SystemState.h

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/* -*- c++ -*-
 * Copyright (C) 2007-2015 Hypertable, Inc.
 *
 * This file is part of Hypertable.
 *
 * Hypertable is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; version 3 of the
 * License, or any later version.
 *
 * Hypertable is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#ifndef Hypertable_Master_SystemState_h
#define Hypertable_Master_SystemState_h

#include <vector>

#include "Hypertable/Lib/MetaLogEntity.h"
#include "Hypertable/Lib/SystemVariable.h"

#include "NotificationMessage.h"

namespace Hypertable {

  class SystemState : public MetaLog::Entity {
  public:

    SystemState();

    SystemState(const MetaLog::EntityHeader &header_);

    virtual ~SystemState() { }

    bool admin_set(const std::vector<SystemVariable::Spec> &specs);

    bool admin_set(int code, bool value);

    bool auto_set(int code, bool value, const String &reason);

    void get(std::vector<SystemVariable::Spec> &specs, uint64_t *generation);

    bool get_notifications(std::vector<NotificationMessage> &notifications);

    void get_non_default(std::vector<SystemVariable::Spec> &specs,
                         uint64_t *generation=0);

    const String name() override { return "SystemState"; }

    void display(std::ostream &os) override;

    void decode(const uint8_t **bufp, size_t *remainp,
                uint16_t definition_version) override;

  private:

    uint8_t encoding_version() const override;

    size_t encoded_length_internal() const override;

    void encode_internal(uint8_t **bufp) const override;

    void decode_internal(uint8_t version, const uint8_t **bufp,
                         size_t *remainp) override;

    void decode_old(const uint8_t **bufp, size_t *remainp);

    uint64_t m_generation;

    std::vector<SystemVariable::Spec> m_admin_specified;

    std::vector<int32_t> m_admin_last_notification;

    std::vector<SystemVariable::Spec> m_auto_specified;

    std::vector<int32_t> m_auto_last_notification;

    std::vector<NotificationMessage> m_notifications;

    int32_t m_notification_interval;
  };

  typedef std::shared_ptr<SystemState> SystemStatePtr;

}

#endif // Hypertable_Master_SystemState_h