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/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
* Wsrep-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* Wsrep-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef WSREP_KEY_HPP
#define WSREP_KEY_HPP
#include "exception.hpp"
#include "buffer.hpp"
#include <iosfwd>
namespace wsrep
{
/** @class key
*
* Certification key type.
*/
class key
{
public:
enum type
{
shared,
reference,
update,
exclusive
};
key(enum type type)
: type_(type)
, key_parts_()
, key_parts_len_()
{ }
/**
* Append key part to key.
*
* @param ptr Pointer to key part data. The caller is supposed to take
* care that the pointer remains valid over the lifetime
* if the key object.
* @param len Length of the key part data.
*/
void append_key_part(const void* ptr, size_t len)
{
if (key_parts_len_ == 3)
{
throw wsrep::runtime_error("key parts exceed maximum of 3");
}
key_parts_[key_parts_len_] = wsrep::const_buffer(ptr, len);
++key_parts_len_;
}
enum type type() const
{
return type_;
}
size_t size() const
{
return key_parts_len_;
}
const wsrep::const_buffer* key_parts() const
{
return key_parts_;
}
private:
enum type type_;
wsrep::const_buffer key_parts_[3];
size_t key_parts_len_;
};
typedef std::vector<wsrep::key> key_array;
std::ostream& operator<<(std::ostream&, enum wsrep::key::type);
std::ostream& operator<<(std::ostream&, const wsrep::key&);
}
#endif // WSREP_KEY_HPP
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