit/database/vfs_backend.h"
#include "webkit/glue/webkit_glue.h"
using webkit_database::VfsBackend;
SimpleDatabaseSystem* SimpleDatabaseSystem::instance_ = NULL;
SimpleDatabaseSystem* SimpleDatabaseSystem::GetInstance() {
DCHECK(instance_);
return instance_;
}
SimpleDatabaseSystem::SimpleDatabaseSystem()
: hack_main_db_handle_(base::kInvalidPlatformFileValue) {
temp_dir_.CreateUniqueTempDir();
DCHECK(!instance_);
instance_ = this;
}
SimpleDatabaseSystem::~SimpleDatabaseSystem() {
base::ClosePlatformFile(hack_main_db_handle_);
instance_ = NULL;
}
base::PlatformFile SimpleDatabaseSystem::OpenFile(
const FilePath& file_name, int desired_flags,
base::PlatformFile* dir_handle) {
base::PlatformFile file_handle = base::kInvalidPlatformFileValue;
VfsBackend::OpenFile(GetDBFileFullPath(file_name), GetDBDir(), desired_flags,
base::GetCurrentProcessHandle(), &file_handle,
dir_handle);
// HACK: Currently, the DB object that keeps track of the main database
// (DatabaseTracker) is a singleton that is declared as a static variable
// in a function, so it gets destroyed at the very end of the program.
// Because of that, we have a handle opened to the main DB file until the
// very end of the program, which prevents temp_dir_'s destructor from
// deleting the database directory.
//
// We will properly solve this problem when we reimplement DatabaseTracker.
// For now, however, we are going to take advantage of the fact that in order
// to do anything related to DBs, we have to call openDatabase() first, which
// opens a handle to the main DB before opening handles to any other DB files.
// We are going to cache the first file handle we get, and we are going to
// manually close it in the destructor.
if (hack_main_db_handle_ == base::kInvalidPlatformFileValue) {
hack_main_db_handle_ = file_handle;
}
return file_handle;
}
int SimpleDatabaseSystem::DeleteFile(
const FilePath& file_name, bool sync_dir) {
// We try to delete the file multiple times, because that's what the default
// VFS does (apparently deleting a file can sometimes fail on Windows).
// We sleep for 10ms between retries for the same reason.
const int kNumDeleteRetries = 3;
int num_retries = 0;
int error_code = SQLITE_OK;
do {
error_code = VfsBackend::DeleteFile(
GetDBFileFullPath(file_name), GetDBDir(), sync_dir);
} while ((++num_retries < kNumDeleteRetries) &&
(error_code == SQLITE_IOERR_DELETE) &&
(PlatformThread::Sleep(10), 1));
return error_code;
}
long SimpleDatabaseSystem::GetFileAttributes(
const FilePath& file_name) {
return VfsBackend::GetFileAttributes(GetDBFileFullPath(file_name));
}
long long SimpleDatabaseSystem::GetFileSize(
const FilePath& file_name) {
return VfsBackend::GetFileSize(GetDBFileFullPath(file_name));
}
void SimpleDatabaseSystem::ClearAllDatabases() {
// TODO(dumi): implement this once we refactor DatabaseTracker
//file_util::Delete(GetDBDir(), true);
}
FilePath SimpleDatabaseSystem::GetDBDir() {
return temp_dir_.path().Append(FILE_PATH_LITERAL("databases"));
}
FilePath SimpleDatabaseSystem::GetDBFileFullPath(const FilePath& file_name) {
return GetDBDir().Append(file_name);
}
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