rpl_transaction_ctx.h

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/* Copyright (c) 2014, 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
   documentation.  The authors of MySQL hereby grant you an additional
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   This program is distributed in the hope that it will be useful,
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   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_TRANSACTION_CTX_H
#define RPL_TRANSACTION_CTX_H
 
#include "mysql/service_rpl_transaction_ctx.h"  // Transaction_termination_ctx
#include "sql/rpl_gtid.h"                       // rpl_gno
 
/**
  Server side support to provide a service to plugins to report if
  a given transaction should continue or be aborted.
  Its value is reset on Transaction_ctx::cleanup().
  Its value is set through service service_rpl_transaction_ctx.
*/
class Rpl_transaction_ctx {
 public:
  Rpl_transaction_ctx();
  virtual ~Rpl_transaction_ctx() = default;
 
  /**
    Set transaction context, that is, notify the server that for
    external reasons the ongoing transaction should continue or be
    aborted.
    See @file include/mysql/service_rpl_transaction_ctx.h
 
    @param transaction_termination_ctx  Transaction termination context
    @retval 0      success
    @retval !=0    error
  */
  int set_rpl_transaction_ctx(
      Transaction_termination_ctx transaction_termination_ctx);
 
  /**
    Get transaction outcome decision.
    When both sidno and gno are equal or greater than zero,
    transaction should continue.
    By default sidno and gno are 0, transaction will continue.
 
    @retval true      Transaction should abort
    @retval false     Transaction should continue
  */
  bool is_transaction_rollback();
 
  /**
    Was GTID generated externally?
 
    @retval true      GTID was generated.
    @retval false     GTID was not generated.
  */
  bool is_generated_gtid();
 
  /**
    Get transaction sidno.
 
    @return sidno sidno value.
  */
  int get_sidno();
 
  /**
    Get transaction gno.
 
    @return gno   gno value.
  */
  rpl_gno get_gno();
 
  /**
   Reset transaction context to default values.
  */
  void cleanup();
 
 private:
  Transaction_termination_ctx m_transaction_ctx;
};
 
#endif /* RPL_TRANSACTION_CTX_H */