| /* |
| * Copyright (C) 2013 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #include "config.h" |
| #include "SQLiteIDBTransaction.h" |
| |
| #if ENABLE(INDEXED_DATABASE) && ENABLE(DATABASE_PROCESS) |
| |
| #include "SQLiteIDBCursor.h" |
| #include "UniqueIDBDatabaseBackingStoreSQLite.h" |
| #include <WebCore/IndexedDB.h> |
| #include <WebCore/SQLiteTransaction.h> |
| |
| using namespace WebCore; |
| |
| static int64_t nextCursorID = 1; |
| |
| namespace WebKit { |
| |
| SQLiteIDBTransaction::SQLiteIDBTransaction(UniqueIDBDatabaseBackingStoreSQLite& backingStore, const IDBIdentifier& transactionIdentifier, IndexedDB::TransactionMode mode) |
| : m_identifier(transactionIdentifier) |
| , m_mode(mode) |
| , m_backingStore(backingStore) |
| { |
| } |
| |
| SQLiteIDBTransaction::~SQLiteIDBTransaction() |
| { |
| if (inProgress()) |
| m_sqliteTransaction->rollback(); |
| |
| // Explicitly clear cursors, as that also unregisters them from the backing store. |
| clearCursors(); |
| } |
| |
| |
| bool SQLiteIDBTransaction::begin(SQLiteDatabase& database) |
| { |
| ASSERT(!m_sqliteTransaction); |
| m_sqliteTransaction = std::make_unique<SQLiteTransaction>(database, m_mode == IndexedDB::TransactionMode::ReadOnly); |
| |
| m_sqliteTransaction->begin(); |
| |
| return m_sqliteTransaction->inProgress(); |
| } |
| |
| bool SQLiteIDBTransaction::commit() |
| { |
| // It's okay to not have a SQLite transaction or not have started it yet because it's okay for a WebProcess |
| // to request the commit of a transaction immediately after creating it before it has even been used. |
| if (!m_sqliteTransaction || !m_sqliteTransaction->inProgress()) |
| return false; |
| |
| m_sqliteTransaction->commit(); |
| |
| return !m_sqliteTransaction->inProgress(); |
| } |
| |
| bool SQLiteIDBTransaction::reset() |
| { |
| m_sqliteTransaction = nullptr; |
| clearCursors(); |
| |
| return true; |
| } |
| |
| bool SQLiteIDBTransaction::rollback() |
| { |
| ASSERT(m_sqliteTransaction); |
| if (m_sqliteTransaction->inProgress()) |
| m_sqliteTransaction->rollback(); |
| |
| return true; |
| } |
| |
| SQLiteIDBCursor* SQLiteIDBTransaction::openCursor(int64_t objectStoreID, int64_t indexID, IndexedDB::CursorDirection cursorDirection, IndexedDB::CursorType cursorType, IDBDatabaseBackend::TaskType taskType, const IDBKeyRangeData& keyRange) |
| { |
| ASSERT(m_sqliteTransaction); |
| if (!m_sqliteTransaction->inProgress()) |
| return nullptr; |
| |
| IDBIdentifier cursorIdentifier(m_identifier.connection(), nextCursorID++); |
| |
| auto addResult = m_cursors.add(cursorIdentifier, SQLiteIDBCursor::maybeCreate(this, cursorIdentifier, objectStoreID, indexID, cursorDirection, cursorType, taskType, keyRange)); |
| |
| ASSERT(addResult.isNewEntry); |
| |
| // It is possible the cursor failed to create and we just stored a null value. |
| if (!addResult.iterator->value) { |
| m_cursors.remove(addResult.iterator); |
| return nullptr; |
| } |
| |
| return addResult.iterator->value.get(); |
| } |
| |
| void SQLiteIDBTransaction::closeCursor(SQLiteIDBCursor& cursor) |
| { |
| ASSERT(m_cursors.contains(cursor.identifier())); |
| |
| m_backingStore.unregisterCursor(&cursor); |
| m_cursors.remove(cursor.identifier()); |
| } |
| |
| void SQLiteIDBTransaction::notifyCursorsOfChanges(int64_t objectStoreID) |
| { |
| for (auto& i : m_cursors) { |
| if (i.value->objectStoreID() == objectStoreID) |
| i.value->objectStoreRecordsChanged(); |
| } |
| } |
| |
| void SQLiteIDBTransaction::clearCursors() |
| { |
| for (auto& cursor : m_cursors.values()) |
| m_backingStore.unregisterCursor(cursor.get()); |
| |
| m_cursors.clear(); |
| } |
| |
| bool SQLiteIDBTransaction::inProgress() const |
| { |
| return m_sqliteTransaction && m_sqliteTransaction->inProgress(); |
| } |
| |
| } // namespace WebKit |
| |
| #endif // ENABLE(INDEXED_DATABASE) && ENABLE(DATABASE_PROCESS) |