pjs/dom/indexedDB/IDBTransaction.cpp

1032 строки
28 KiB
C++

/* -*- 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) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Ben Turner <bent.mozilla@gmail.com>
*
* 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 "IDBTransaction.h"
#include "nsIAppShell.h"
#include "nsIScriptContext.h"
#include "mozilla/storage.h"
#include "nsContentUtils.h"
#include "nsDOMClassInfoID.h"
#include "nsDOMLists.h"
#include "nsEventDispatcher.h"
#include "nsPIDOMWindow.h"
#include "nsProxyRelease.h"
#include "nsThreadUtils.h"
#include "nsWidgetsCID.h"
#include "AsyncConnectionHelper.h"
#include "DatabaseInfo.h"
#include "IDBCursor.h"
#include "IDBEvents.h"
#include "IDBFactory.h"
#include "IDBObjectStore.h"
#include "IndexedDatabaseManager.h"
#include "TransactionThreadPool.h"
#define SAVEPOINT_NAME "savepoint"
USING_INDEXEDDB_NAMESPACE
namespace {
NS_DEFINE_CID(kAppShellCID, NS_APPSHELL_CID);
PLDHashOperator
DoomCachedStatements(const nsACString& aQuery,
nsCOMPtr<mozIStorageStatement>& aStatement,
void* aUserArg)
{
CommitHelper* helper = static_cast<CommitHelper*>(aUserArg);
helper->AddDoomedObject(aStatement);
return PL_DHASH_REMOVE;
}
// This runnable doesn't actually do anything beyond "prime the pump" and get
// transactions in the right order on the transaction thread pool.
class StartTransactionRunnable : public nsIRunnable
{
public:
NS_DECL_ISUPPORTS
NS_IMETHOD Run()
{
// NOP
return NS_OK;
}
};
// Could really use those NS_REFCOUNTING_HAHA_YEAH_RIGHT macros here.
NS_IMETHODIMP_(nsrefcnt) StartTransactionRunnable::AddRef()
{
return 2;
}
NS_IMETHODIMP_(nsrefcnt) StartTransactionRunnable::Release()
{
return 1;
}
NS_IMPL_QUERY_INTERFACE1(StartTransactionRunnable, nsIRunnable)
StartTransactionRunnable gStartTransactionRunnable;
} // anonymous namespace
// static
already_AddRefed<IDBTransaction>
IDBTransaction::Create(IDBDatabase* aDatabase,
nsTArray<nsString>& aObjectStoreNames,
Mode aMode,
bool aDispatchDelayed)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsRefPtr<IDBTransaction> transaction = new IDBTransaction();
transaction->BindToOwner(aDatabase);
if (!transaction->SetScriptOwner(aDatabase->GetScriptOwner())) {
return nsnull;
}
transaction->mDatabase = aDatabase;
transaction->mMode = aMode;
transaction->mDatabaseInfo = aDatabase->Info();
if (!transaction->mObjectStoreNames.AppendElements(aObjectStoreNames)) {
NS_ERROR("Out of memory!");
return nsnull;
}
if (!transaction->mCachedStatements.Init()) {
NS_ERROR("Failed to initialize hash!");
return nsnull;
}
if (!aDispatchDelayed) {
nsCOMPtr<nsIAppShell> appShell = do_GetService(kAppShellCID);
NS_ENSURE_TRUE(appShell, nsnull);
nsresult rv = appShell->RunBeforeNextEvent(transaction);
NS_ENSURE_SUCCESS(rv, nsnull);
transaction->mCreating = true;
}
if (aMode != IDBTransaction::VERSION_CHANGE) {
TransactionThreadPool* pool = TransactionThreadPool::GetOrCreate();
pool->Dispatch(transaction, &gStartTransactionRunnable, false, nsnull);
}
return transaction.forget();
}
IDBTransaction::IDBTransaction()
: mReadyState(IDBTransaction::INITIAL),
mMode(IDBTransaction::READ_ONLY),
mPendingRequests(0),
mSavepointCount(0),
mAborted(false),
mCreating(false)
#ifdef DEBUG
, mFiredCompleteOrAbort(false)
#endif
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
}
IDBTransaction::~IDBTransaction()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(!mPendingRequests, "Should have no pending requests here!");
NS_ASSERTION(!mSavepointCount, "Should have released them all!");
NS_ASSERTION(!mConnection, "Should have called CommitOrRollback!");
NS_ASSERTION(!mCreating, "Should have been cleared already!");
NS_ASSERTION(mFiredCompleteOrAbort, "Should have fired event!");
nsContentUtils::ReleaseWrapper(static_cast<nsIDOMEventTarget*>(this), this);
}
void
IDBTransaction::OnNewRequest()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (!mPendingRequests) {
NS_ASSERTION(mReadyState == IDBTransaction::INITIAL,
"Reusing a transaction!");
mReadyState = IDBTransaction::LOADING;
}
++mPendingRequests;
}
void
IDBTransaction::OnRequestFinished()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(mPendingRequests, "Mismatched calls!");
--mPendingRequests;
if (!mPendingRequests) {
NS_ASSERTION(mAborted || mReadyState == IDBTransaction::LOADING,
"Bad state!");
mReadyState = IDBTransaction::COMMITTING;
CommitOrRollback();
}
}
void
IDBTransaction::RemoveObjectStore(const nsAString& aName)
{
NS_ASSERTION(mMode == IDBTransaction::VERSION_CHANGE,
"Only remove object stores on VERSION_CHANGE transactions");
mDatabaseInfo->RemoveObjectStore(aName);
for (PRUint32 i = 0; i < mCreatedObjectStores.Length(); i++) {
if (mCreatedObjectStores[i]->Name() == aName) {
mCreatedObjectStores.RemoveElementAt(i);
break;
}
}
}
void
IDBTransaction::SetTransactionListener(IDBTransactionListener* aListener)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(!mListener, "Shouldn't already have a listener!");
mListener = aListener;
}
nsresult
IDBTransaction::CommitOrRollback()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
TransactionThreadPool* pool = TransactionThreadPool::GetOrCreate();
NS_ENSURE_STATE(pool);
nsRefPtr<CommitHelper> helper(new CommitHelper(this, mListener,
mCreatedObjectStores));
mCachedStatements.Enumerate(DoomCachedStatements, helper);
NS_ASSERTION(!mCachedStatements.Count(), "Statements left!");
nsresult rv = pool->Dispatch(this, helper, true, helper);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
bool
IDBTransaction::StartSavepoint()
{
NS_PRECONDITION(!NS_IsMainThread(), "Wrong thread!");
NS_PRECONDITION(mConnection, "No connection!");
nsCOMPtr<mozIStorageStatement> stmt = GetCachedStatement(NS_LITERAL_CSTRING(
"SAVEPOINT " SAVEPOINT_NAME
));
NS_ENSURE_TRUE(stmt, false);
mozStorageStatementScoper scoper(stmt);
nsresult rv = stmt->Execute();
NS_ENSURE_SUCCESS(rv, false);
++mSavepointCount;
return true;
}
nsresult
IDBTransaction::ReleaseSavepoint()
{
NS_PRECONDITION(!NS_IsMainThread(), "Wrong thread!");
NS_PRECONDITION(mConnection, "No connection!");
NS_ASSERTION(mSavepointCount, "Mismatch!");
nsCOMPtr<mozIStorageStatement> stmt = GetCachedStatement(NS_LITERAL_CSTRING(
"RELEASE SAVEPOINT " SAVEPOINT_NAME
));
NS_ENSURE_TRUE(stmt, false);
mozStorageStatementScoper scoper(stmt);
nsresult rv = stmt->Execute();
NS_ENSURE_SUCCESS(rv, false);
--mSavepointCount;
return NS_OK;
}
void
IDBTransaction::RollbackSavepoint()
{
NS_PRECONDITION(!NS_IsMainThread(), "Wrong thread!");
NS_PRECONDITION(mConnection, "No connection!");
NS_ASSERTION(mSavepointCount == 1, "Mismatch!");
mSavepointCount = 0;
nsCOMPtr<mozIStorageStatement> stmt = GetCachedStatement(NS_LITERAL_CSTRING(
"ROLLBACK TO SAVEPOINT " SAVEPOINT_NAME
));
NS_ENSURE_TRUE(stmt,);
mozStorageStatementScoper scoper(stmt);
nsresult rv = stmt->Execute();
NS_ENSURE_SUCCESS(rv,);
}
nsresult
IDBTransaction::GetOrCreateConnection(mozIStorageConnection** aResult)
{
NS_ASSERTION(!NS_IsMainThread(), "Wrong thread!");
if (mDatabase->IsInvalidated()) {
return NS_ERROR_NOT_AVAILABLE;
}
if (!mConnection) {
nsCOMPtr<mozIStorageConnection> connection =
IDBFactory::GetConnection(mDatabase->FilePath());
NS_ENSURE_TRUE(connection, NS_ERROR_FAILURE);
nsresult rv;
nsRefPtr<UpdateRefcountFunction> function;
nsCString beginTransaction;
if (mMode != IDBTransaction::READ_ONLY) {
function = new UpdateRefcountFunction(Database()->Manager());
NS_ENSURE_TRUE(function, NS_ERROR_OUT_OF_MEMORY);
rv = function->Init();
NS_ENSURE_SUCCESS(rv, rv);
rv = connection->CreateFunction(
NS_LITERAL_CSTRING("update_refcount"), 2, function);
NS_ENSURE_SUCCESS(rv, rv);
beginTransaction.AssignLiteral("BEGIN IMMEDIATE TRANSACTION;");
}
else {
beginTransaction.AssignLiteral("BEGIN TRANSACTION;");
}
nsCOMPtr<mozIStorageStatement> stmt;
rv = connection->CreateStatement(beginTransaction, getter_AddRefs(stmt));
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->Execute();
NS_ENSURE_SUCCESS(rv, rv);
function.swap(mUpdateFileRefcountFunction);
connection.swap(mConnection);
}
nsCOMPtr<mozIStorageConnection> result(mConnection);
result.forget(aResult);
return NS_OK;
}
already_AddRefed<mozIStorageStatement>
IDBTransaction::GetCachedStatement(const nsACString& aQuery)
{
NS_ASSERTION(!NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(!aQuery.IsEmpty(), "Empty sql statement!");
NS_ASSERTION(mConnection, "No connection!");
nsCOMPtr<mozIStorageStatement> stmt;
if (!mCachedStatements.Get(aQuery, getter_AddRefs(stmt))) {
nsresult rv = mConnection->CreateStatement(aQuery, getter_AddRefs(stmt));
#ifdef DEBUG
if (NS_FAILED(rv)) {
nsCString error;
error.AppendLiteral("The statement `");
error.Append(aQuery);
error.AppendLiteral("` failed to compile with the error message `");
nsCString msg;
(void)mConnection->GetLastErrorString(msg);
error.Append(msg);
error.AppendLiteral("`.");
NS_ERROR(error.get());
}
#endif
NS_ENSURE_SUCCESS(rv, nsnull);
if (!mCachedStatements.Put(aQuery, stmt)) {
NS_ERROR("Out of memory?!");
}
}
return stmt.forget();
}
bool
IDBTransaction::IsOpen() const
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
// If we haven't started anything then we're open.
if (mReadyState == IDBTransaction::INITIAL) {
NS_ASSERTION(AsyncConnectionHelper::GetCurrentTransaction() != this,
"This should be some other transaction (or null)!");
return true;
}
// If we've already started then we need to check to see if we still have the
// mCreating flag set. If we do (i.e. we haven't returned to the event loop
// from the time we were created) then we are open. Otherwise check the
// currently running transaction to see if it's the same. We only allow other
// requests to be made if this transaction is currently running.
if (mReadyState == IDBTransaction::LOADING) {
if (mCreating) {
return true;
}
if (AsyncConnectionHelper::GetCurrentTransaction() == this) {
return true;
}
}
return false;
}
already_AddRefed<IDBObjectStore>
IDBTransaction::GetOrCreateObjectStore(const nsAString& aName,
ObjectStoreInfo* aObjectStoreInfo)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(aObjectStoreInfo, "Null pointer!");
nsRefPtr<IDBObjectStore> retval;
for (PRUint32 index = 0; index < mCreatedObjectStores.Length(); index++) {
nsRefPtr<IDBObjectStore>& objectStore = mCreatedObjectStores[index];
if (objectStore->Name() == aName) {
retval = objectStore;
return retval.forget();
}
}
retval = IDBObjectStore::Create(this, aObjectStoreInfo, mDatabaseInfo->id);
mCreatedObjectStores.AppendElement(retval);
return retval.forget();
}
void
IDBTransaction::OnNewFileInfo(FileInfo* aFileInfo)
{
mCreatedFileInfos.AppendElement(aFileInfo);
}
void
IDBTransaction::ClearCreatedFileInfos()
{
mCreatedFileInfos.Clear();
}
NS_IMPL_CYCLE_COLLECTION_CLASS(IDBTransaction)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(IDBTransaction,
IDBWrapperCache)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR_AMBIGUOUS(mDatabase,
nsIDOMEventTarget)
NS_CYCLE_COLLECTION_TRAVERSE_EVENT_HANDLER(error)
NS_CYCLE_COLLECTION_TRAVERSE_EVENT_HANDLER(complete)
NS_CYCLE_COLLECTION_TRAVERSE_EVENT_HANDLER(abort)
for (PRUint32 i = 0; i < tmp->mCreatedObjectStores.Length(); i++) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mCreatedObjectStores[i]");
cb.NoteXPCOMChild(static_cast<nsIIDBObjectStore*>(
tmp->mCreatedObjectStores[i].get()));
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(IDBTransaction, IDBWrapperCache)
// Don't unlink mDatabase!
NS_CYCLE_COLLECTION_UNLINK_EVENT_HANDLER(error)
NS_CYCLE_COLLECTION_UNLINK_EVENT_HANDLER(complete)
NS_CYCLE_COLLECTION_UNLINK_EVENT_HANDLER(abort)
tmp->mCreatedObjectStores.Clear();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(IDBTransaction)
NS_INTERFACE_MAP_ENTRY(nsIIDBTransaction)
NS_INTERFACE_MAP_ENTRY(nsIRunnable)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(IDBTransaction)
NS_INTERFACE_MAP_END_INHERITING(IDBWrapperCache)
NS_IMPL_ADDREF_INHERITED(IDBTransaction, IDBWrapperCache)
NS_IMPL_RELEASE_INHERITED(IDBTransaction, IDBWrapperCache)
DOMCI_DATA(IDBTransaction, IDBTransaction)
NS_IMPL_EVENT_HANDLER(IDBTransaction, error);
NS_IMPL_EVENT_HANDLER(IDBTransaction, complete);
NS_IMPL_EVENT_HANDLER(IDBTransaction, abort);
NS_IMETHODIMP
IDBTransaction::GetDb(nsIIDBDatabase** aDB)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ADDREF(*aDB = mDatabase);
return NS_OK;
}
NS_IMETHODIMP
IDBTransaction::GetMode(nsAString& aMode)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
switch (mMode) {
case READ_ONLY:
aMode.AssignLiteral("readonly");
break;
case READ_WRITE:
aMode.AssignLiteral("readwrite");
break;
case VERSION_CHANGE:
aMode.AssignLiteral("versionchange");
}
return NS_OK;
}
NS_IMETHODIMP
IDBTransaction::GetObjectStoreNames(nsIDOMDOMStringList** aObjectStores)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsRefPtr<nsDOMStringList> list(new nsDOMStringList());
nsAutoTArray<nsString, 10> stackArray;
nsTArray<nsString>* arrayOfNames;
if (mMode == IDBTransaction::VERSION_CHANGE) {
mDatabaseInfo->GetObjectStoreNames(stackArray);
arrayOfNames = &stackArray;
}
else {
arrayOfNames = &mObjectStoreNames;
}
PRUint32 count = arrayOfNames->Length();
for (PRUint32 index = 0; index < count; index++) {
NS_ENSURE_TRUE(list->Add(arrayOfNames->ElementAt(index)),
NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
}
list.forget(aObjectStores);
return NS_OK;
}
NS_IMETHODIMP
IDBTransaction::ObjectStore(const nsAString& aName,
nsIIDBObjectStore** _retval)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (!IsOpen()) {
return NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR;
}
ObjectStoreInfo* info = nsnull;
if (mMode == IDBTransaction::VERSION_CHANGE ||
mObjectStoreNames.Contains(aName)) {
info = mDatabaseInfo->GetObjectStore(aName);
}
if (!info) {
return NS_ERROR_DOM_INDEXEDDB_NOT_FOUND_ERR;
}
nsRefPtr<IDBObjectStore> objectStore = GetOrCreateObjectStore(aName, info);
NS_ENSURE_TRUE(objectStore, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
objectStore.forget(_retval);
return NS_OK;
}
NS_IMETHODIMP
IDBTransaction::Abort()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
// We can't use IsOpen here since we need it to be possible to call Abort()
// even from outside of transaction callbacks.
if (mReadyState != IDBTransaction::INITIAL &&
mReadyState != IDBTransaction::LOADING) {
return NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR;
}
bool needToCommitOrRollback = mReadyState == IDBTransaction::INITIAL;
mAborted = true;
mReadyState = IDBTransaction::DONE;
if (Mode() == IDBTransaction::VERSION_CHANGE) {
// If a version change transaction is aborted, the db must be closed
mDatabase->Close();
}
// Fire the abort event if there are no outstanding requests. Otherwise the
// abort event will be fired when all outstanding requests finish.
if (needToCommitOrRollback) {
return CommitOrRollback();
}
return NS_OK;
}
nsresult
IDBTransaction::PreHandleEvent(nsEventChainPreVisitor& aVisitor)
{
aVisitor.mCanHandle = true;
aVisitor.mParentTarget = mDatabase;
return NS_OK;
}
NS_IMETHODIMP
IDBTransaction::Run()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
// We're back at the event loop, no longer newborn.
mCreating = false;
// Maybe set the readyState to DONE if there were no requests generated.
if (mReadyState == IDBTransaction::INITIAL) {
mReadyState = IDBTransaction::DONE;
if (NS_FAILED(CommitOrRollback())) {
NS_WARNING("Failed to commit!");
}
}
return NS_OK;
}
CommitHelper::CommitHelper(
IDBTransaction* aTransaction,
IDBTransactionListener* aListener,
const nsTArray<nsRefPtr<IDBObjectStore> >& aUpdatedObjectStores)
: mTransaction(aTransaction),
mListener(aListener),
mAborted(!!aTransaction->mAborted)
{
mConnection.swap(aTransaction->mConnection);
mUpdateFileRefcountFunction.swap(aTransaction->mUpdateFileRefcountFunction);
for (PRUint32 i = 0; i < aUpdatedObjectStores.Length(); i++) {
ObjectStoreInfo* info = aUpdatedObjectStores[i]->Info();
if (info->comittedAutoIncrementId != info->nextAutoIncrementId) {
mAutoIncrementObjectStores.AppendElement(aUpdatedObjectStores[i]);
}
}
}
CommitHelper::~CommitHelper()
{
}
NS_IMPL_THREADSAFE_ISUPPORTS1(CommitHelper, nsIRunnable)
NS_IMETHODIMP
CommitHelper::Run()
{
if (NS_IsMainThread()) {
NS_ASSERTION(mDoomedObjects.IsEmpty(), "Didn't release doomed objects!");
mTransaction->mReadyState = IDBTransaction::DONE;
// Release file infos on the main thread, so they will eventually get
// destroyed on correct thread.
mTransaction->ClearCreatedFileInfos();
if (mUpdateFileRefcountFunction) {
mUpdateFileRefcountFunction->ClearFileInfoEntries();
mUpdateFileRefcountFunction = nsnull;
}
nsCOMPtr<nsIDOMEvent> event;
if (mAborted) {
if (mTransaction->GetMode() == IDBTransaction::VERSION_CHANGE) {
// This will make the database take a snapshot of it's DatabaseInfo
mTransaction->Database()->Close();
// Then remove the info from the hash as it contains invalid data.
DatabaseInfo::Remove(mTransaction->Database()->Id());
}
event = CreateGenericEvent(NS_LITERAL_STRING(ABORT_EVT_STR),
eDoesBubble, eNotCancelable);
}
else {
event = CreateGenericEvent(NS_LITERAL_STRING(COMPLETE_EVT_STR),
eDoesNotBubble, eNotCancelable);
}
NS_ENSURE_TRUE(event, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
bool dummy;
if (NS_FAILED(mTransaction->DispatchEvent(event, &dummy))) {
NS_WARNING("Dispatch failed!");
}
#ifdef DEBUG
mTransaction->mFiredCompleteOrAbort = true;
#endif
// Tell the listener (if we have one) that we're done
if (mListener) {
mListener->NotifyTransactionComplete(mTransaction);
}
mTransaction = nsnull;
return NS_OK;
}
IDBDatabase* database = mTransaction->Database();
if (database->IsInvalidated()) {
mAborted = true;
}
if (mConnection) {
IndexedDatabaseManager::SetCurrentWindow(database->GetOwner());
if (!mAborted && mUpdateFileRefcountFunction &&
NS_FAILED(mUpdateFileRefcountFunction->UpdateDatabase(mConnection))) {
mAborted = true;
}
if (!mAborted && NS_FAILED(WriteAutoIncrementCounts())) {
mAborted = true;
}
if (!mAborted) {
NS_NAMED_LITERAL_CSTRING(release, "COMMIT TRANSACTION");
if (NS_SUCCEEDED(mConnection->ExecuteSimpleSQL(release))) {
if (mUpdateFileRefcountFunction) {
mUpdateFileRefcountFunction->UpdateFileInfos();
}
CommitAutoIncrementCounts();
}
else {
mAborted = true;
}
}
if (mAborted) {
RevertAutoIncrementCounts();
NS_NAMED_LITERAL_CSTRING(rollback, "ROLLBACK TRANSACTION");
if (NS_FAILED(mConnection->ExecuteSimpleSQL(rollback))) {
NS_WARNING("Failed to rollback transaction!");
}
}
}
mDoomedObjects.Clear();
if (mConnection) {
if (mUpdateFileRefcountFunction) {
nsresult rv = mConnection->RemoveFunction(
NS_LITERAL_CSTRING("update_refcount"));
if (NS_FAILED(rv)) {
NS_WARNING("Failed to remove function!");
}
}
mConnection->Close();
mConnection = nsnull;
IndexedDatabaseManager::SetCurrentWindow(nsnull);
}
return NS_OK;
}
nsresult
CommitHelper::WriteAutoIncrementCounts()
{
nsCOMPtr<mozIStorageStatement> stmt;
nsresult rv;
for (PRUint32 i = 0; i < mAutoIncrementObjectStores.Length(); i++) {
ObjectStoreInfo* info = mAutoIncrementObjectStores[i]->Info();
if (!stmt) {
rv = mConnection->CreateStatement(NS_LITERAL_CSTRING(
"UPDATE object_store SET auto_increment = :ai "
"WHERE id = :osid;"), getter_AddRefs(stmt));
NS_ENSURE_SUCCESS(rv, rv);
}
else {
stmt->Reset();
}
rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("osid"), info->id);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("ai"),
info->nextAutoIncrementId);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->Execute();
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
void
CommitHelper::CommitAutoIncrementCounts()
{
for (PRUint32 i = 0; i < mAutoIncrementObjectStores.Length(); i++) {
ObjectStoreInfo* info = mAutoIncrementObjectStores[i]->Info();
info->comittedAutoIncrementId = info->nextAutoIncrementId;
}
}
void
CommitHelper::RevertAutoIncrementCounts()
{
for (PRUint32 i = 0; i < mAutoIncrementObjectStores.Length(); i++) {
ObjectStoreInfo* info = mAutoIncrementObjectStores[i]->Info();
info->nextAutoIncrementId = info->comittedAutoIncrementId;
}
}
nsresult
UpdateRefcountFunction::Init()
{
NS_ENSURE_TRUE(mFileInfoEntries.Init(), NS_ERROR_OUT_OF_MEMORY);
return NS_OK;
}
NS_IMPL_THREADSAFE_ISUPPORTS1(UpdateRefcountFunction, mozIStorageFunction)
NS_IMETHODIMP
UpdateRefcountFunction::OnFunctionCall(mozIStorageValueArray* aValues,
nsIVariant** _retval)
{
*_retval = nsnull;
PRUint32 numEntries;
nsresult rv = aValues->GetNumEntries(&numEntries);
NS_ENSURE_SUCCESS(rv, rv);
NS_ASSERTION(numEntries == 2, "unexpected number of arguments");
#ifdef DEBUG
PRInt32 type1 = mozIStorageValueArray::VALUE_TYPE_NULL;
aValues->GetTypeOfIndex(0, &type1);
PRInt32 type2 = mozIStorageValueArray::VALUE_TYPE_NULL;
aValues->GetTypeOfIndex(1, &type2);
NS_ASSERTION(!(type1 == mozIStorageValueArray::VALUE_TYPE_NULL &&
type2 == mozIStorageValueArray::VALUE_TYPE_NULL),
"Shouldn't be called!");
#endif
rv = ProcessValue(aValues, 0, eDecrement);
NS_ENSURE_SUCCESS(rv, rv);
rv = ProcessValue(aValues, 1, eIncrement);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
UpdateRefcountFunction::ProcessValue(mozIStorageValueArray* aValues,
PRInt32 aIndex,
UpdateType aUpdateType)
{
PRInt32 type;
aValues->GetTypeOfIndex(aIndex, &type);
if (type == mozIStorageValueArray::VALUE_TYPE_NULL) {
return NS_OK;
}
nsString ids;
aValues->GetString(aIndex, ids);
nsTArray<PRInt64> fileIds;
nsresult rv = IDBObjectStore::ConvertFileIdsToArray(ids, fileIds);
NS_ENSURE_SUCCESS(rv, rv);
for (PRUint32 i = 0; i < fileIds.Length(); i++) {
PRInt64 id = fileIds.ElementAt(i);
FileInfoEntry* entry;
if (!mFileInfoEntries.Get(id, &entry)) {
nsRefPtr<FileInfo> fileInfo = mFileManager->GetFileInfo(id);
NS_ASSERTION(fileInfo, "Shouldn't be null!");
nsAutoPtr<FileInfoEntry> newEntry(new FileInfoEntry(fileInfo));
if (!mFileInfoEntries.Put(id, newEntry)) {
NS_WARNING("Out of memory?");
return NS_ERROR_OUT_OF_MEMORY;
}
entry = newEntry.forget();
}
switch (aUpdateType) {
case eIncrement:
entry->mDelta++;
break;
case eDecrement:
entry->mDelta--;
break;
default:
NS_NOTREACHED("Unknown update type!");
}
}
return NS_OK;
}
PLDHashOperator
UpdateRefcountFunction::DatabaseUpdateCallback(const PRUint64& aKey,
FileInfoEntry* aValue,
void* aUserArg)
{
if (!aValue->mDelta) {
return PL_DHASH_NEXT;
}
DatabaseUpdateFunction* function =
static_cast<DatabaseUpdateFunction*>(aUserArg);
if (!function->Update(aKey, aValue->mDelta)) {
return PL_DHASH_STOP;
}
return PL_DHASH_NEXT;
}
PLDHashOperator
UpdateRefcountFunction::FileInfoUpdateCallback(const PRUint64& aKey,
FileInfoEntry* aValue,
void* aUserArg)
{
if (aValue->mDelta) {
aValue->mFileInfo->UpdateDBRefs(aValue->mDelta);
}
return PL_DHASH_NEXT;
}
bool
UpdateRefcountFunction::DatabaseUpdateFunction::Update(PRInt64 aId,
PRInt32 aDelta)
{
nsresult rv = UpdateInternal(aId, aDelta);
if (NS_FAILED(rv)) {
mErrorCode = rv;
return false;
}
return true;
}
nsresult
UpdateRefcountFunction::DatabaseUpdateFunction::UpdateInternal(PRInt64 aId,
PRInt32 aDelta)
{
nsresult rv;
if (!mUpdateStatement) {
rv = mConnection->CreateStatement(NS_LITERAL_CSTRING(
"UPDATE file SET refcount = refcount + :delta WHERE id = :id"
), getter_AddRefs(mUpdateStatement));
NS_ENSURE_SUCCESS(rv, rv);
}
mozStorageStatementScoper updateScoper(mUpdateStatement);
rv = mUpdateStatement->BindInt32ByName(NS_LITERAL_CSTRING("delta"), aDelta);
NS_ENSURE_SUCCESS(rv, rv);
rv = mUpdateStatement->BindInt64ByName(NS_LITERAL_CSTRING("id"), aId);
NS_ENSURE_SUCCESS(rv, rv);
rv = mUpdateStatement->Execute();
NS_ENSURE_SUCCESS(rv, rv);
PRInt32 rows;
rv = mConnection->GetAffectedRows(&rows);
NS_ENSURE_SUCCESS(rv, rv);
if (rows > 0) {
return NS_OK;
}
if (!mInsertStatement) {
rv = mConnection->CreateStatement(NS_LITERAL_CSTRING(
"INSERT INTO file (id, refcount) VALUES(:id, :delta)"
), getter_AddRefs(mInsertStatement));
NS_ENSURE_SUCCESS(rv, rv);
}
mozStorageStatementScoper insertScoper(mInsertStatement);
rv = mInsertStatement->BindInt64ByName(NS_LITERAL_CSTRING("id"), aId);
NS_ENSURE_SUCCESS(rv, rv);
rv = mInsertStatement->BindInt32ByName(NS_LITERAL_CSTRING("delta"), aDelta);
NS_ENSURE_SUCCESS(rv, rv);
rv = mInsertStatement->Execute();
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}