func NewSlowLogParser(file *os.File, stopChan <-chan bool, opt Options) *SlowLogParser {
// Seek to the offset, if any.
// @todo error if start off > file size
if opt.StartOffset > 0 {
// @todo handle error
file.Seek(int64(opt.StartOffset), os.SEEK_SET)
}
if opt.Debug {
l.SetFlags(l.Ltime | l.Lmicroseconds)
fmt.Println()
l.Println("parsing " + file.Name())
}
p := &SlowLogParser{
stopChan: stopChan,
opt: opt,
file: file,
EventChan: make(chan *log.Event),
inHeader: false,
inQuery: false,
headerLines: 0,
queryLines: 0,
bytesRead: opt.StartOffset,
lineOffset: 0,
event: log.NewEvent(),
}
return p
}
func (p *SlowLogParser) sendEvent(inHeader bool, inQuery bool) {
if p.opt.Debug {
l.Println("send event")
}
// Make a new event and reset our metadata.
defer func() {
p.event = log.NewEvent()
p.headerLines = 0
p.queryLines = 0
p.inHeader = inHeader
p.inQuery = inQuery
}()
if _, ok := p.event.TimeMetrics["Query_time"]; !ok {
if p.headerLines == 0 {
l.Panicf("No Query_time in event at %d: %#v", p.lineOffset, p.event)
}
// Started parsing in header after Query_time. Throw away event.
return
}
// Clean up the event.
p.event.Db = strings.TrimSuffix(p.event.Db, ";\n")
p.event.Query = strings.TrimSuffix(p.event.Query, ";")
// Send the event. This will block.
select {
case p.EventChan <- p.event:
case <-p.stopChan:
p.stopped = true
}
}