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
|
package main
import (
"fmt"
"log"
"net/http"
"net/url"
)
// metricHandler prints all the metrics to the ResponseWriter
func metricHandler(w http.ResponseWriter, r *http.Request) {
var metricsString string
metricsString += fmt.Sprintf("nr_galaxies %d\n", len(treeArray))
for i := 0; i < len(starCount); i++ {
metricsString += fmt.Sprintf("galaxy_star_count{galaxy_nr=\"%d\"} %d\n", i, starCount[i])
}
for i := 0; i < len(errorCount); i++ {
metricsString += fmt.Sprintf("galaxy_error_count{galaxy_nr=\"%d\"} %d\n", i, errorCount[i])
}
log.Println(metricsString)
_, _ = fmt.Fprintf(w, metricsString)
}
// pushMetricsNumOfStars pushes the amount of stars in the given galaxy with the given index to the given host
// the host is (normally) the service bundling the metrics
func pushMetricsNumOfStars(host string, treeindex int64) {
// define a post-request and send it to the given host
requestURL := fmt.Sprintf("%s", host)
resp, err := http.PostForm(requestURL,
url.Values{
"key": {fmt.Sprintf("db_%s{nr=\"%s\"}", "stars_num", treeindex)},
"value": {fmt.Sprintf("%d", starCount[treeindex])},
},
)
if err != nil {
fmt.Printf("Cound not make a POST request to %s", requestURL)
}
// close the response body
defer resp.Body.Close()
}
|
