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SessionImpl.cpp
//
// MySQLException.cpp
//
// $Id: //poco/1.4/Data/MySQL/src/SessionImpl.cpp#1 $
//
// Library: Data/MySQL
// Package: MySQL
// Module:  SessionImpl
//
// 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.
//


#include "Poco/Data/MySQL/SessionImpl.h"
#include "Poco/Data/MySQL/MySQLStatementImpl.h"
#include "Poco/NumberParser.h"


namespace
{
      std::string copyStripped(std::string::const_iterator from, std::string::const_iterator to)
      {
            // skip leading spaces
            while ((from != to) && isspace(*from)) from++;
            // skip trailing spaces
            while ((from != to) && isspace(*(to - 1))) to--;

            return std::string(from, to);
      }
}


namespace Poco {
namespace Data {
namespace MySQL {


SessionImpl::SessionImpl(const std::string& connectionString) : _mysql(0), _connected(false), _inTransaction(0)
{
      addProperty("insertId", 
            &SessionImpl::setInsertId, 
            &SessionImpl::getInsertId);

      std::map<std::string, std::string> options;

      // Default values
      options["host"] = "localhost";
      options["port"] = "3306";
      options["user"] = "";
      options["password"] = "";
      options["db"] = "";
      options["compress"] = "";
      options["auto-reconnect"] = "";

      //
      // Parse string
      //

      for (std::string::const_iterator start = connectionString.begin();;) 
      {
            // find next ';'
            std::string::const_iterator finish = std::find(start, connectionString.end(), ';');

            // find '='
            std::string::const_iterator middle = std::find(start, finish, '=');

            if (middle == finish)
            {
                  throw MySQLException("create session: bad connection string format, can not find '='");
            }

            // Parse name and value, skip all spaces
            options[copyStripped(start, middle)] = copyStripped(middle + 1, finish);

            if (finish == connectionString.end())
            {
                  // end of parse
                  break;
            }

            // move start position after ';'
            start = finish + 1;
      } 

      //
      // Checking
      //

      if (options["user"] == "")
      {
            throw MySQLException("create session: specify user name");
      }

      if (options["db"] == "")
      {
            throw MySQLException("create session: specify database");
      }

      unsigned int port = 0;
      if (!NumberParser::tryParseUnsigned(options["port"], port) || 0 == port || port > 65535)
      {
            throw MySQLException("create session: specify correct port (numeric in decimal notation)");
      }

      //
      // Options
      //

      if (options["compress"] == "true")
      {
            _mysql.options(MYSQL_OPT_COMPRESS);
      }
      else if (options["compress"] == "false")
      {
            // do nothing
      }
      else if (options["compress"] != "")
      {
            throw MySQLException("create session: specify correct compress option (true or false) or skip it");
      }

      if (options["auto-reconnect"] == "true")
      {
            _mysql.options(MYSQL_OPT_RECONNECT, true);
      }
      else if (options["auto-reconnect"] == "false")
      {
            _mysql.options(MYSQL_OPT_RECONNECT, false);
      }
      else if (options["auto-reconnect"] != "")
      {
            throw MySQLException("create session: specify correct auto-reconnect option (true or false) or skip it");
      }

      //
      // Real connect
      //

      _mysql.connect(
                  options["host"].c_str(), 
                  options["user"].c_str(), 
                  options["password"].c_str(), 
                  options["db"].c_str(), 
                  port);

      _connected = true;
}
      

00173 SessionImpl::~SessionImpl()
{
      close();
}
      

00179 Poco::Data::StatementImpl* SessionImpl::createStatementImpl()
{
      return new MySQLStatementImpl(_mysql);
}     


00185 void SessionImpl::begin()
{
      _mysql.query("START TRANSACTION");
      _inTransaction++;
}


00192 void SessionImpl::commit()
{
      _mysql.query("COMMIT");
      _inTransaction--;

      // ?
      // mysql_commit(fMysql);
}
      

00202 void SessionImpl::rollback()
{
      _mysql.query("ROLLBACK");
      _inTransaction--;

      // ?
      // mysql_commit(fMysql);
}
      

00212 void SessionImpl::close()
{
      if (_connected)
      {
            _mysql.close();
            _connected = false;
      }
}
      

00222 bool SessionImpl::isConnected()
{
      return _connected;
}
      

00228 bool SessionImpl::isTransaction()
{
      return (_inTransaction > 0);
}


} } } // namespace Poco::Data::MySQL

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