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MXS-1937 Disable server events on master during switchover

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The feature is behind a config setting.
This commit is contained in:
Esa Korhonen
2018-08-31 18:14:50 +03:00
parent a0ea37b2c5
commit 7e6ce2d13f
5 changed files with 217 additions and 53 deletions
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41
server/modules/monitor/mariadbmon/mariadbserver.hh
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@ -193,6 +193,15 @@ public:
*/
std::unique_ptr<QueryResult> execute_query(const std::string& query, std::string* errmsg_out = NULL);
/**
* Execute a query which does not return data. If the query returns data, an error is returned.
*
* @param cmd The query
* @param errmsg_out Error output. Can be null.
* @return True on success, false on error or if query returned data
*/
bool execute_cmd(const std::string& cmd, std::string* errmsg_out = NULL);
/**
* Update server slave connection information.
*
@ -449,6 +458,20 @@ public:
*/
void set_status(uint64_t bits);
/**
* Disable any "ENABLED" events if event scheduler is enabled.
*
* @return True if successful
*/
bool disable_events();
/**
* Enable any "SLAVESIDE_DISABLED" events if event scheduler is enabled.
*
* @return True if successful
*/
bool enable_events();
private:
bool update_slave_status(std::string* errmsg_out = NULL);
bool sstatus_array_topology_equal(const SlaveStatusArray& new_slave_status);
@ -480,14 +503,21 @@ public:
*
* @return Current row index, or -1 if no data or next_row() has not been called yet.
*/
int64_t get_row_index() const;
int64_t get_current_row_index() const;
/**
* How many columns the result set has.
*
* @return Column count, or -1 if no data.
*/
int64_t get_column_count() const;
int64_t get_col_count() const;
/**
* How many rows does the result set have?
*
* @return The number of rows or -1 on error
*/
int64_t get_row_count() const;
/**
* Get a numeric index for a column name. May give wrong results if column names are not unique.
@ -523,9 +553,8 @@ public:
bool get_bool(int64_t column_ind) const;
private:
MYSQL_RES* m_resultset; // Underlying result set, freed at dtor.
MYSQL_RES* m_resultset = NULL; // Underlying result set, freed at dtor.
std::unordered_map<std::string, int64_t> m_col_indexes; // Map of column name -> index
int64_t m_columns; // How many columns does the data have. Usually equal to column index map size.
MYSQL_ROW m_rowdata; // Data for current row
int64_t m_current_row; // Index of current row
MYSQL_ROW m_rowdata = NULL; // Data for current row
int64_t m_current_row_ind = -1; // Index of current row
};