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 : public MessageInstance<MLog, PaxosServiceMessage> {
  24 public:
  25   friend factory;
  26
  27   uuid_d fsid;
  28   std::deque<LogEntry> entries;
  29
  30   MLog() : MessageInstance(MSG_LOG, 0) {}
  31   MLog(const uuid_d& f, const std::deque<LogEntry>& e)
  32     : MessageInstance(MSG_LOG, 0), fsid(f), entries(e) { }
  33   MLog(const uuid_d& f) : MessageInstance(MSG_LOG, 0), fsid(f) { }
  34 private:
  35   ~MLog() override {}
  36
  37 public:
  38   std::string_view get_type_name() const override { return "log"; }
  39   void print(ostream& out) const override {
  40     out << "log(";
  41     if (entries.size())
  42       out << entries.size() << " entries from seq " << entries.front().seq
  43           << " at " << entries.front().stamp;
  44     out << ")";
  45   }
  46
  47   void encode_payload(uint64_t features) override {
  48     using ceph::encode;
  49     paxos_encode();
  50     encode(fsid, payload);
  51     encode(entries, payload, features);
  52   }
  53   void decode_payload() override {
  54     auto p = payload.cbegin();
  55     paxos_decode(p);
  56     decode(fsid, p);
  57     decode(entries, p);
  58   }
  59 };
  60
  61 #endif