rpl_async_conn_failover_add_managed_udf.h

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/* Copyright (c) 2020, 2025, 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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   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
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   the program or referenced in the documentation.
 
   This program 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, version 2.0, for more details.
 
   You should have received a copy of the GNU General Public License
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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef RPL_ASYNC_CONN_FAILOVER_ADD_MANAGED_UDF_H
#define RPL_ASYNC_CONN_FAILOVER_ADD_MANAGED_UDF_H
 
#include "sql/udf_service_impl.h"
#include "sql/udf_service_util.h"
 
class Rpl_async_conn_failover_add_managed : public Udf_service_impl {
 private:
  Udf_charset_service m_charset_service;
  static constexpr const char *m_udf_name =
      "asynchronous_connection_failover_add_managed";
  bool m_initialized{false};
 
 public:
  Rpl_async_conn_failover_add_managed() = default;
  ~Rpl_async_conn_failover_add_managed() override = default;
 
  /**
    Initialize variables, acquires the mysql_service_mysql_udf_metadata from the
    registry service and register the Asynchronous Connection Failover's UDFs.
    If there is an error registering any UDF, all installed UDFs are
    unregistered.
 
    @retval true if there was an error
    @retval false if all UDFs were registered
   */
  bool init() override;
 
  /**
    Release the udf_metadata service.
 
    @retval false  Success
    @retval true   Failure. service could not be released
  */
  bool deinit();
 
  /**
    Add managed network configuration details
 
    @param[in] init_id     UDF_INIT structure
    @param[in] args       UDF_ARGS structure containing argument details
    @param[out] result    error message
    @param[out] length    error message length
    @param[out] is_null   if result is null
    @param[in,out] error  error code
 
    @return error message
  */
  static char *add_managed(UDF_INIT *init_id, UDF_ARGS *args, char *result,
                           unsigned long *length, unsigned char *is_null,
                           unsigned char *error);
 
  /**
    Initialize and verifies UDF's arguments. Also sets argument and result
    charset.
 
    @param[in] init_id     UDF_INIT structure
    @param[in] args       UDF_ARGS structure containing argument details
    @param[out] message   error message
 
    @return True if error, false otherwise.
  */
  static bool add_managed_init(UDF_INIT *init_id, UDF_ARGS *args,
                               char *message);
 
  /**
    Deinitialize variables initialized during init function.
 
    @param[in] init_id     UDF_INIT structure
  */
  static void add_managed_deinit(UDF_INIT *init_id);
};
#endif /* RPL_ASYNC_CONN_FAILOVER_ADD_MANAGED_UDF_H */