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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2016 John Spray <john.spray@redhat.com>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*/
#include "include/Context.h"
#include "MgrMap.h"
#include "PaxosService.h"
class MgrMonitor : public PaxosService
{
MgrMap map;
MgrMap pending_map;
std::map<uint64_t, utime_t> last_beacon;
/**
* If a standby is available, make it active, given that
* there is currently no active daemon.
*
* @return true if a standby was promoted
*/
bool promote_standby();
void drop_active();
void drop_standby(uint64_t gid);
Context *digest_callback;
public:
MgrMonitor(Monitor *mn, Paxos *p, const string& service_name)
: PaxosService(mn, p, service_name), digest_callback(nullptr)
{}
void init();
void on_shutdown();
const MgrMap &get_map() const { return map; }
bool in_use() const { return map.epoch > 0; }
void create_initial();
void update_from_paxos(bool *need_bootstrap);
void create_pending();
void encode_pending(MonitorDBStore::TransactionRef t);
bool preprocess_query(MonOpRequestRef op);
bool prepare_update(MonOpRequestRef op);
bool preprocess_command(MonOpRequestRef op);
bool prepare_command(MonOpRequestRef op);
void encode_full(MonitorDBStore::TransactionRef t) { }
bool preprocess_beacon(MonOpRequestRef op);
bool prepare_beacon(MonOpRequestRef op);
void check_sub(Subscription *sub);
void check_subs();
void send_digests();
void tick();
void print_summary(Formatter *f, std::ostream *ss) const;
friend class C_Updated;
};
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