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|
package monitor
import (
"context"
"encoding/json"
"log"
"time"
"yaum/internal/alerts"
"yaum/internal/model"
"yaum/internal/sse"
"yaum/internal/store"
)
type checkResult struct {
Heartbeat model.Heartbeat
Service model.Service
}
type Worker struct {
store store.Store
interval time.Duration
timeout time.Duration
results chan checkResult
broadcaster *sse.Broadcaster
smtpCfg *alerts.SMTPConfig
quit chan struct{}
}
func NewWorker(s store.Store, interval, timeout time.Duration, b *sse.Broadcaster) *Worker {
return &Worker{
store: s,
interval: interval,
timeout: timeout,
results: make(chan checkResult, 100),
broadcaster: b,
quit: make(chan struct{}),
}
}
func (w *Worker) WithSMTP(cfg *alerts.SMTPConfig) *Worker {
w.smtpCfg = cfg
return w
}
func (w *Worker) Start(ctx context.Context) {
ticker := time.NewTicker(w.interval)
defer ticker.Stop()
log.Printf("[worker] iniciado | intervalo=%v timeout=%v", w.interval, w.timeout)
go w.resultConsumer()
w.runChecks(ctx)
for {
select {
case <-ticker.C:
w.runChecks(ctx)
case <-w.quit:
log.Println("[worker] encerrando...")
return
}
}
}
func (w *Worker) resultConsumer() {
for {
select {
case res := <-w.results:
hb := res.Heartbeat
svc := res.Service
w.checkTransition(svc, hb)
if err := w.store.AddHeartbeat(hb); err != nil {
log.Printf("[worker] erro ao salvar heartbeat: %v", err)
}
if w.broadcaster != nil {
data, err := json.Marshal(hb)
if err == nil {
w.broadcaster.Publish(data)
}
}
status := "UP"
if !hb.IsUp {
status = "DOWN"
}
log.Printf("[worker] service=%d status=%s code=%d time=%dms",
hb.ServiceID, status, hb.StatusCode, hb.ResponseTimeMs)
case <-w.quit:
return
}
}
}
func (w *Worker) checkTransition(svc model.Service, hb model.Heartbeat) {
prev, err := w.store.GetLastHeartbeat(svc.ID)
if err != nil || prev == nil {
return
}
if prev.IsUp == hb.IsUp {
return
}
log.Printf("[worker] transicao de status service=%d: %v -> %v", svc.ID, prev.IsUp, hb.IsUp)
w.fireAlerts(svc, hb, prev.IsUp)
}
func (w *Worker) fireAlerts(svc model.Service, hb model.Heartbeat, wasUp bool) {
if svc.DiscordWebhookURL != "" {
go alerts.SendDiscord(svc.DiscordWebhookURL, svc, hb, wasUp)
}
if svc.AlertEmail != "" && w.smtpCfg != nil {
go alerts.SendEmail(svc, hb, wasUp, w.smtpCfg)
}
}
func (w *Worker) runChecks(ctx context.Context) {
services, err := w.store.ListActiveServices()
if err != nil {
log.Printf("[worker] erro ao listar servicos ativos: %v", err)
return
}
log.Printf("[worker] verificando %d servico(s)", len(services))
for _, svc := range services {
go w.checkService(ctx, svc)
}
}
func (w *Worker) checkService(ctx context.Context, svc model.Service) {
checkCtx, cancel := context.WithTimeout(ctx, w.timeout)
defer cancel()
hb := CheckHTTP(checkCtx, svc.URL, svc.KeywordToFind)
hb.ServiceID = svc.ID
w.results <- checkResult{Heartbeat: hb, Service: svc}
}
func (w *Worker) Stop() {
close(w.quit)
}
|
