109 lines
3.3 KiB
Objective-C
109 lines
3.3 KiB
Objective-C
/* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
|
|
|
|
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.
|
|
|
|
This program is also distributed with certain software (including
|
|
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
|
|
separately licensed software that they have included with MySQL.
|
|
|
|
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
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
|
|
|
|
#ifndef GCS_VIEW_MODIFICATION_NOTIFIER_INCLUDE
|
|
#define GCS_VIEW_MODIFICATION_NOTIFIER_INCLUDE
|
|
|
|
#include "plugin/group_replication/include/plugin_constants.h"
|
|
#include "plugin/group_replication/include/plugin_server_include.h"
|
|
|
|
/*
|
|
@class Plugin_gcs_view_modification_notifier
|
|
|
|
This class is used with the purpose of issuing a view changing event
|
|
and wait for its completion.
|
|
*/
|
|
class Plugin_gcs_view_modification_notifier {
|
|
public:
|
|
Plugin_gcs_view_modification_notifier();
|
|
virtual ~Plugin_gcs_view_modification_notifier();
|
|
|
|
/**
|
|
Signals that a view modification is about to start
|
|
*/
|
|
void start_view_modification();
|
|
|
|
/**
|
|
Checks if there is a view modification ongoing.
|
|
|
|
@return
|
|
@retval true there is a view modification ongoing
|
|
@retval false otherwise
|
|
*/
|
|
bool is_view_modification_ongoing();
|
|
|
|
/**
|
|
Signals that a view modification has ended
|
|
*/
|
|
void end_view_modification();
|
|
|
|
/**
|
|
Signals that a view modification has been cancelled
|
|
|
|
@param[in] errnr error that did cause the view modification to
|
|
be cancelled
|
|
*/
|
|
void cancel_view_modification(
|
|
int errnr = GROUP_REPLICATION_CONFIGURATION_ERROR);
|
|
|
|
/**
|
|
Check if view modification was cancelled.
|
|
This method must only be called after view modification is complete.
|
|
|
|
@return
|
|
@retval true view modification was cancelled
|
|
@retval false otherwise
|
|
*/
|
|
bool is_cancelled();
|
|
|
|
/**
|
|
Method in which one waits for the view modification to end
|
|
|
|
@param[in] timeout how long one wants to wait, in seconds
|
|
|
|
@return Operation status
|
|
@retval false OK
|
|
@retval true error (timeout or view modification cancelled)
|
|
*/
|
|
bool wait_for_view_modification(long timeout = VIEW_MODIFICATION_TIMEOUT);
|
|
|
|
/**
|
|
Get the error number that did happen on view modification.
|
|
This method must only be called after view modification is complete.
|
|
|
|
@return Operation
|
|
@retval 0 OK (no error)
|
|
@retval >0 error number
|
|
*/
|
|
int get_error();
|
|
|
|
private:
|
|
bool view_changing;
|
|
bool cancelled_view_change;
|
|
int error;
|
|
|
|
mysql_cond_t wait_for_view_cond;
|
|
mysql_mutex_t wait_for_view_mutex;
|
|
};
|
|
|
|
#endif /* GCS_VIEW_MODIFICATION_NOTIFIER_INCLUDE */
|