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otsdbsub.go
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/
otsdbsub.go
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package openTSDBSubmitter
import (
"bosun.org/cmd/scollector/collectors"
"bosun.org/collect"
"bosun.org/opentsdb"
"bosun.org/slog"
"bytes"
"fmt"
"io"
"io/ioutil"
"net/http"
"time"
)
type Client struct {
opentsdbAddr string
updateChan chan *opentsdb.DataPoint
}
type Metric struct {
collectors.MetricMeta
client *Client
}
func (c *Client) NewMetric(m *collectors.MetricMeta) *Metric {
r := &Metric{
MetricMeta: *m,
client: c,
}
for k, v := range r.TagSet {
r.TagSet[k] = opentsdb.MustReplace(v, "_")
}
r.Metric = opentsdb.MustReplace(r.Metric, "_")
return r
}
func (m *Metric) Submit(value interface{}, timestamp time.Time) {
if m.client.opentsdbAddr == "" {
return
}
var rv interface{}
switch v := value.(type) {
case bool:
if v {
rv = int(1)
} else {
rv = int(0)
}
case time.Duration:
rv = v.Seconds() * 1e3
default:
rv = v
}
var md opentsdb.MultiDataPoint
if timestamp.IsZero() {
collectors.Add(&md, m.Metric, rv, m.TagSet, m.RateType, m.Unit, m.Desc)
} else {
ts := timestamp.UnixNano() / time.Millisecond.Nanoseconds()
collectors.AddTS(&md, m.Metric, ts, rv, m.TagSet, m.RateType, m.Unit, m.Desc)
}
for _, d := range md {
go func(d *opentsdb.DataPoint) {
m.client.updateChan <- d
}(d)
}
}
func NewClient(host string) *Client {
b := &Client{
opentsdbAddr: host,
updateChan: make(chan *opentsdb.DataPoint),
}
if b.opentsdbAddr == "" {
return b
}
go func() {
t := time.NewTicker(3 * time.Second)
dps := []*opentsdb.DataPoint{}
for {
select {
case dp := <-b.updateChan:
dps = append(dps, dp)
if len(dps) < 256 {
continue
}
case <-t.C:
if len(dps) <= 0 {
continue
}
}
err := sendDataPoints(dps, b.opentsdbAddr)
if err != nil {
slog.Errorf("Error sending data to opentsdb: %v", err)
continue
}
dps = []*opentsdb.DataPoint{}
}
}()
return b
}
func sendDataPoints(dps []*opentsdb.DataPoint, addr string) error {
resp, err := collect.SendDataPoints(dps, addr)
if err == nil {
defer resp.Body.Close()
defer io.Copy(ioutil.Discard, resp.Body)
}
if err != nil {
return err
}
// Some problem with connecting to the server; retry later.
if resp.StatusCode != http.StatusNoContent {
buf := new(bytes.Buffer)
buf.ReadFrom(resp.Body)
if resp.StatusCode == 400 && len(dps) > 1 { // bad datapoint, try each independently
for _, d := range dps {
err = sendDataPoints([]*opentsdb.DataPoint{d}, addr)
if err != nil {
slog.Errorf("bad opentsdb datapoint: %v", d)
}
}
return nil
}
return fmt.Errorf("bad status from opentsdb")
}
return nil
}