Golang Mysqld.MasterStatus Examples

Example #1

File: rowcache_invalidator.go Project: qman1989/vitess

// Open runs the invalidation loop.
func (rci *RowcacheInvalidator) Open(dbname string, mysqld *mysqlctl.Mysqld) {
	rp, err := mysqld.MasterStatus()
	if err != nil {
		panic(NewTabletError(FATAL, "Rowcache invalidator aborting: cannot determine replication position: %v", err))
	}
	if mysqld.Cnf().BinLogPath == "" {
		panic(NewTabletError(FATAL, "Rowcache invalidator aborting: binlog path not specified"))
	}

	ok := rci.svm.Go(func(_ *sync2.ServiceManager) {
		rci.mu.Lock()
		rci.dbname = dbname
		rci.mysqld = mysqld
		rci.evs = binlog.NewEventStreamer(dbname, mysqld.Cnf().BinLogPath)
		rci.GroupId.Set(rp.MasterLogGroupId)
		rci.mu.Unlock()

		rci.run()

		rci.mu.Lock()
		rci.evs = nil
		rci.mu.Unlock()
	})
	if ok {
		log.Infof("Rowcache invalidator starting, dbname: %s, path: %s, logfile: %s, position: %d", dbname, mysqld.Cnf().BinLogPath, rp.MasterLogFile, rp.MasterLogPosition)
	} else {
		log.Infof("Rowcache invalidator already running")
	}
}