ceph/src/messages/MLog.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15 #ifndef CEPH_MLOG_H
  16 #define CEPH_MLOG_H
  17
  18 #include "common/LogEntry.h"
  19 #include "messages/PaxosServiceMessage.h"
  20
  21 #include <deque>
  22
  23 class MLog final : public PaxosServiceMessage {
  24 public:
  25   uuid_d fsid;
  26   std::deque<LogEntry> entries;
  27
  28   MLog() : PaxosServiceMessage{MSG_LOG, 0} {}
  29   MLog(const uuid_d& f, std::deque<LogEntry>&& e)
  30     : PaxosServiceMessage{MSG_LOG, 0}, fsid(f), entries{std::move(e)} { }
  31   MLog(const uuid_d& f) : PaxosServiceMessage(MSG_LOG, 0), fsid(f) { }
  32 private:
  33   ~MLog() final {}
  34
  35 public:
  36   std::string_view get_type_name() const override { return "log"; }
  37   void print(std::ostream& out) const override {
  38     out << "log(";
  39     if (entries.size())
  40       out << entries.size() << " entries from seq " << entries.front().seq
  41           << " at " << entries.front().stamp;
  42     out << ")";
  43   }
  44
  45   void encode_payload(uint64_t features) override {
  46     using ceph::encode;
  47     paxos_encode();
  48     encode(fsid, payload);
  49     encode(entries, payload, features);
  50   }
  51   void decode_payload() override {
  52     using ceph::decode;
  53     auto p = payload.cbegin();
  54     paxos_decode(p);
  55     decode(fsid, p);
  56     decode(entries, p);
  57   }
  58 };
  59
  60 #endif