aria2/src/SequentialDispatcherCommand.h

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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2009 Tatsuhiro Tsujikawa
*
* 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_SEQUENTIAL_DISPATCHER_COMMAND_H_
#define _D_SEQUENTIAL_DISPATCHER_COMMAND_H_
#include "Command.h"
#include "SharedHandle.h"
#include "SequentialPicker.h"
#include "DownloadEngine.h"
#include "RequestGroupMan.h"
namespace aria2 {
class DownloadEngine;
template<typename T>
class SequentialDispatcherCommand : public Command {
protected:
SharedHandle<SequentialPicker<T> > _picker;
DownloadEngine* _e;
public:
SequentialDispatcherCommand(int32_t cuid,
const SharedHandle<SequentialPicker<T> >& picker,
DownloadEngine* e):
Command(cuid), _picker(picker), _e(e) {}
virtual bool execute()
{
if(_e->_requestGroupMan->downloadFinished() || _e->isHaltRequested()) {
return true;
}
if(_picker->hasNext() && !_picker->isPicked()) {
_e->commands.push_back(createCommand(_picker->pickNext()));
_e->setNoWait(true);
}
_e->addRoutineCommand(this);
return false;
}
protected:
virtual Command* createCommand(const SharedHandle<T>& entry) = 0;
};
} // namespace aria2
#endif // _D_SEQUENTIAL_DISPATCHER_COMMAND_H_