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//
// Notifier.cpp
//
// $Id: //poco/Main/Data/SQLite/src/Notifier.cpp#5 $
//
// Library: SQLite
// Package: SQLite
// Module: Notifier
//
// Implementation of Notifier
//
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Data/SQLite/Notifier.h"
namespace Poco {
namespace Data {
namespace SQLite {
Notifier::Notifier(const Session& session, EnabledEventType enabled):
_session(session)
{
if (enabled & SQLITE_NOTIFY_UPDATE) enableUpdate();
if (enabled & SQLITE_NOTIFY_COMMIT) enableCommit();
if (enabled & SQLITE_NOTIFY_ROLLBACK) enableRollback();
}
Notifier::Notifier(const Session& session, const Any& value, EnabledEventType enabled):
_session(session),
_value(value)
{
if (enabled & SQLITE_NOTIFY_UPDATE) enableUpdate();
if (enabled & SQLITE_NOTIFY_COMMIT) enableCommit();
if (enabled & SQLITE_NOTIFY_ROLLBACK) enableRollback();
}
Notifier::~Notifier()
{
try
{
disableAll();
}
catch (...)
{
poco_unexpected();
}
}
bool Notifier::enableUpdate()
{
Poco::Mutex::ScopedLock l(_mutex);
if (Utility::registerUpdateHandler(Utility::dbHandle(_session), &sqliteUpdateCallbackFn, this))
_enabledEvents |= SQLITE_NOTIFY_UPDATE;
return updateEnabled();
}
bool Notifier::disableUpdate()
{
Poco::Mutex::ScopedLock l(_mutex);
if (Utility::registerUpdateHandler(Utility::dbHandle(_session), (Utility::UpdateCallbackType) 0, this))
_enabledEvents &= ~SQLITE_NOTIFY_UPDATE;
return !updateEnabled();
}
bool Notifier::updateEnabled() const
{
return 0 != (_enabledEvents & SQLITE_NOTIFY_UPDATE);
}
bool Notifier::enableCommit()
{
Poco::Mutex::ScopedLock l(_mutex);
if (Utility::registerUpdateHandler(Utility::dbHandle(_session), &sqliteCommitCallbackFn, this))
_enabledEvents |= SQLITE_NOTIFY_COMMIT;
return commitEnabled();
}
bool Notifier::disableCommit()
{
Poco::Mutex::ScopedLock l(_mutex);
if (Utility::registerUpdateHandler(Utility::dbHandle(_session), (Utility::CommitCallbackType) 0, this))
_enabledEvents &= ~SQLITE_NOTIFY_COMMIT;
return !commitEnabled();
}
bool Notifier::commitEnabled() const
{
return 0 != (_enabledEvents & SQLITE_NOTIFY_COMMIT);
}
bool Notifier::enableRollback()
{
Poco::Mutex::ScopedLock l(_mutex);
if (Utility::registerUpdateHandler(Utility::dbHandle(_session), &sqliteRollbackCallbackFn, this))
_enabledEvents |= SQLITE_NOTIFY_ROLLBACK;
return rollbackEnabled();
}
bool Notifier::disableRollback()
{
Poco::Mutex::ScopedLock l(_mutex);
if (Utility::registerUpdateHandler(Utility::dbHandle(_session), (Utility::RollbackCallbackType) 0, this))
_enabledEvents &= ~SQLITE_NOTIFY_ROLLBACK;
return !rollbackEnabled();
}
bool Notifier::rollbackEnabled() const
{
return 0 != (_enabledEvents & SQLITE_NOTIFY_ROLLBACK);
}
bool Notifier::enableAll()
{
return enableUpdate() && enableCommit() && enableRollback();
}
bool Notifier::disableAll()
{
return disableUpdate() && disableCommit() && disableRollback();
}
void Notifier::sqliteUpdateCallbackFn(void* pVal, int opCode, const char* pDB, const char* pTable, Poco::Int64 row)
{
poco_check_ptr(pVal);
Notifier* pV = reinterpret_cast<Notifier*>(pVal);
if (opCode == Utility::OPERATION_INSERT)
{
pV->_row = row;
pV->insert.notify(pV);
}
else if (opCode == Utility::OPERATION_UPDATE)
{
pV->_row = row;
pV->update.notify(pV);
}
else if (opCode == Utility::OPERATION_DELETE)
{
pV->_row = row;
pV->erase.notify(pV);
}
}
int Notifier::sqliteCommitCallbackFn(void* pVal)
{
Notifier* pV = reinterpret_cast<Notifier*>(pVal);
try
{
pV->commit.notify(pV);
}
catch (...)
{
return -1;
}
return 0;
}
void Notifier::sqliteRollbackCallbackFn(void* pVal)
{
Notifier* pV = reinterpret_cast<Notifier*>(pVal);
pV->rollback.notify(pV);
}
} } } // namespace Poco::Data::SQLite