gecko/dom/indexedDB/FileManager.cpp
2012-07-30 17:20:58 +03:00

266 lines
6.1 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "FileManager.h"
#include "mozIStorageConnection.h"
#include "mozIStorageServiceQuotaManagement.h"
#include "mozIStorageStatement.h"
#include "nsISimpleEnumerator.h"
#include "mozStorageCID.h"
#include "mozStorageHelper.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!");
mFileInfos.Init();
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;
mFileInfos.Put(id, fileInfo);
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<nsIFile> directory =
do_CreateInstance(NS_LOCAL_FILE_CONTRACTID);
NS_ENSURE_TRUE(directory, nullptr);
nsresult rv = directory->InitWithPath(mDirectoryPath);
NS_ENSURE_SUCCESS(rv, nullptr);
return directory.forget();
}
already_AddRefed<FileInfo>
FileManager::GetFileInfo(PRInt64 aId)
{
if (IndexedDatabaseManager::IsClosed()) {
NS_ERROR("Shouldn't be called after shutdown!");
return nullptr;
}
FileInfo* fileInfo = nullptr;
{
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 nullptr;
}
nsAutoPtr<FileInfo> fileInfo;
{
MutexAutoLock lock(IndexedDatabaseManager::FileMutex());
PRInt64 id = mLastFileId + 1;
fileInfo = FileInfo::Create(this, id);
mFileInfos.Put(id, fileInfo);
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, nullptr);
rv = file->Append(id);
NS_ENSURE_SUCCESS(rv, nullptr);
return file.forget();
}