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/*
* Copyright (C) 2014 MongoDB 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 "mongo/bson/optime.h"
#include "mongo/db/repl/member_state.h"
#include "mongo/db/repl/repl_set_heartbeat_response.h"
#include "mongo/util/time_support.h"
namespace mongo {
namespace repl {
/**
* This class contains the data returned from a heartbeat command for one member
* of a replica set.
**/
class MemberHeartbeatData {
public:
MemberHeartbeatData();
MemberState getState() const { return _lastResponse.getState(); }
int getHealth() const { return _health; }
Date_t getUpSince() const { return _upSince; }
Date_t getLastHeartbeat() const { return _lastHeartbeat; }
Date_t getLastHeartbeatRecv() const { return _lastHeartbeatRecv; }
void setLastHeartbeatRecv(Date_t newHeartbeatRecvTime) {
_lastHeartbeatRecv = newHeartbeatRecvTime;
}
const std::string& getLastHeartbeatMsg() const { return _lastResponse.getHbMsg(); }
const std::string& getSyncSource() const { return _lastResponse.getSyncingTo(); }
OpTime getOpTime() const { return _lastResponse.getOpTime(); }
int getConfigVersion() const { return _lastResponse.getVersion(); }
bool hasAuthIssue() const { return _authIssue; }
OpTime getElectionTime() const { return _lastResponse.getElectionTime(); }
// Returns true if the last heartbeat data explicilty stated that the node
// is not electable.
bool isUnelectable() const {
return _lastResponse.hasIsElectable() && !_lastResponse.isElectable();
}
// Was this member up for the last heartbeat?
bool up() const { return _health > 0; }
// Was this member up for the last hearbeeat
// (or we haven't received the first heartbeat yet)
bool maybeUp() const { return _health != 0; }
/**
* Sets values in this object from the results of a successful heartbeat command.
*/
void setUpValues(Date_t now, const HostAndPort& host, ReplSetHeartbeatResponse hbResponse);
/**
* Sets values in this object from the results of a erroring/failed heartbeat command.
* _authIssues is set to false, _health is set to 0, _state is set to RS_DOWN, and
* other values are set as specified.
*/
void setDownValues(Date_t now, const std::string& heartbeatMessage);
/**
* Sets values in this object that indicate there was an auth issue on the last heartbeat
* command.
*/
void setAuthIssue(Date_t now);
private:
// -1 = not checked yet, 0 = member is down/unreachable, 1 = member is up
int _health;
// Time of first successful heartbeat, if currently still up
Date_t _upSince;
// This is the last time we got a response from a heartbeat request to a given member.
Date_t _lastHeartbeat;
// This is the last time we got a heartbeat request from a given member.
Date_t _lastHeartbeatRecv;
// Did the last heartbeat show a failure to authenticate?
bool _authIssue;
// The last heartbeat response we received.
ReplSetHeartbeatResponse _lastResponse;
};
} // namespace repl
} // namespace mongo
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