// drainChannel reads non-empty log lines from a channel (until it is closed),
// extracts logging metadata from them (severity, timestamp, etc) via given
// parser and pushes log entries to the push buffer. Doesn't return errors: use
// buf.Stop() to check for any errors during sending.
func drainChannel(src chan string, parser LogParser, buf PushBuffer, logger logging.Logger) {
for line := range src {
line = strings.TrimSpace(line)
if line == "" {
continue
}
entry := parser.ParseLogLine(line)
if entry == nil {
if logger != nil {
logger.Errorf("skipping line, unrecognized format: %s", line)
}
continue
}
if entry.InsertID == "" {
insertID, err := computeInsertID(entry)
if err != nil {
if logger != nil {
logger.Errorf("skipping line, can't compute insertId: %s", err)
}
continue
}
entry.InsertID = insertID
}
buf.Add(*entry)
}
}
