// -*- 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) 2004-2006 Sage Weil <sage@newdream.net>
 *
 * 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.
 * 
 */

#ifndef CEPH_MDS_ESESSION_H
#define CEPH_MDS_ESESSION_H

#include "common/config.h"
#include "include/types.h"

#include "../LogEvent.h"

class ESession : public LogEvent {
 protected:
  entity_inst_t client_inst;
  bool open;    // open or close
  version_t cmapv;  // client map version

  interval_set<inodeno_t> inos;
  version_t inotablev;

  // Client metadata stored during open
  std::map<std::string, std::string> client_metadata;

 public:
  ESession() : LogEvent(EVENT_SESSION), open(false) { }
  ESession(const entity_inst_t& inst, bool o, version_t v,
      const std::map<std::string, std::string> &cm) :
    LogEvent(EVENT_SESSION),
    client_inst(inst),
    open(o),
    cmapv(v),
    inotablev(0),
    client_metadata(cm) {
  }
  ESession(const entity_inst_t& inst, bool o, version_t v,
	   const interval_set<inodeno_t>& i, version_t iv) :
    LogEvent(EVENT_SESSION),
    client_inst(inst),
    open(o),
    cmapv(v),
    inos(i), inotablev(iv) { }

  void encode(bufferlist& bl, uint64_t features) const;
  void decode(bufferlist::iterator& bl);
  void dump(Formatter *f) const;
  static void generate_test_instances(list<ESession*>& ls);

  void print(ostream& out) const {
    if (open)
      out << "ESession " << client_inst << " open cmapv " << cmapv;
    else
      out << "ESession " << client_inst << " close cmapv " << cmapv;
    if (inos.size())
      out << " (" << inos.size() << " inos, v" << inotablev << ")";
  }
  
  void update_segment();
  void replay(MDSRank *mds);
  entity_inst_t get_client_inst() const {return client_inst;}
};
WRITE_CLASS_ENCODER_FEATURES(ESession)

#endif
