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// file : odb/connection.hxx
// author : Boris Kolpackov <boris@codesynthesis.com>
// copyright : Copyright (c) 2005-2011 Code Synthesis Tools CC
// license : GNU GPL v2; see accompanying LICENSE file
#ifndef ODB_CONNECTION_HXX
#define ODB_CONNECTION_HXX
#include <odb/pre.hxx>
#include <string>
#include <cstddef> // std::size_t
#include <odb/forward.hxx>
#include <odb/details/export.hxx>
#include <odb/details/shared-ptr.hxx>
namespace odb
{
class transaction_impl;
class connection;
typedef details::shared_ptr<connection> connection_ptr;
class LIBODB_EXPORT connection: public details::shared_base
{
public:
typedef odb::database database_type;
database_type&
database ();
// Transactions.
//
public:
virtual transaction_impl*
begin () = 0;
// Native database statement execution. Note that unlike the
// versions in the database class, these can be executed
// without a transaction.
//
public:
unsigned long long
execute (const char* statement);
unsigned long long
execute (const std::string& statement);
virtual unsigned long long
execute (const char* statement, std::size_t length) = 0;
// SQL statement tracing.
//
public:
typedef odb::tracer tracer_type;
void
tracer (tracer_type&);
void
tracer (tracer_type*);
tracer_type*
tracer () const;
public:
// Store the transaction-spacific tracer in the connection. If we
// were to store it in the transaction, then in order to check if
// it was set, we would need to get the transaction instance using
// the current() API. But that requires a TLS lookup, which can be
// slow.
//
tracer_type*
transaction_tracer () const;
public:
virtual
~connection ();
protected:
connection (database_type&);
private:
connection (const connection&);
connection& operator= (const connection&);
protected:
database_type& database_;
tracer_type* tracer_;
protected:
friend class transaction;
tracer_type* transaction_tracer_;
};
}
#include <odb/connection.ixx>
#include <odb/post.hxx>
#endif // ODB_MYSQL_CONNECTION_HXX
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