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backgroundworker.go
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backgroundworker.go
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package scheduledevents2
import (
"context"
"fmt"
"strconv"
"sync"
"time"
"emperror.dev/errors"
"github.com/botlabs-gg/yagpdb/common"
"github.com/botlabs-gg/yagpdb/common/backgroundworkers"
"github.com/botlabs-gg/yagpdb/common/scheduledevents2/models"
"github.com/mediocregopher/radix/v3"
"github.com/volatiletech/sqlboiler/queries/qm"
)
const flushTresholdMinutes = 5
var _ backgroundworkers.BackgroundWorkerPlugin = (*ScheduledEvents)(nil)
func (p *ScheduledEvents) RunBackgroundWorker() {
go p.SecondaryCleaner()
checkNewEvents := time.NewTicker(time.Minute)
for {
select {
case wg := <-p.stopBGWorker:
wg.Done()
return
case <-checkNewEvents.C:
logger.Info("Flushing new events...")
err := runFlushNewEvents()
if err != nil {
logger.WithError(err).Error("failed moving scheduled events into redis")
}
logger.Info("DONE flushing new events...")
}
}
}
func (p *ScheduledEvents) SecondaryCleaner() {
// dont want our cleanup jobs interfering with our other jobs
cleanupTicker := time.NewTicker(time.Hour)
cleanupRecentTicker := time.NewTicker(time.Minute)
for {
select {
case wg := <-p.stopBGWorker:
wg.Done()
return
case <-cleanupTicker.C:
logger.Info("running generic cleanup...")
runCleanup()
logger.Info("DONE running generic cleanup...")
case <-cleanupRecentTicker.C:
logger.Info("cleaning up recent events...")
err := cleanupRecent()
if err != nil {
logger.WithError(err).Error("failed cleaning up recent scheduled events")
}
logger.Info("DONE cleaning up recent events...")
}
}
}
func runCleanup() {
n, err := models.ScheduledEvents(qm.Where("processed=true")).DeleteAll(context.Background(), common.PQ)
if err != nil {
logger.WithError(err).Error("error running cleanup")
} else {
logger.Println("cleaned up ", n, " entries")
}
}
func runFlushNewEvents() error {
where := qm.Where(fmt.Sprintf("triggers_at < now() + INTERVAL '%d minutes' AND processed=false", flushTresholdMinutes))
eventsTriggeringSoon, err := models.ScheduledEvents(where).AllG(context.Background())
if err != nil {
return errors.WithStackIf(err)
}
err = common.RedisPool.Do(radix.WithConn("a", func(c radix.Conn) error {
for _, v := range eventsTriggeringSoon {
isDone := false
c.Do(radix.FlatCmd(&isDone, "SISMEMBER", "recently_done_scheduled_events", v.ID))
if isDone {
continue
}
err := flushEventToRedis(c, v)
if err != nil {
return err
}
}
return nil
}))
return err
}
// flushEventToRedis flushes an event to redis, this is done as a performance improvement as the postgres db is only queried as often
func flushEventToRedis(c radix.Client, evt *models.ScheduledEvent) error {
v := fmt.Sprintf("%d:%d", evt.ID, evt.GuildID)
err := c.Do(radix.Cmd(nil, "ZADD", "scheduled_events_soon", strconv.FormatInt(evt.TriggersAt.UTC().UnixMicro(), 10), v))
if err != nil {
return err
}
return nil
}
// UpdateFlushedEvent updates a already flushed event by either removing it if its above the treshold, or updating the score
func UpdateFlushedEvent(t time.Time, c radix.Client, evt *models.ScheduledEvent) error {
delta := evt.TriggersAt.Sub(t)
if delta < flushTresholdMinutes*time.Minute {
return flushEventToRedis(c, evt)
}
// otherwise delete it
err := c.Do(radix.Cmd(nil, "ZREM", "scheduled_events_soon", fmt.Sprintf("%d:%d", evt.ID, evt.GuildID)))
return err
}
func (p *ScheduledEvents) StopBackgroundWorker(wg *sync.WaitGroup) {
p.stopBGWorker <- wg
}
func cleanupRecent() error {
var recent []int64
err := common.RedisPool.Do(radix.Cmd(&recent, "SMEMBERS", "recently_done_scheduled_events"))
if err != nil {
return err
}
if len(recent) < 1 {
return nil
}
logger.Infof("got %d recent events to clean up...", len(recent))
if len(recent) < 100 {
return cleanupRecentBatch(recent)
}
i := 0
for {
var batch []int64
if i+100 >= len(recent) {
batch = recent[i:]
} else {
batch = recent[i : i+100]
}
err := cleanupRecentBatch(batch)
if err != nil {
return err
}
i += 100
if i >= len(recent) {
break
}
}
return nil
}
func cleanupRecentBatch(ids []int64) error {
sqlArgs := make([]interface{}, len(ids))
for i, v := range ids {
sqlArgs[i] = v
}
result, err := models.ScheduledEvents(qm.WhereIn("id in ?", sqlArgs...)).DeleteAll(context.Background(), common.PQ)
if err != nil {
return err
}
logger.Infof("Deleted %d recently done events", result)
args := make([]string, len(ids)+1)
for i, v := range ids {
args[i+1] = strconv.FormatInt(v, 10)
}
args[0] = "recently_done_scheduled_events"
return common.RedisPool.Do(radix.Cmd(nil, "SREM", args...))
}