gr_message_service_example.h

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/* Copyright (c) 2019, 2022, 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,
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.
 
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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef GR_MESSAGE_SERVICE_EXAMPLE_H
#define GR_MESSAGE_SERVICE_EXAMPLE_H
 
#include <mysql/udf_registration_types.h>
 
/**
  @class GR_message_service_send_example
 
  An example implementation of a module that uses GR send service.
 */
 
class GR_message_service_send_example {
 public:
  /**
   UDF that will be called to send data to Group Replication send service.
 
   @return false success, true on failure.
   */
  static char *udf(UDF_INIT *, UDF_ARGS *args, char *result,
                   unsigned long *length, unsigned char *, unsigned char *);
 
  /**
   UDF initialization procedure.
 
   @return false success, true on failure.
   */
  static bool udf_init(UDF_INIT *init_id, UDF_ARGS *args, char *message);
 
  /**
    Register send method to send service message from GR.
 
    @return false success, true on failure.
  */
  bool register_example();
 
  /**
    Unregister send method, will not allow send service message from GR.
 
    @return false success, true on failure.
  */
  bool unregister_example();
};
 
/**
  This function register examples that uses services recv and send of Group
  replication.
 
  @return false success, true on failure.
 */
 
bool gr_service_message_example_init();
 
/**
  This function unregister examples that uses services recv and send of Group
  replication.
 
  @return false success, true on failure.
 */
 
bool gr_service_message_example_deinit();
 
#endif /* GR_MESSAGE_SERVICE_EXAMPLE_H */