func buildFmter(logger *streamlog.StreamLogger) func(url.Values, interface{}) string {
type formatter interface {
Format(url.Values) string
}
return func(params url.Values, val interface{}) string {
fmter, ok := val.(formatter)
if !ok {
return fmt.Sprintf("Error: unexpected value of type %T in %s!", val, logger.Name())
}
return fmter.Format(params)
}
}
func newEventCatcher(logger *streamlog.StreamLogger) *eventCatcher {
catcher := &eventCatcher{
start: time.Now(),
logger: logger,
in: logger.Subscribe("endtoend"),
out: make(chan interface{}, 20),
}
go func() {
for event := range catcher.in {
endTime := event.(interface {
EventTime() time.Time
}).EventTime()
if endTime.Before(catcher.start) {
continue
}
catcher.out <- event
}
close(catcher.out)
}()
return catcher
}