// handle a new connection:
// Steps:
// 1. Read input from connection line by line.
// 2. Parse each line into a metric.
// 3. Validate the metric
// 4. Process the metric.
func (d *Detector) handle(conn net.Conn) {
addr := conn.RemoteAddr()
health.IncrNumClients(1)
defer health.DecrNumClients(1)
log.Infof("conn %s established", addr)
scanner := bufio.NewScanner(conn)
for scanner.Scan() { // Read line by line.
if err := scanner.Err(); err != nil { // Close on read error.
log.Errorf("read error: %v, closing conn..", err)
break
}
line := scanner.Text()
m, err := parseMetric(line) // Parse
if err != nil {
log.Errorf("parse error: %v, skipping..", err)
continue
}
if err = m.Validate(); err != nil {
log.Errorf("invalid metric: %v, skipping..", err)
return
}
d.process(m, true)
}
conn.Close()
log.Infof("conn %s disconnected", addr)
}
// Handle a new connection, it will:
//
// 1. Read input from the connection line by line.
// 2. Parse the lines into metrics.
// 3. Validate the metrics.
//
func (d *Detector) handle(conn net.Conn) {
// New conn established.
addr := conn.RemoteAddr()
health.IncrNumClients(1)
log.Info("conn %s established", addr)
// Read
scanner := bufio.NewScanner(conn)
for scanner.Scan() {
// Read line by line.
if err := scanner.Err(); err != nil {
// Close conn on read error.
log.Error("read error: %v, closing conn..", err)
break
}
line := scanner.Text()
// Parse metric.
m, err := parseMetric(line)
if err != nil {
// Skip invalid input.
log.Error("parse error: %v, skipping..", err)
continue
}
// Validate metric.
if err := validateMetric(m); err != nil {
log.Error("invalid metric: %v, skipping..", err)
continue
}
// Process
d.process(m)
}
// Close conn.
conn.Close()
log.Info("conn %s disconnected", addr)
health.DecrNumClients(1)
}
