148 lines
4.0 KiB
C++
148 lines
4.0 KiB
C++
/* Copyright (c) 2017, 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 as published by
|
|
the Free Software Foundation; version 2 of the License.
|
|
|
|
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 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,
|
|
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
|
|
|
|
#ifndef GROUP_PARTITION_HANDLING_INCLUDE
|
|
#define GROUP_PARTITION_HANDLING_INCLUDE
|
|
|
|
#include "read_mode_handler.h"
|
|
#include "plugin_utils.h"
|
|
|
|
class Group_partition_handling
|
|
{
|
|
|
|
public:
|
|
|
|
Group_partition_handling(Shared_writelock *shared_stop_write_lock,
|
|
ulong unreachable_timeout);
|
|
|
|
/**
|
|
The class destructor
|
|
*/
|
|
virtual ~Group_partition_handling();
|
|
|
|
/**
|
|
The thread handler.
|
|
|
|
@return
|
|
@retval 0 OK
|
|
@retval !=0 Error
|
|
*/
|
|
int partition_thread_handler();
|
|
|
|
/**
|
|
Launch the partition thread handler
|
|
|
|
@return the operation status
|
|
@retval 0 OK
|
|
@retval !=0 Error
|
|
*/
|
|
int launch_partition_handler_thread();
|
|
|
|
/**
|
|
Terminate the partition thread handler
|
|
|
|
@return the operation status
|
|
@retval 0 OK
|
|
@retval !=0 Error
|
|
*/
|
|
int terminate_partition_handler_thread();
|
|
|
|
/**
|
|
Is the member currently/or was on a partition?
|
|
|
|
@note this flag is set to true whenever the partition handler is launched
|
|
and set to false whenever someone tries to abort it.
|
|
|
|
@return is member on partition, or was on one
|
|
@retval true yes
|
|
@retval false no
|
|
*/
|
|
bool is_member_on_partition();
|
|
|
|
/**
|
|
Is the partition handler thread running
|
|
@return true if running, false otherwise
|
|
*/
|
|
bool is_partition_handler_running();
|
|
|
|
/**
|
|
Updates the timeout when the member becomes unreachable.
|
|
|
|
@param unreachable_timeout The timeout before going into error
|
|
*/
|
|
void update_timeout_on_unreachable(ulong unreachable_timeout);
|
|
|
|
/**
|
|
@return the configured timeout
|
|
@retval 0 The partition thread wont run or timeout.
|
|
@retval >0 After this seconds the plugin will move to ERROR in a minority
|
|
*/
|
|
ulong get_timeout_on_unreachable();
|
|
|
|
/**
|
|
Signals the thread to abort the waiting process.
|
|
|
|
@return the operation status
|
|
@retval true It already killed pending transactions and left the group
|
|
@retval false The thread was not running, or was aborted in time.
|
|
*/
|
|
bool abort_partition_handler_if_running();
|
|
|
|
/**
|
|
@return is the process finished
|
|
@retval true It already killed pending transactions and left the group
|
|
@retval false The thread was not running, or was aborted.
|
|
*/
|
|
bool is_partition_handling_terminated();
|
|
|
|
private:
|
|
|
|
/**
|
|
Internal method that contains the logic for leaving and killing transactions
|
|
*/
|
|
void kill_transactions_and_leave();
|
|
|
|
//Group_partition_handling variables
|
|
|
|
/** Is member in partition */
|
|
bool member_in_partition;
|
|
|
|
/** Is the thread running */
|
|
bool thread_running;
|
|
|
|
/** Should we abort the process that will kill pending transaction */
|
|
bool partition_handling_aborted;
|
|
|
|
/** Did the partition handler terminate and killed pending transactions */
|
|
bool partition_handling_terminated;
|
|
|
|
/** The number of seconds until the member goes into error state*/
|
|
ulong timeout_on_unreachable;
|
|
|
|
/** The stop lock used when killing transaction/stopping server*/
|
|
Shared_writelock *shared_stop_write_lock;
|
|
|
|
/* Thread related structures */
|
|
|
|
my_thread_handle partition_trx_handler_pthd;
|
|
//run conditions and locks
|
|
mysql_mutex_t run_lock;
|
|
mysql_cond_t run_cond;
|
|
mysql_mutex_t trx_termination_aborted_lock;
|
|
mysql_cond_t trx_termination_aborted_cond;
|
|
};
|
|
|
|
#endif /* GROUP_PARTITION_HANDLING_INCLUDE */
|