component_status_var_service_imp.h

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/* Copyright (c) 2017, 2023, Oracle and/or its affiliates.
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
 
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as designated in a particular file or component or in included license
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef COMPONENT_STAUTS_VARIABLE_SERVICE_H
#define COMPONENT_STAUTS_VARIABLE_SERVICE_H
 
#include <mysql/components/service_implementation.h>
#include <mysql/components/services/component_status_var_service.h>
#include <mysql/status_var.h>
 
extern bool add_status_vars(const SHOW_VAR *);
extern void remove_status_vars(SHOW_VAR *);
 
/**
  An implementation of the component status variables Service to register
  variable and unregister variable.
*/
class mysql_status_variable_registration_imp {
 public:
  /**
    Register status variable.
 
    @param  status_var fully constructed status variable object.
    @return Status of performed operation
    @retval false success
    @retval true failure
 
    Note: Please see the components/test/test_status_var_service.cc file,
    to know how to construct status variables for different variable types.
  */
  static DEFINE_BOOL_METHOD(register_variable, (SHOW_VAR * status_var));
 
  /**
    Unregister's status variable.
    @param  status_var SHOW_VAR object with only the name of the variable,
                       which has to be removed from the global list.
    @return Status of performed operation
    @retval false success
    @retval true failure
  */
  static DEFINE_BOOL_METHOD(unregister_variable, (SHOW_VAR * status_var));
};
#endif /* COMPONENT_STATUS_VARIABLE_SERVICE_H */