aria2/src/DHTBucketRefreshTask.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 "DHTBucketRefreshTask.h"
#include "DHTBucket.h"
#include "DHTRoutingTable.h"
#include "DHTNodeLookupTask.h"
#include "DHTTaskQueue.h"
#include "DHTNode.h"
#include "DHTNodeLookupEntry.h"
#include "util.h"
#include "Logger.h"

namespace aria2 {

DHTBucketRefreshTask::DHTBucketRefreshTask():
  _forceRefresh(false) {}

DHTBucketRefreshTask::~DHTBucketRefreshTask() {}

void DHTBucketRefreshTask::startup()
{
  std::vector<SharedHandle<DHTBucket> > buckets;
  _routingTable->getBuckets(buckets);
  for(std::vector<SharedHandle<DHTBucket> >::iterator i = buckets.begin(),
        eoi = buckets.end(); i != eoi; ++i) {
    if(_forceRefresh || (*i)->needsRefresh()) {
      (*i)->notifyUpdate();
      unsigned char targetID[DHT_ID_LENGTH];
      (*i)->getRandomNodeID(targetID);
      SharedHandle<DHTNodeLookupTask> task(new DHTNodeLookupTask(targetID));
      task->setRoutingTable(_routingTable);
      task->setMessageDispatcher(_dispatcher);
      task->setMessageFactory(_factory);
      task->setTaskQueue(_taskQueue);
      task->setLocalNode(_localNode);

      _logger->info("Dispating bucket refresh. targetID=%s", util::toHex(targetID, DHT_ID_LENGTH).c_str());
      _taskQueue->addPeriodicTask1(task);
    }
  }
  _finished = true;
}

void DHTBucketRefreshTask::setForceRefresh(bool forceRefresh)
{
  _forceRefresh = forceRefresh;
}

} // namespace aria2