gecko-dev/dom/indexedDB/FileManager.cpp

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7.8 KiB
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Indexed Database.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "FileManager.h"
#include "mozIStorageConnection.h"
#include "mozIStorageServiceQuotaManagement.h"
#include "mozIStorageStatement.h"
#include "nsISimpleEnumerator.h"
#include "mozStorageCID.h"
#include "mozStorageHelper.h"
#include "nsContentUtils.h"
#include "FileInfo.h"
#include "IndexedDatabaseManager.h"
USING_INDEXEDDB_NAMESPACE
namespace {
PLDHashOperator
EnumerateToTArray(const PRUint64& aKey,
FileInfo* aValue,
void* aUserArg)
{
NS_ASSERTION(aValue, "Null pointer!");
NS_ASSERTION(aUserArg, "Null pointer!");
nsTArray<FileInfo*>* array =
static_cast<nsTArray<FileInfo*>*>(aUserArg);
array->AppendElement(aValue);
return PL_DHASH_NEXT;
}
} // anonymous namespace
nsresult
FileManager::Init(nsIFile* aDirectory,
mozIStorageConnection* aConnection)
{
NS_ASSERTION(!NS_IsMainThread(), "Wrong thread!");
NS_ENSURE_TRUE(mFileInfos.Init(), NS_ERROR_OUT_OF_MEMORY);
bool exists;
nsresult rv = aDirectory->Exists(&exists);
NS_ENSURE_SUCCESS(rv, rv);
if (exists) {
bool isDirectory;
rv = aDirectory->IsDirectory(&isDirectory);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(isDirectory, NS_ERROR_FAILURE);
}
else {
rv = aDirectory->Create(nsIFile::DIRECTORY_TYPE, 0755);
NS_ENSURE_SUCCESS(rv, rv);
}
mozStorageTransaction transaction(aConnection, false);
rv = aConnection->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
"CREATE VIRTUAL TABLE fs USING filesystem;"
));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<mozIStorageStatement> stmt;
rv = aConnection->CreateStatement(NS_LITERAL_CSTRING(
"SELECT name, (name IN (SELECT id FROM file)) FROM fs "
"WHERE path = :path"
), getter_AddRefs(stmt));
NS_ENSURE_SUCCESS(rv, rv);
nsString path;
rv = aDirectory->GetPath(path);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->BindStringByName(NS_LITERAL_CSTRING("path"), path);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<mozIStorageServiceQuotaManagement> ss =
do_GetService(MOZ_STORAGE_SERVICE_CONTRACTID);
NS_ENSURE_TRUE(ss, NS_ERROR_FAILURE);
bool hasResult;
while (NS_SUCCEEDED(stmt->ExecuteStep(&hasResult)) && hasResult) {
nsString name;
rv = stmt->GetString(0, name);
NS_ENSURE_SUCCESS(rv, rv);
PRInt32 flag = stmt->AsInt32(1);
nsCOMPtr<nsIFile> file;
rv = aDirectory->Clone(getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
rv = file->Append(name);
NS_ENSURE_SUCCESS(rv, rv);
if (flag) {
rv = ss->UpdateQuotaInformationForFile(file);
NS_ENSURE_SUCCESS(rv, rv);
}
else {
rv = file->Remove(false);
if (NS_FAILED(rv)) {
NS_WARNING("Failed to remove orphaned file!");
}
}
}
rv = aConnection->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
"DROP TABLE fs;"
));
NS_ENSURE_SUCCESS(rv, rv);
rv = aDirectory->GetPath(mDirectoryPath);
NS_ENSURE_SUCCESS(rv, rv);
transaction.Commit();
return NS_OK;
}
nsresult
FileManager::Load(mozIStorageConnection* aConnection)
{
NS_ASSERTION(!NS_IsMainThread(), "Wrong thread!");
nsCOMPtr<mozIStorageStatement> stmt;
nsresult rv = aConnection->CreateStatement(NS_LITERAL_CSTRING(
"SELECT id, refcount "
"FROM file"
), getter_AddRefs(stmt));
NS_ENSURE_SUCCESS(rv, rv);
bool hasResult;
while (NS_SUCCEEDED(stmt->ExecuteStep(&hasResult)) && hasResult) {
PRInt64 id;
rv = stmt->GetInt64(0, &id);
NS_ENSURE_SUCCESS(rv, rv);
PRInt32 refcount;
rv = stmt->GetInt32(1, &refcount);
NS_ENSURE_SUCCESS(rv, rv);
NS_ASSERTION(refcount, "This shouldn't happen!");
nsRefPtr<FileInfo> fileInfo = FileInfo::Create(this, id);
fileInfo->mDBRefCnt = refcount;
if (!mFileInfos.Put(id, fileInfo)) {
NS_WARNING("Out of memory?");
return NS_ERROR_OUT_OF_MEMORY;
}
mLastFileId = NS_MAX(id, mLastFileId);
}
mLoaded = true;
return NS_OK;
}
nsresult
FileManager::Invalidate()
{
if (IndexedDatabaseManager::IsClosed()) {
NS_ERROR("Shouldn't be called after shutdown!");
return NS_ERROR_UNEXPECTED;
}
nsTArray<FileInfo*> fileInfos;
{
MutexAutoLock lock(IndexedDatabaseManager::FileMutex());
NS_ASSERTION(!mInvalidated, "Invalidate more than once?!");
mInvalidated = true;
fileInfos.SetCapacity(mFileInfos.Count());
mFileInfos.EnumerateRead(EnumerateToTArray, &fileInfos);
}
for (PRUint32 i = 0; i < fileInfos.Length(); i++) {
FileInfo* fileInfo = fileInfos.ElementAt(i);
fileInfo->ClearDBRefs();
}
return NS_OK;
}
already_AddRefed<nsIFile>
FileManager::GetDirectory()
{
nsCOMPtr<nsILocalFile> directory =
do_CreateInstance(NS_LOCAL_FILE_CONTRACTID);
NS_ENSURE_TRUE(directory, nsnull);
nsresult rv = directory->InitWithPath(mDirectoryPath);
NS_ENSURE_SUCCESS(rv, nsnull);
return directory.forget();
}
already_AddRefed<FileInfo>
FileManager::GetFileInfo(PRInt64 aId)
{
if (IndexedDatabaseManager::IsClosed()) {
NS_ERROR("Shouldn't be called after shutdown!");
return nsnull;
}
FileInfo* fileInfo = nsnull;
{
MutexAutoLock lock(IndexedDatabaseManager::FileMutex());
fileInfo = mFileInfos.Get(aId);
}
nsRefPtr<FileInfo> result = fileInfo;
return result.forget();
}
already_AddRefed<FileInfo>
FileManager::GetNewFileInfo()
{
if (IndexedDatabaseManager::IsClosed()) {
NS_ERROR("Shouldn't be called after shutdown!");
return nsnull;
}
nsAutoPtr<FileInfo> fileInfo;
{
MutexAutoLock lock(IndexedDatabaseManager::FileMutex());
PRInt64 id = mLastFileId + 1;
fileInfo = FileInfo::Create(this, id);
if (!mFileInfos.Put(id, fileInfo)) {
NS_WARNING("Out of memory?");
return nsnull;
}
mLastFileId = id;
}
nsRefPtr<FileInfo> result = fileInfo.forget();
return result.forget();
}
already_AddRefed<nsIFile>
FileManager::GetFileForId(nsIFile* aDirectory, PRInt64 aId)
{
NS_ASSERTION(aDirectory, "Null pointer!");
nsAutoString id;
id.AppendInt(aId);
nsCOMPtr<nsIFile> file;
nsresult rv = aDirectory->Clone(getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, nsnull);
rv = file->Append(id);
NS_ENSURE_SUCCESS(rv, nsnull);
return file.forget();
}