applier_channel_state_observer.h

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/* Copyright (c) 2015, 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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   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 APPLIER_CHANNEL_STATE_OBSERVER_INCLUDE
#define APPLIER_CHANNEL_STATE_OBSERVER_INCLUDE
 
#include "my_inttypes.h"
#include "plugin/group_replication/include/plugin_observers/channel_observation_manager.h"
 
class Applier_channel_state_observer : public Channel_state_observer {
 public:
  Applier_channel_state_observer();
 
  /** Observer for receiver thread starts */
  int thread_start(Binlog_relay_IO_param *param) override;
 
  /** Observer for receiver thread stops */
  int thread_stop(Binlog_relay_IO_param *param) override;
 
  /** Observer for applier thread starts */
  int applier_start(Binlog_relay_IO_param *param) override;
 
  /** Observer for applier thread stops */
  int applier_stop(Binlog_relay_IO_param *param, bool aborted) override;
 
  /**  Observer for when a new transmission from a another server is requested*/
  int before_request_transmit(Binlog_relay_IO_param *param,
                              uint32 flags) override;
 
  /** Observer for whenever a event is read by the receiver thread*/
  int after_read_event(Binlog_relay_IO_param *param, const char *packet,
                       unsigned long len, const char **event_buf,
                       unsigned long *event_len) override;
 
  /** Observer for whenever a event is queued by the receiver thread*/
  int after_queue_event(Binlog_relay_IO_param *param, const char *event_buf,
                        unsigned long event_len, uint32 flags) override;
 
  /** Observer for whenever a reset slave is executed */
  int after_reset_slave(Binlog_relay_IO_param *param) override;
 
  /** Observer for applier log event */
  int applier_log_event(Binlog_relay_IO_param *param, Trans_param *trans_param,
                        int &out) override;
};
 
#endif /* APPLIER_CHANNEL_STATE_OBSERVER_INCLUDE */