-
Notifications
You must be signed in to change notification settings - Fork 99
/
sender.go
114 lines (104 loc) · 2.62 KB
/
sender.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
package main
import (
"bytes"
"fmt"
"math/rand"
"net"
"sync/atomic"
"time"
log "github.com/sirupsen/logrus"
"github.com/atlassian/gostatsd"
)
// Metrics store the metrics to send.
type Metrics []*gostatsd.Metric
var metrics = &Metrics{
{
Name: "statsd.tester.counter",
Type: gostatsd.COUNTER,
},
{
Name: "statsd.tester.gauge",
Type: gostatsd.GAUGE,
},
{
Name: "statsd.tester.timer",
Type: gostatsd.TIMER,
},
{
Name: "statsd.tester.set",
Type: gostatsd.SET,
},
}
func (s *Server) write(conn net.Conn, buf *bytes.Buffer) {
_, err := buf.WriteTo(conn)
if err != nil {
log.Errorf("Error sending to statsd backend: %v", err)
}
atomic.AddInt64(&s.Stats.NumPackets, 1)
}
func (s *Server) writeLine(conn net.Conn, buf *bytes.Buffer, format, name string, value ...interface{}) {
_, _ = fmt.Fprintf(buf, format, value...)
atomic.AddInt64(&s.Stats.NumMetrics, 1)
// Make sure we don't go over max udp datagram size of 1500
if buf.Len() > s.MaxPacketSize {
log.Debugf("Buffer length: %d", buf.Len())
s.write(conn, buf)
buf.Reset()
}
}
func (s *Server) writeLines(conn net.Conn, buf *bytes.Buffer) {
for _, metric := range *metrics {
num := rand.Intn(10000) // Randomize metric name
switch metric.Type {
case gostatsd.COUNTER:
value := rand.Float64() * 100
s.writeLine(conn, buf, "%s%s_%d:%f|c\n", s.Namespace, metric.Name, num, value)
case gostatsd.TIMER:
n := rand.Intn(9) + 1
for i := 0; i < n; i++ {
value := rand.Float64() * 100
s.writeLine(conn, buf, "%s%s_%d:%f|ms\n", s.Namespace, metric.Name, num, value)
}
case gostatsd.GAUGE:
value := rand.Float64() * 100
s.writeLine(conn, buf, "%s%s_%d:%f|g\n", s.Namespace, metric.Name, num, value)
case gostatsd.SET:
for i := 0; i < 100; i++ {
value := rand.Intn(9) + 1
s.writeLine(conn, buf, "%s%s_%d:%d|s\n", s.Namespace, metric.Name, num, value)
}
}
}
}
func (s *Server) send() {
var flushTicker *time.Ticker
for {
select {
case <-s.start:
flushTicker = time.NewTicker(s.FlushInterval)
atomic.StoreInt64(&s.Stats.NumMetrics, 0)
atomic.StoreInt64(&s.Stats.NumPackets, 0)
s.Stats.StartTime = time.Now()
atomic.StoreInt32(&s.Started, 1)
go func() {
conn, err := net.Dial("udp", s.MetricsAddr)
if err != nil {
log.Panicf("Error connecting to statsd backend: %v", err)
}
defer conn.Close()
buf := new(bytes.Buffer)
for t := range flushTicker.C {
log.Debugf("Tick at %v", t)
s.writeLines(conn, buf)
if buf.Len() > 0 {
s.write(conn, buf)
}
}
}()
case <-s.stop:
atomic.StoreInt32(&s.Started, 0)
flushTicker.Stop()
s.gatherStats()
}
}
}