func (c *collector) source(ins *visor.Instance) {
logFile := path.Join(c.logDir, ins.WorkerID(), "current")
t, err := NewFileTail(logFile)
if err != nil {
c.errc <- fmt.Errorf("collector: unable to source %d: %s", ins.ID, err)
return
}
s := NewSource(ins, t, c.pubc)
c.Add(s, t)
logf("collector: created source %d", ins.ID)
if err := <-s.Error(); err != nil {
c.errc <- err
return
}
c.lookup.Remove(s)
logf("collector: removed source %d", ins.ID)
}
func NewSource(ins *visor.Instance, tail Tailer, pubc chan<- Line) Source {
s := &source{
ins: ins,
errc: make(chan error, 1),
waitc: make(chan error),
stopc: make(chan chan error),
instanceID: strconv.FormatInt(ins.ID, 10),
topics: []string{
ins.ServiceName(),
ins.RevString(),
ins.EnvString(),
ins.RefString(),
},
}
go s.waitStop()
go s.loop(tail, pubc)
return s
}