func (s *WorkerTestSuite) TestIter(t *C) {
tickChan := make(chan time.Time, 1)
i := perfschema.NewIter(pct.NewLogger(s.logChan, "iter"), tickChan)
t.Assert(i, NotNil)
iterChan := i.IntervalChan()
t.Assert(iterChan, NotNil)
i.Start()
defer i.Stop()
t1, _ := time.Parse("2006-01-02 15:04:05", "2015-01-01 00:01:00")
t2, _ := time.Parse("2006-01-02 15:04:05", "2015-01-01 00:02:00")
t3, _ := time.Parse("2006-01-02 15:04:05", "2015-01-01 00:03:00")
tickChan <- t1
got := <-iterChan
t.Check(got, DeepEquals, &qan.Interval{Number: 1, StartTime: time.Time{}, StopTime: t1})
tickChan <- t2
got = <-iterChan
t.Check(got, DeepEquals, &qan.Interval{Number: 2, StartTime: t1, StopTime: t2})
tickChan <- t3
got = <-iterChan
t.Check(got, DeepEquals, &qan.Interval{Number: 3, StartTime: t2, StopTime: t3})
}
func (f *RealIntervalIterFactory) Make(analyzerType string, mysqlConn mysql.Connector, tickChan chan time.Time) qan.IntervalIter {
switch analyzerType {
case "slowlog":
// The interval iter gets the slow log file (@@global.slow_query_log_file)
// every tick because it can change (not typical, but possible). If it changes,
// the start offset is reset to 0 for the new file.
getSlowLogFunc := func() (string, error) {
if err := mysqlConn.Connect(1); err != nil {
return "", err
}
defer mysqlConn.Close()
// Slow log file can be absolute or relative. If it's relative,
// then prepend the datadir.
dataDir := mysqlConn.GetGlobalVarString("datadir")
filename := AbsDataFile(dataDir, mysqlConn.GetGlobalVarString("slow_query_log_file"))
return filename, nil
}
return slowlog.NewIter(pct.NewLogger(f.logChan, "qan-interval"), getSlowLogFunc, tickChan)
case "perfschema":
return perfschema.NewIter(pct.NewLogger(f.logChan, "qan-interval"), tickChan)
default:
panic("Invalid analyzerType: " + analyzerType)
}
}