aria2/src/FileAllocationCommand.cc

/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2006 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 --> */
#include "FileAllocationCommand.h"
#include "FileAllocationMan.h"
#include "FileAllocationEntry.h"
#include "DownloadEngine.h"
#include "RequestGroup.h"
#include "Logger.h"
#include "message.h"
#include "prefs.h"
#include "util.h"
#include "DownloadEngine.h"
#include "DownloadContext.h"
#include "a2functional.h"
#include "RecoverableException.h"
#include "wallclock.h"

namespace aria2 {

FileAllocationCommand::FileAllocationCommand
(cuid_t cuid, RequestGroup* requestGroup, DownloadEngine* e,
 const SharedHandle<FileAllocationEntry>& fileAllocationEntry):
  RealtimeCommand(cuid, requestGroup, e),
  _fileAllocationEntry(fileAllocationEntry) {}

FileAllocationCommand::~FileAllocationCommand() {}

bool FileAllocationCommand::executeInternal()
{
  if(_e->isHaltRequested()) {
    return true;
  }
  _fileAllocationEntry->allocateChunk();
  if(_fileAllocationEntry->finished()) {
    if(logger->debug()) {
      logger->debug(MSG_ALLOCATION_COMPLETED,
                    _timer.difference(global::wallclock),
                    util::itos(_requestGroup->getTotalLength(), true).c_str());
    }
    _e->_fileAllocationMan->dropPickedEntry();
    
    std::vector<Command*> commands;
    try {
      _fileAllocationEntry->prepareForNextAction(commands, _e);
    } catch(RecoverableException& e) {
      std::for_each(commands.begin(), commands.end(), Deleter());
      throw;
    }
    _e->addCommand(commands);
    _e->setNoWait(true);
    return true;
  } else {
    _e->commands.push_back(this);
    return false;
  }
}

bool FileAllocationCommand::handleException(Exception& e)
{
  _e->_fileAllocationMan->dropPickedEntry();
  logger->error(MSG_FILE_ALLOCATION_FAILURE, e, util::itos(cuid).c_str());
  logger->error(MSG_DOWNLOAD_NOT_COMPLETE, util::itos(cuid).c_str(),
                _requestGroup->getDownloadContext()->getBasePath().c_str());
  return true;
}

} // namespace aria2