text: /*
   *    Copyright (C) 2010 10gen Inc.
   *
   *    This program is free software: you can redistribute it and/or  modify
   *    it under the terms of the GNU Affero General Public License, version 3,
   *    as published by the Free Software Foundation.
   *
   *    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 Affero General Public License for more details.
   *
   *    You should have received a copy of the GNU Affero General Public License
   *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
   *
   *    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 program with the OpenSSL library. You
   *    must comply with the GNU Affero General Public License in all respects for
   *    all of the code used other than as permitted herein. 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 in the license file.
   */
  
  #pragma once
  
  #include <climits>
  
  #include "mongo/bson/optime.h"
  #include "mongo/db/repl/member_state.h"
  #include "mongo/util/concurrency/value.h"
  
  namespace mongo {
  namespace repl {
  
      /* this is supposed to be just basic information on a member,
         and copy constructable. */
      class HeartbeatInfo {
      public:
          HeartbeatInfo();
          HeartbeatInfo(unsigned id);
          unsigned id() const { return _id; }
          MemberState hbstate;
          double health;
          time_t upSince;
          long long downSince;
          // This is the last time we got a response from a heartbeat request to a given member.
          time_t lastHeartbeat;
          // This is the last time we got a heartbeat request from a given member.
          time_t lastHeartbeatRecv;
          DiagStr lastHeartbeatMsg;
          DiagStr syncingTo;
          OpTime opTime;
          int skew;
          bool authIssue;
          unsigned int ping; // milliseconds
          static unsigned int numPings;
  
          // Time node was elected primary
          OpTime electionTime;
  
          bool up() const { return health > 0; }
  
          /** health is set to -1 on startup.  that means we haven't even checked yet.  0 means we
           *  checked and it failed.
           */
          bool maybeUp() const { return health != 0; }
  
          /* true if changed in a way of interest to the repl set manager. */
          bool changed(const HeartbeatInfo& old) const;
  
          /**
           * Updates this with the info received from the command result we got from
           * the last replSetHeartbeat.
           */
          void updateFromLastPoll(const HeartbeatInfo& newInfo);
      private:
          unsigned _id;
      };
  
  } // namespace repl
  } // namespace mongo
  