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//
// Copyright (C) 2015 Maciej Sobczak
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
//
#ifndef SOCI_CALLBACKS_H_INCLUDED
#define SOCI_CALLBACKS_H_INCLUDED
#include <string>
namespace soci
{
class session;
// Simple callback interface for reporting failover events.
// The meaning of each operation is intended to be portable,
// but the behaviour details and parameters can be backend-specific.
class failover_callback
{
public:
failover_callback() = default;
virtual ~failover_callback() = default;
// Called when the failover operation has started,
// after discovering connectivity problems.
virtual void started() {}
// Called after successful failover and creating a new connection;
// the sql parameter denotes the new connection and allows the user
// to replay any initial sequence of commands (like session configuration).
virtual void finished(session& /* sql */) {}
// Called when the attempt to reconnect failed,
// if the user code sets the retry parameter to true,
// then new connection will be attempted;
// the newTarget connection string is a hint that can be ignored
// by external means.
virtual void failed(bool& /* out */ /* retry */,
std::string& /* out */ /* newTarget */) {}
// Called when there was a failure that prevents further failover attempts.
virtual void aborted() {}
};
} // namespace soci
#endif // SOCI_CALLBACKS_H_INCLUDED
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