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//
// SessionImpl.h
//
// $Id: //poco/1.4/Data/MySQL/include/Poco/Data/MySQL/SessionImpl.h#1 $
//
// Library: Data
// Package: MySQL
// Module: SessionImpl
//
// Definition of the SessionImpl class.
//
// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
#ifndef Data_MySQL_SessionImpl_INCLUDED
#define Data_MySQL_SessionImpl_INCLUDED
#include "Poco/Data/MySQL/MySQL.h"
#include "Poco/Data/AbstractSessionImpl.h"
#include "Poco/Data/MySQL/SessionHandle.h"
#include "Poco/Data/MySQL/StatementExecutor.h"
#include "Poco/Data/MySQL/ResultMetadata.h"
#include "Poco/Mutex.h"
namespace Poco {
namespace Data {
namespace MySQL {
class MySQL_API SessionImpl: public Poco::Data::AbstractSessionImpl<SessionImpl>
/// Implements SessionImpl interface
{
public:
static const std::string MYSQL_READ_UNCOMMITTED;
static const std::string MYSQL_READ_COMMITTED;
static const std::string MYSQL_REPEATABLE_READ;
static const std::string MYSQL_SERIALIZABLE;
SessionImpl(const std::string& connectionString,
std::size_t loginTimeout = LOGIN_TIMEOUT_DEFAULT);
/// Creates the SessionImpl. Opens a connection to the database
///
/// Connection string format:
/// <str> == <assignment> | <assignment> ';' <str>
/// <assignment> == <name> '=' <value>
/// <name> == 'host' | 'port' | 'user' | 'password' | 'db' } 'compress' | 'auto-reconnect'
/// <value> == [~;]*
///
/// for compress and auto-reconnect correct values are true/false
/// for port - numeric in decimal notation
///
~SessionImpl();
/// Destroys the SessionImpl.
Poco::Data::StatementImpl* createStatementImpl();
/// Returns an MySQL StatementImpl
void open(const std::string& connection = "");
/// Opens a connection to the database.
void close();
/// Closes the connection.
bool isConnected();
/// Returns true if connected, false otherwise.
void setConnectionTimeout(std::size_t timeout);
/// Sets the session connection timeout value.
std::size_t getConnectionTimeout();
/// Returns the session connection timeout value.
void begin();
/// Starts a transaction
void commit();
/// Commits and ends a transaction
void rollback();
/// Aborts a transaction
bool canTransact();
/// Returns true if session has transaction capabilities.
bool isTransaction();
/// Returns true iff a transaction is a transaction is in progress, false otherwise.
void setTransactionIsolation(Poco::UInt32 ti);
/// Sets the transaction isolation level.
Poco::UInt32 getTransactionIsolation();
/// Returns the transaction isolation level.
bool hasTransactionIsolation(Poco::UInt32 ti);
/// Returns true iff the transaction isolation level corresponding
/// to the supplied bitmask is supported.
bool isTransactionIsolation(Poco::UInt32 ti);
/// Returns true iff the transaction isolation level corresponds
/// to the supplied bitmask.
void autoCommit(const std::string&, bool val);
/// Sets autocommit property for the session.
bool isAutoCommit(const std::string& name="");
/// Returns autocommit property value.
void setInsertId(const std::string&, const Poco::Any&);
/// Try to set insert id - do nothing.
Poco::Any getInsertId(const std::string&);
/// Get insert id
SessionHandle& handle();
// Get handle
const std::string& connectorName() const;
/// Returns the name of the connector.
private:
template <typename T>
inline T& getValue(MYSQL_BIND* pResult, T& val)
{
return val = *((T*) pResult->buffer);
}
template <typename T>
T& getSetting(const std::string& name, T& val)
/// Returns required setting.
/// Limited to one setting at a time.
{
StatementExecutor ex(_handle);
ResultMetadata metadata;
metadata.reset();
ex.prepare(Poco::format("SELECT @@%s", name));
metadata.init(ex);
if (metadata.columnsReturned() > 0)
ex.bindResult(metadata.row());
else
throw InvalidArgumentException("No data returned.");
ex.execute(); ex.fetch();
MYSQL_BIND* pResult = metadata.row();
return getValue<T>(pResult, val);
}
std::string _connector;
SessionHandle _handle;
bool _connected;
bool _inTransaction;
std::size_t _timeout;
Poco::FastMutex _mutex;
};
//
// inlines
//
inline bool SessionImpl::canTransact()
{
return true;
}
inline void SessionImpl::setInsertId(const std::string&, const Poco::Any&)
{
}
inline Poco::Any SessionImpl::getInsertId(const std::string&)
{
return Poco::Any(Poco::UInt64(mysql_insert_id(_handle)));
}
inline SessionHandle& SessionImpl::handle()
{
return _handle;
}
inline const std::string& SessionImpl::connectorName() const
{
return _connector;
}
inline bool SessionImpl::isTransaction()
{
return _inTransaction;
}
inline bool SessionImpl::isTransactionIsolation(Poco::UInt32 ti)
{
return getTransactionIsolation() == ti;
}
inline bool SessionImpl::isConnected()
{
return _connected;
}
inline std::size_t SessionImpl::getConnectionTimeout()
{
return _timeout;
}
template <>
inline std::string& SessionImpl::getValue(MYSQL_BIND* pResult, std::string& val)
{
val.assign((char*) pResult->buffer, pResult->buffer_length);
return val;
}
} } } // namespace Poco::Data::MySQL
#endif // Data_MySQL_SessionImpl_INCLUDED