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package boltjobs
import (
"bytes"
"encoding/gob"
"sync/atomic"
"time"
"github.com/spiral/roadrunner/v2/utils"
bolt "go.etcd.io/bbolt"
)
func (c *consumer) listener() {
tt := time.NewTicker(time.Millisecond)
defer tt.Stop()
for {
select {
case <-c.stopCh:
c.log.Info("boltdb listener stopped")
return
case <-tt.C:
if atomic.LoadUint64(c.active) > uint64(c.prefetch) {
time.Sleep(time.Second)
continue
}
tx, err := c.db.Begin(true)
if err != nil {
c.log.Error("failed to begin writable transaction, job will be read on the next attempt", "error", err)
continue
}
b := tx.Bucket(utils.AsBytes(PushBucket))
inQb := tx.Bucket(utils.AsBytes(InQueueBucket))
// get first item
k, v := b.Cursor().First()
if k == nil && v == nil {
_ = tx.Commit()
continue
}
buf := bytes.NewReader(v)
dec := gob.NewDecoder(buf)
item := &Item{}
err = dec.Decode(item)
if err != nil {
c.rollback(err, tx)
continue
}
err = inQb.Put(utils.AsBytes(item.ID()), v)
if err != nil {
c.rollback(err, tx)
continue
}
// delete key from the PushBucket
err = b.Delete(k)
if err != nil {
c.rollback(err, tx)
continue
}
err = tx.Commit()
if err != nil {
c.rollback(err, tx)
continue
}
// attach pointer to the DB
item.attachDB(c.db, c.active, c.delayed)
// as the last step, after commit, put the item into the PQ
c.pq.Insert(item)
}
}
}
func (c *consumer) delayedJobsListener() {
tt := time.NewTicker(time.Second)
defer tt.Stop()
// just some 90's
loc, err := time.LoadLocation("UTC")
if err != nil {
c.log.Error("failed to load location, delayed jobs won't work", "error", err)
return
}
var startDate = utils.AsBytes(time.Date(1990, 1, 1, 0, 0, 0, 0, loc).Format(time.RFC3339))
for {
select {
case <-c.stopCh:
c.log.Info("boltdb listener stopped")
return
case <-tt.C:
tx, err := c.db.Begin(true)
if err != nil {
c.log.Error("failed to begin writable transaction, job will be read on the next attempt", "error", err)
continue
}
delayB := tx.Bucket(utils.AsBytes(DelayBucket))
inQb := tx.Bucket(utils.AsBytes(InQueueBucket))
cursor := delayB.Cursor()
endDate := utils.AsBytes(time.Now().UTC().Format(time.RFC3339))
for k, v := cursor.Seek(startDate); k != nil && bytes.Compare(k, endDate) <= 0; k, v = cursor.Next() {
buf := bytes.NewReader(v)
dec := gob.NewDecoder(buf)
item := &Item{}
err = dec.Decode(item)
if err != nil {
c.rollback(err, tx)
continue
}
err = inQb.Put(utils.AsBytes(item.ID()), v)
if err != nil {
c.rollback(err, tx)
continue
}
// delete key from the PushBucket
err = delayB.Delete(k)
if err != nil {
c.rollback(err, tx)
continue
}
// attach pointer to the DB
item.attachDB(c.db, c.active, c.delayed)
// as the last step, after commit, put the item into the PQ
c.pq.Insert(item)
}
err = tx.Commit()
if err != nil {
c.rollback(err, tx)
continue
}
}
}
}
func (c *consumer) rollback(err error, tx *bolt.Tx) {
errR := tx.Rollback()
if errR != nil {
c.log.Error("transaction commit error, rollback failed", "error", err, "rollback error", errR)
}
c.log.Error("transaction commit error, rollback succeed", "error", err)
}
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