srs/trunk/src/kernel/srs_kernel_balance.hpp

/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2013-2020 Winlin
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * 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 AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef SRS_KERNEL_BALANCE_HPP
#define SRS_KERNEL_BALANCE_HPP

#include <srs_core.hpp>

#include <vector>
#include <string>

/**
 * the round-robin load balance algorithm,
 * used for edge pull and other multiple server feature.
 */
class SrsLbRoundRobin
{
private:
    // current selected index.
    int index;
    // total scheduled count.
    uint32_t count;
    // current selected server.
    std::string elem;
public:
    SrsLbRoundRobin();
    virtual ~SrsLbRoundRobin();
public:
    virtual uint32_t current();
    virtual std::string selected();
    virtual std::string select(const std::vector<std::string>& servers);
};

#endif