ceph/src/mgr/MgrContext.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) 2016 John Spray <john.spray@redhat.com>
   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 #ifndef MGR_CONTEXT_H_
  15 #define MGR_CONTEXT_H_
  16
  17 #include <memory>
  18
  19 #include "common/ceph_json.h"
  20 #include "mon/MonClient.h"
  21
  22 class Command
  23 {
  24 protected:
  25   C_SaferCond cond;
  26 public:
  27   bufferlist outbl;
  28   std::string outs;
  29   int r;
  30
  31   void run(MonClient *monc, const std::string &command)
  32   {
  33     monc->start_mon_command({command}, {},
  34         &outbl, &outs, &cond);
  35   }
  36
  37   virtual void wait()
  38   {
  39     r = cond.wait();
  40   }
  41
  42   virtual ~Command() {}
  43 };
  44
  45
  46 class JSONCommand : public Command
  47 {
  48 public:
  49   json_spirit::mValue json_result;
  50
  51   void wait() override
  52   {
  53     Command::wait();
  54
  55     if (r == 0) {
  56       bool read_ok = json_spirit::read(
  57           outbl.to_str(), json_result);
  58       if (!read_ok) {
  59         r = -EINVAL;
  60       }
  61     }
  62   }
  63 };
  64
  65 #endif
  66