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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
* Copyright (C) 2008 Aurelien Lefebvre, Mandriva
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#ifndef D_ADAPTIVE_URI_SELECTOR_H
#define D_ADAPTIVE_URI_SELECTOR_H
#include "URISelector.h"
#include <memory>
#include <chrono>
namespace aria2 {
class ServerStatMan;
class RequestGroup;
class ServerStat;
class AdaptiveURISelector : public URISelector {
private:
std::shared_ptr<ServerStatMan> serverStatMan_;
// No need to delete requestGroup_
RequestGroup* requestGroup_;
int nbServerToEvaluate_;
int nbConnections_;
void mayRetryWithIncreasedTimeout(FileEntry* fileEntry);
std::string selectOne(const std::deque<std::string>& uris);
void adjustLowestSpeedLimit(const std::deque<std::string>& uris,
DownloadCommand* command) const;
int getMaxDownloadSpeed(const std::deque<std::string>& uris) const;
std::string getMaxDownloadSpeedUri(const std::deque<std::string>& uris) const;
std::deque<std::string> getUrisBySpeed(const std::deque<std::string>& uris,
int min) const;
std::string selectRandomUri(const std::deque<std::string>& uris) const;
std::string getFirstNotTestedUri(const std::deque<std::string>& uris) const;
std::string getFirstToTestUri(const std::deque<std::string>& uris) const;
std::shared_ptr<ServerStat> getServerStats(const std::string& uri) const;
int getNbTestedServers(const std::deque<std::string>& uris) const;
std::string getBestMirror(const std::deque<std::string>& uris) const;
public:
AdaptiveURISelector(std::shared_ptr<ServerStatMan> serverStatMan,
RequestGroup* requestGroup);
virtual ~AdaptiveURISelector();
virtual std::string
select(FileEntry* fileEntry,
const std::vector<std::pair<size_t, std::string>>& usedHosts)
CXX11_OVERRIDE;
virtual void tuneDownloadCommand(const std::deque<std::string>& uris,
DownloadCommand* command) CXX11_OVERRIDE;
virtual void resetCounters() CXX11_OVERRIDE;
};
} // namespace aria2
#endif // D_ADAPTIVE_URI_SELECTOR_H
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