Auto-delete clients when FB returns UNREGISTERED

scnserver/jobs/requestLogCleanupJob.go

@@ -0,0 +1,116 @@
+package jobs
+
+import (
+	"blackforestbytes.com/simplecloudnotifier/logic"
+	"errors"
+	"fmt"
+	"github.com/rs/zerolog/log"
+	"gogs.mikescher.com/BlackForestBytes/goext/syncext"
+	"time"
+)
+
+type RequestLogCleanupJob struct {
+	app        *logic.Application
+	name       string
+	isRunning  *syncext.AtomicBool
+	isStarted  bool
+	sigChannel chan string
+}
+
+func NewRequestLogCleanupJob(app *logic.Application) *RequestLogCleanupJob {
+	return &RequestLogCleanupJob{
+		app:        app,
+		name:       "RequestLogCleanupJob",
+		isRunning:  syncext.NewAtomicBool(false),
+		isStarted:  false,
+		sigChannel: make(chan string, 1),
+	}
+}
+
+func (j *RequestLogCleanupJob) Start() error {
+	if j.isRunning.Get() {
+		return errors.New("job already running")
+	}
+	if j.isStarted {
+		return errors.New("job was already started") // re-start after stop is not allowed
+	}
+
+	j.isStarted = true
+
+	go j.mainLoop()
+
+	return nil
+}
+
+func (j *RequestLogCleanupJob) Stop() {
+	log.Info().Msg(fmt.Sprintf("Stopping Job [%s]", j.name))
+	if !syncext.WriteNonBlocking(j.sigChannel, "stop") {
+		log.Error().Msg(fmt.Sprintf("Failed to send Stop-Signal to Job [%s]", j.name))
+	}
+	j.isRunning.Wait(false)
+	log.Info().Msg(fmt.Sprintf("Stopped Job [%s]", j.name))
+}
+
+func (j *RequestLogCleanupJob) Running() bool {
+	return j.isRunning.Get()
+}
+
+func (j *RequestLogCleanupJob) mainLoop() {
+	j.isRunning.Set(true)
+
+	var err error = nil
+
+	for {
+		interval := 1 * time.Hour
+
+		signal, okay := syncext.ReadChannelWithTimeout(j.sigChannel, interval)
+		if okay {
+			if signal == "stop" {
+				log.Info().Msg(fmt.Sprintf("Job [%s] received <stop> signal", j.name))
+				break
+			} else if signal == "run" {
+				log.Info().Msg(fmt.Sprintf("Job [%s] received <run> signal", j.name))
+				continue
+			} else {
+				log.Error().Msg(fmt.Sprintf("Received unknown job signal: <%s> in job [%s]", signal, j.name))
+			}
+		}
+
+		log.Debug().Msg(fmt.Sprintf("Run job [%s]", j.name))
+
+		t0 := time.Now()
+		err = j.execute()
+		if err != nil {
+			log.Err(err).Msg(fmt.Sprintf("Failed to execute job [%s]: %s", j.name, err.Error()))
+		} else {
+			t1 := time.Now()
+			log.Debug().Msg(fmt.Sprintf("Job [%s] finished successfully after %f minutes", j.name, (t1.Sub(t0)).Minutes()))
+		}
+
+	}
+
+	log.Info().Msg(fmt.Sprintf("Job [%s] exiting main-loop", j.name))
+
+	j.isRunning.Set(false)
+}
+
+func (j *RequestLogCleanupJob) execute() (err error) {
+	defer func() {
+		if rec := recover(); rec != nil {
+			log.Error().Interface("recover", rec).Msg("Recovered panic in " + j.name)
+			err = errors.New(fmt.Sprintf("Panic recovered: %v", rec))
+		}
+	}()
+
+	ctx := j.app.NewSimpleTransactionContext(10 * time.Second)
+	defer ctx.Cancel()
+
+	deleted, err := j.app.Database.Requests.Cleanup(ctx, j.app.Config.ReqLogHistoryMaxCount, j.app.Config.ReqLogHistoryMaxDuration)
+	if err != nil {
+		return err
+	}
+
+	log.Warn().Msgf("Deleted %d entries from the request-log table", deleted)
+
+	return nil
+}