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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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/client/sdam/sdam_datatypes.h"
#include "mongo/db/repl/member_config.h"
#include "mongo/db/repl/repl_set_config.h"
#include "mongo/dbtests/mock/mock_remote_db_server.h"
#include <map>
#include <string>
#include <vector>
namespace mongo {
class ClockSource;
/**
* This is a helper class for managing a replica set consisting of
* MockRemoteDBServer instances.
*
* Note: Be sure to call ScopedDbConnection::clearPool() after every test
* when doing tests that involves the ReplicaSetMonitor. This is because
* it uses ScopedDbConnection which means you can have a residue connections
* that was created from previous tests and can cause a seg fault if the
* MockRemoteDBServer instances were already destroyed.
*
* Warning: Not thread-safe
*/
class MockReplicaSet {
public:
/**
* Creates a mock replica set and automatically mocks the isMaster and replSetGetStatus commands
* based on the default replica set configuration. Either the first node is primary and the
* others are secondaries, or all are secondaries. By default, hostnames begin with "$", which
* signals to ReplicaSetMonitor and to ConnectionString::connect that these are mocked hosts.
*
* @param setName The name for this replica set
* @param nodes The initial number of nodes for this replica set
* @param hasPrimary Whether the first node is primary or all are secondaries
* @param dollarPrefixHosts Whether hostnames should begin with "$"
*/
MockReplicaSet(const std::string& setName,
size_t nodes,
bool hasPrimary = true,
bool dollarPrefixHosts = true);
~MockReplicaSet();
//
// getters
//
std::string getSetName() const;
std::string getConnectionString() const;
MongoURI getURI() const;
std::vector<HostAndPort> getHosts() const;
repl::ReplSetConfig getReplConfig() const;
bool hasPrimary() const;
std::string getPrimary() const;
std::vector<std::string> getSecondaries() const;
/**
* Sets the configuration for this replica sets. This also has a side effect
* of mocking the ismaster and replSetGetStatus command responses based on
* the new config.
*
* Note: does not automatically select a new primary. Can be done manually by
* calling setPrimary.
*/
void setConfig(const repl::ReplSetConfig& newConfig);
/**
* Mark one of the config members as primary. Pass the empty string if all nodes are secondary.
*/
void setPrimary(const std::string& hostAndPort);
/**
* @return pointer to the mocked remote server with the given hostName.
* NULL if host doesn't exists.
*/
MockRemoteDBServer* getNode(const std::string& hostAndPort);
const MockRemoteDBServer* getNode(const std::string& hostAndPort) const;
/**
* Kills a node belonging to this set.
*
* @param hostName the name of the replica node to kill.
*/
void kill(const std::string& hostAndPort);
/**
* Kills a set of host belonging to this set.
*
* @param hostList the list of host names of the servers to kill.
*/
void kill(const std::vector<std::string>& hostList);
/**
* Reboots a node.
*
* @param hostName the name of the host to reboot.
*/
void restore(const std::string& hostName);
/**
* Returns a topology description reflecting the current state of this replica set.
*/
sdam::TopologyDescriptionPtr getTopologyDescription(ClockSource* clockSource) const;
private:
typedef std::map<std::string, MockRemoteDBServer*> ReplNodeMap;
/**
* Mocks the ismaster command based on the information on the current
* replica set configuration.
*/
void mockIsMasterCmd();
/**
* Mock the hello response for the given server.
*/
BSONObj mockHelloResponseFor(const MockRemoteDBServer& server) const;
/**
* Mocks the replSetGetStatus command based on the current states of the
* mocked servers.
*/
void mockReplSetGetStatusCmd();
/**
* @return the replica set state of the given host
*/
int getState(const std::string& hostAndPort) const;
const std::string _setName;
ReplNodeMap _nodeMap;
repl::ReplSetConfig _replConfig;
std::string _primaryHost;
};
} // namespace mongo
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