IDBTransaction.cpp [plain text]
#include "config.h"
#include "IDBTransaction.h"
#if ENABLE(INDEXED_DATABASE)
#include "EventException.h"
#include "EventQueue.h"
#include "IDBDatabase.h"
#include "IDBDatabaseException.h"
#include "IDBEventDispatcher.h"
#include "IDBIndex.h"
#include "IDBObjectStore.h"
#include "IDBObjectStoreBackendInterface.h"
#include "IDBPendingTransactionMonitor.h"
#include "IDBTracing.h"
namespace WebCore {
PassRefPtr<IDBTransaction> IDBTransaction::create(ScriptExecutionContext* context, PassRefPtr<IDBTransactionBackendInterface> backend, IDBDatabase* db)
{
RefPtr<IDBTransaction> transaction(adoptRef(new IDBTransaction(context, backend, db)));
transaction->suspendIfNeeded();
return transaction.release();
}
IDBTransaction::IDBTransaction(ScriptExecutionContext* context, PassRefPtr<IDBTransactionBackendInterface> backend, IDBDatabase* db)
: ActiveDOMObject(context, this)
, m_backend(backend)
, m_database(db)
, m_mode(m_backend->mode())
, m_transactionFinished(false)
, m_contextStopped(false)
{
ASSERT(m_backend);
IDBPendingTransactionMonitor::addPendingTransaction(m_backend.get());
}
IDBTransaction::~IDBTransaction()
{
}
IDBTransactionBackendInterface* IDBTransaction::backend() const
{
return m_backend.get();
}
bool IDBTransaction::finished() const
{
return m_transactionFinished;
}
unsigned short IDBTransaction::mode() const
{
return m_mode;
}
IDBDatabase* IDBTransaction::db() const
{
return m_database.get();
}
PassRefPtr<IDBObjectStore> IDBTransaction::objectStore(const String& name, ExceptionCode& ec)
{
if (m_transactionFinished) {
ec = IDBDatabaseException::NOT_ALLOWED_ERR;
return 0;
}
IDBObjectStoreMap::iterator it = m_objectStoreMap.find(name);
if (it != m_objectStoreMap.end())
return it->second;
RefPtr<IDBObjectStoreBackendInterface> objectStoreBackend = m_backend->objectStore(name, ec);
if (!objectStoreBackend) {
ASSERT(ec);
return 0;
}
RefPtr<IDBObjectStore> objectStore = IDBObjectStore::create(objectStoreBackend, this);
objectStoreCreated(name, objectStore);
return objectStore.release();
}
void IDBTransaction::objectStoreCreated(const String& name, PassRefPtr<IDBObjectStore> objectStore)
{
ASSERT(!m_transactionFinished);
m_objectStoreMap.set(name, objectStore);
}
void IDBTransaction::objectStoreDeleted(const String& name)
{
ASSERT(!m_transactionFinished);
m_objectStoreMap.remove(name);
}
void IDBTransaction::abort()
{
if (m_transactionFinished)
return;
RefPtr<IDBTransaction> selfRef = this;
if (m_backend)
m_backend->abort();
}
IDBTransaction::OpenCursorNotifier::OpenCursorNotifier(PassRefPtr<IDBTransaction> transaction, IDBCursor* cursor)
: m_transaction(transaction),
m_cursor(cursor)
{
m_transaction->registerOpenCursor(m_cursor);
}
IDBTransaction::OpenCursorNotifier::~OpenCursorNotifier()
{
m_transaction->unregisterOpenCursor(m_cursor);
}
void IDBTransaction::registerOpenCursor(IDBCursor* cursor)
{
m_openCursors.add(cursor);
}
void IDBTransaction::unregisterOpenCursor(IDBCursor* cursor)
{
m_openCursors.remove(cursor);
}
void IDBTransaction::closeOpenCursors()
{
HashSet<IDBCursor*> cursors;
cursors.swap(m_openCursors);
for (HashSet<IDBCursor*>::iterator i = cursors.begin(); i != cursors.end(); ++i)
(*i)->close();
}
void IDBTransaction::registerRequest(IDBRequest* request)
{
m_childRequests.add(request);
}
void IDBTransaction::unregisterRequest(IDBRequest* request)
{
m_childRequests.remove(request);
}
void IDBTransaction::onAbort()
{
ASSERT(!m_transactionFinished);
while (!m_childRequests.isEmpty()) {
IDBRequest* request = *m_childRequests.begin();
m_childRequests.remove(request);
request->abort();
}
if (m_mode == IDBTransaction::VERSION_CHANGE)
m_database->clearVersionChangeTransaction(this);
closeOpenCursors();
if (m_contextStopped || !scriptExecutionContext())
return;
enqueueEvent(Event::create(eventNames().abortEvent, true, false));
}
void IDBTransaction::onComplete()
{
ASSERT(!m_transactionFinished);
if (m_mode == IDBTransaction::VERSION_CHANGE)
m_database->clearVersionChangeTransaction(this);
closeOpenCursors();
if (m_contextStopped || !scriptExecutionContext())
return;
enqueueEvent(Event::create(eventNames().completeEvent, false, false));
}
bool IDBTransaction::hasPendingActivity() const
{
return !m_transactionFinished || ActiveDOMObject::hasPendingActivity();
}
const AtomicString& IDBTransaction::interfaceName() const
{
return eventNames().interfaceForIDBTransaction;
}
ScriptExecutionContext* IDBTransaction::scriptExecutionContext() const
{
return ActiveDOMObject::scriptExecutionContext();
}
bool IDBTransaction::dispatchEvent(PassRefPtr<Event> event)
{
IDB_TRACE("IDBTransaction::dispatchEvent");
ASSERT(!m_transactionFinished);
ASSERT(scriptExecutionContext());
ASSERT(event->target() == this);
m_transactionFinished = true;
for (IDBObjectStoreMap::iterator it = m_objectStoreMap.begin(); it != m_objectStoreMap.end(); ++it)
it->second->transactionFinished();
m_objectStoreMap.clear();
Vector<RefPtr<EventTarget> > targets;
targets.append(this);
targets.append(db());
ASSERT(event->type() == eventNames().completeEvent || event->type() == eventNames().abortEvent);
return IDBEventDispatcher::dispatch(event.get(), targets);
}
bool IDBTransaction::canSuspend() const
{
return m_transactionFinished;
}
void IDBTransaction::stop()
{
ActiveDOMObject::stop();
m_contextStopped = true;
abort();
}
void IDBTransaction::enqueueEvent(PassRefPtr<Event> event)
{
ASSERT_WITH_MESSAGE(!m_transactionFinished, "A finished transaction tried to enqueue an event of type %s.", event->type().string().utf8().data());
if (m_contextStopped || !scriptExecutionContext())
return;
EventQueue* eventQueue = scriptExecutionContext()->eventQueue();
event->setTarget(this);
eventQueue->enqueueEvent(event);
}
EventTargetData* IDBTransaction::eventTargetData()
{
return &m_eventTargetData;
}
EventTargetData* IDBTransaction::ensureEventTargetData()
{
return &m_eventTargetData;
}
}
#endif // ENABLE(INDEXED_DATABASE)