cef/libcef/browser_database_system.cc

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// Copyright (c) 2011 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 "libcef/browser_database_system.h"
#include "base/auto_reset.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/file_util.h"
#include "base/message_loop.h"
#include "base/message_loop_proxy.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/platform_thread.h"
#include "base/utf_string_conversions.h"
#include "third_party/sqlite/sqlite3.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDatabase.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebString.h"
#include "webkit/database/database_util.h"
#include "webkit/database/vfs_backend.h"
using webkit_database::DatabaseTracker;
using webkit_database::DatabaseUtil;
using webkit_database::OriginInfo;
using webkit_database::VfsBackend;
BrowserDatabaseSystem* BrowserDatabaseSystem::instance_ = NULL;
BrowserDatabaseSystem* BrowserDatabaseSystem::GetInstance() {
DCHECK(instance_);
return instance_;
}
BrowserDatabaseSystem::BrowserDatabaseSystem()
: db_thread_("BrowserDBThread"),
quota_per_origin_(5 * 1024 * 1024),
open_connections_(new webkit_database::DatabaseConnectionsWrapper) {
DCHECK(!instance_);
instance_ = this;
CHECK(temp_dir_.CreateUniqueTempDir());
db_tracker_ =
new DatabaseTracker(temp_dir_.path(), false, false, NULL, NULL, NULL);
db_tracker_->AddObserver(this);
db_thread_.Start();
db_thread_proxy_ = db_thread_.message_loop_proxy();
}
BrowserDatabaseSystem::~BrowserDatabaseSystem() {
base::WaitableEvent done_event(false, false);
db_thread_proxy_->PostTask(
FROM_HERE,
base::Bind(&BrowserDatabaseSystem::ThreadCleanup,
base::Unretained(this), &done_event));
done_event.Wait();
instance_ = NULL;
}
void BrowserDatabaseSystem::databaseOpened(
const WebKit::WebDatabase& database) {
string16 origin_identifier = database.securityOrigin().databaseIdentifier();
string16 database_name = database.name();
open_connections_->AddOpenConnection(origin_identifier, database_name);
db_thread_proxy_->PostTask(
FROM_HERE,
base::Bind(&BrowserDatabaseSystem::DatabaseOpened,
base::Unretained(this),
origin_identifier,
database_name, database.displayName(),
database.estimatedSize()));
}
void BrowserDatabaseSystem::databaseModified(
const WebKit::WebDatabase& database) {
db_thread_proxy_->PostTask(
FROM_HERE,
base::Bind(&BrowserDatabaseSystem::DatabaseModified,
base::Unretained(this),
database.securityOrigin().databaseIdentifier(),
database.name()));
}
void BrowserDatabaseSystem::databaseClosed(
const WebKit::WebDatabase& database) {
string16 origin_identifier = database.securityOrigin().databaseIdentifier();
string16 database_name = database.name();
db_thread_proxy_->PostTask(
FROM_HERE,
base::Bind(&BrowserDatabaseSystem::DatabaseClosed,
base::Unretained(this), origin_identifier, database_name));
}
base::PlatformFile BrowserDatabaseSystem::OpenFile(
const string16& vfs_file_name, int desired_flags) {
base::PlatformFile result = base::kInvalidPlatformFileValue;
base::WaitableEvent done_event(false, false);
db_thread_proxy_->PostTask(
FROM_HERE,
base::Bind(&BrowserDatabaseSystem::VfsOpenFile,
base::Unretained(this),
vfs_file_name, desired_flags,
&result, &done_event));
done_event.Wait();
return result;
}
int BrowserDatabaseSystem::DeleteFile(
const string16& vfs_file_name, bool sync_dir) {
int result = SQLITE_OK;
base::WaitableEvent done_event(false, false);
db_thread_proxy_->PostTask(
FROM_HERE,
base::Bind(&BrowserDatabaseSystem::VfsDeleteFile,
base::Unretained(this),
vfs_file_name, sync_dir,
&result, &done_event));
done_event.Wait();
return result;
}
uint32 BrowserDatabaseSystem::GetFileAttributes(const string16& vfs_file_name) {
uint32 result = 0;
base::WaitableEvent done_event(false, false);
db_thread_proxy_->PostTask(
FROM_HERE,
base::Bind(&BrowserDatabaseSystem::VfsGetFileAttributes,
base::Unretained(this), vfs_file_name, &result, &done_event));
done_event.Wait();
return result;
}
int64 BrowserDatabaseSystem::GetFileSize(const string16& vfs_file_name) {
int64 result = 0;
base::WaitableEvent done_event(false, false);
db_thread_proxy_->PostTask(
FROM_HERE,
base::Bind(&BrowserDatabaseSystem::VfsGetFileSize,
base::Unretained(this), vfs_file_name, &result, &done_event));
done_event.Wait();
return result;
}
int64 BrowserDatabaseSystem::GetSpaceAvailable(
const string16& origin_identifier) {
int64 result = 0;
base::WaitableEvent done_event(false, false);
db_thread_proxy_->PostTask(
FROM_HERE,
base::Bind(&BrowserDatabaseSystem::VfsGetSpaceAvailable,
base::Unretained(this), origin_identifier,
&result, &done_event));
done_event.Wait();
return result;
}
void BrowserDatabaseSystem::ClearAllDatabases() {
open_connections_->WaitForAllDatabasesToClose();
db_thread_proxy_->PostTask(
FROM_HERE,
base::Bind(&BrowserDatabaseSystem::ResetTracker, base::Unretained(this)));
}
void BrowserDatabaseSystem::SetDatabaseQuota(int64 quota) {
if (!db_thread_proxy_->BelongsToCurrentThread()) {
db_thread_proxy_->PostTask(
FROM_HERE,
base::Bind(&BrowserDatabaseSystem::SetDatabaseQuota,
base::Unretained(this), quota));
return;
}
quota_per_origin_ = quota;
}
void BrowserDatabaseSystem::DatabaseOpened(const string16& origin_identifier,
const string16& database_name,
const string16& description,
int64 estimated_size) {
DCHECK(db_thread_proxy_->BelongsToCurrentThread());
int64 database_size = 0;
db_tracker_->DatabaseOpened(
origin_identifier, database_name, description,
estimated_size, &database_size);
OnDatabaseSizeChanged(origin_identifier, database_name,
database_size);
}
void BrowserDatabaseSystem::DatabaseModified(const string16& origin_identifier,
const string16& database_name) {
DCHECK(db_thread_proxy_->BelongsToCurrentThread());
db_tracker_->DatabaseModified(origin_identifier, database_name);
}
void BrowserDatabaseSystem::DatabaseClosed(const string16& origin_identifier,
const string16& database_name) {
DCHECK(db_thread_proxy_->BelongsToCurrentThread());
db_tracker_->DatabaseClosed(origin_identifier, database_name);
open_connections_->RemoveOpenConnection(origin_identifier, database_name);
}
void BrowserDatabaseSystem::OnDatabaseSizeChanged(
const string16& origin_identifier,
const string16& database_name,
int64 database_size) {
DCHECK(db_thread_proxy_->BelongsToCurrentThread());
// We intentionally call into webkit on our background db_thread_
// to better emulate what happens in chrome where this method is
// invoked on the background ipc thread.
WebKit::WebDatabase::updateDatabaseSize(
origin_identifier, database_name, database_size);
}
void BrowserDatabaseSystem::OnDatabaseScheduledForDeletion(
const string16& origin_identifier,
const string16& database_name) {
DCHECK(db_thread_proxy_->BelongsToCurrentThread());
// We intentionally call into webkit on our background db_thread_
// to better emulate what happens in chrome where this method is
// invoked on the background ipc thread.
WebKit::WebDatabase::closeDatabaseImmediately(
origin_identifier, database_name);
}
void BrowserDatabaseSystem::VfsOpenFile(
const string16& vfs_file_name, int desired_flags,
base::PlatformFile* file_handle, base::WaitableEvent* done_event ) {
DCHECK(db_thread_proxy_->BelongsToCurrentThread());
FilePath file_name = GetFullFilePathForVfsFile(vfs_file_name);
if (file_name.empty()) {
VfsBackend::OpenTempFileInDirectory(
db_tracker_->DatabaseDirectory(), desired_flags, file_handle);
} else {
VfsBackend::OpenFile(file_name, desired_flags, file_handle);
}
done_event->Signal();
}
void BrowserDatabaseSystem::VfsDeleteFile(
const string16& vfs_file_name, bool sync_dir,
int* result, base::WaitableEvent* done_event) {
DCHECK(db_thread_proxy_->BelongsToCurrentThread());
// 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;
*result = SQLITE_OK;
FilePath file_name = GetFullFilePathForVfsFile(vfs_file_name);
do {
*result = VfsBackend::DeleteFile(file_name, sync_dir);
} while ((++num_retries < kNumDeleteRetries) &&
(*result == SQLITE_IOERR_DELETE) &&
(base::PlatformThread::Sleep(
base::TimeDelta::FromMilliseconds(10)),
1));
done_event->Signal();
}
void BrowserDatabaseSystem::VfsGetFileAttributes(
const string16& vfs_file_name,
uint32* result, base::WaitableEvent* done_event) {
DCHECK(db_thread_proxy_->BelongsToCurrentThread());
*result = VfsBackend::GetFileAttributes(
GetFullFilePathForVfsFile(vfs_file_name));
done_event->Signal();
}
void BrowserDatabaseSystem::VfsGetFileSize(
const string16& vfs_file_name,
int64* result, base::WaitableEvent* done_event) {
DCHECK(db_thread_proxy_->BelongsToCurrentThread());
*result = VfsBackend::GetFileSize(GetFullFilePathForVfsFile(vfs_file_name));
done_event->Signal();
}
void BrowserDatabaseSystem::VfsGetSpaceAvailable(
const string16& origin_identifier,
int64* result, base::WaitableEvent* done_event) {
DCHECK(db_thread_proxy_->BelongsToCurrentThread());
// This method isn't actually part of the "vfs" interface, but it is
// used from within webcore and handled here in the same fashion.
OriginInfo info;
if (db_tracker_->GetOriginInfo(origin_identifier, &info)) {
int64 space_available = quota_per_origin_ - info.TotalSize();
*result = space_available < 0 ? 0 : space_available;
} else {
NOTREACHED();
*result = 0;
}
done_event->Signal();
}
FilePath BrowserDatabaseSystem::GetFullFilePathForVfsFile(
const string16& vfs_file_name) {
DCHECK(db_thread_proxy_->BelongsToCurrentThread());
if (vfs_file_name.empty()) // temp file, used for vacuuming
return FilePath();
return DatabaseUtil::GetFullFilePathForVfsFile(
db_tracker_.get(), vfs_file_name);
}
void BrowserDatabaseSystem::ResetTracker() {
DCHECK(db_thread_proxy_->BelongsToCurrentThread());
db_tracker_->CloseTrackerDatabaseAndClearCaches();
file_util::Delete(db_tracker_->DatabaseDirectory(), true);
}
void BrowserDatabaseSystem::ThreadCleanup(base::WaitableEvent* done_event) {
ResetTracker();
db_tracker_->RemoveObserver(this);
db_tracker_ = NULL;
done_event->Signal();
}