mirror of
https://github.com/ceph/ceph
synced 2024-12-25 21:03:31 +00:00
112 lines
2.3 KiB
C++
112 lines
2.3 KiB
C++
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
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// vim: ts=8 sw=2 smarttab
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/*
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* Ceph - scalable distributed file system
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*
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* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
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*
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* This is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software
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* Foundation. See file COPYING.
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*
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*/
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#ifndef CEPH_LOGEVENT_H
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#define CEPH_LOGEVENT_H
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#define EVENT_STRING 1
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#define EVENT_SUBTREEMAP 2
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#define EVENT_EXPORT 3
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#define EVENT_IMPORTSTART 4
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#define EVENT_IMPORTFINISH 5
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#define EVENT_FRAGMENT 6
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#define EVENT_RESETJOURNAL 9
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#define EVENT_SESSION 10
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#define EVENT_SESSIONS 11
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#define EVENT_UPDATE 20
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#define EVENT_SLAVEUPDATE 21
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#define EVENT_OPEN 22
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#define EVENT_COMMITTED 23
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#define EVENT_TABLECLIENT 42
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#define EVENT_TABLESERVER 43
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#define EVENT_SUBTREEMAP_TEST 50
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#include <string>
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using namespace std;
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#include "include/buffer.h"
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#include "include/Context.h"
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#include "include/utime.h"
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class MDS;
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class LogSegment;
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// generic log event
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class LogEvent {
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private:
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__u32 _type;
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uint64_t _start_off;
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protected:
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utime_t stamp;
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friend class MDLog;
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public:
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LogSegment *_segment;
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LogEvent(int t)
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: _type(t), _start_off(0), _segment(0) { }
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virtual ~LogEvent() { }
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int get_type() const { return _type; }
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void set_type(int t) { _type = t; }
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uint64_t get_start_off() const { return _start_off; }
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void set_start_off(uint64_t o) { _start_off = o; }
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utime_t get_stamp() const { return stamp; }
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void set_stamp(utime_t t) { stamp = t; }
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// encoding
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virtual void encode(bufferlist& bl) const = 0;
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virtual void decode(bufferlist::iterator &bl) = 0;
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static LogEvent *decode(bufferlist &bl);
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void encode_with_header(bufferlist& bl) {
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::encode(_type, bl);
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encode(bl);
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}
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virtual void print(ostream& out) {
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out << "event(" << _type << ")";
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}
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/*** live journal ***/
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/* update_segment() - adjust any state we need to in the LogSegment
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*/
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virtual void update_segment() { }
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/*** recovery ***/
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/* replay() - replay given event. this is idempotent.
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*/
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virtual void replay(MDS *m) { assert(0); }
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};
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inline ostream& operator<<(ostream& out, LogEvent& le) {
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le.print(out);
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return out;
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}
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#endif
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