/
monitor.go
70 lines (60 loc) · 1.35 KB
/
monitor.go
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package monitoring
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"time"
"github.com/balchua/demo-jetstream/pkg/config"
"go.uber.org/zap"
)
type Monitor struct {
client *http.Client
baseURL string
config config.Monitor
}
func NewMonitor(monitorConfig config.Monitor, client *http.Client, baseURL string) *Monitor {
return &Monitor{
client: client,
baseURL: baseURL,
config: monitorConfig,
}
}
func (m *Monitor) StartMonitor() {
for {
m.doMonitor(m.config)
}
}
func (m *Monitor) doMonitor(mc config.Monitor) {
uri := fmt.Sprintf("%s/jsz?consumers=true", m.baseURL)
resp, err := m.client.Get(uri)
if err != nil {
zap.S().Errorf("%v", err)
return
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
jsz := &JSInfo{}
json.Unmarshal(body, jsz)
checkPendingMessages(jsz, mc)
time.Sleep(time.Duration(mc.PollSeconds) * time.Second)
}
func checkPendingMessages(jsz *JSInfo, mc config.Monitor) {
for _, d := range jsz.AccountDetails {
if d.Name == mc.Account {
if d.Streams != nil {
for _, s := range d.Streams {
for _, cons := range s.Consumers {
if cons.Stream == mc.StreamName && cons.Name == mc.ConsumerName {
totalLag := cons.NumPending + cons.NumAckPending
if totalLag > 0 {
zap.S().Infof("total lag is %d", totalLag)
break
}
}
}
}
}
}
}
}