/
reap.go
119 lines (105 loc) · 2.89 KB
/
reap.go
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package pg
import (
"context"
"fmt"
"strconv"
"time"
"github.com/jmoiron/sqlx"
"github.com/jeffrom/job-manager/mjob/resource"
"github.com/jeffrom/job-manager/pkg/backend"
"github.com/jeffrom/job-manager/pkg/internal"
)
// Reap cleans up old jobs and queue versions.
func (pg *Postgres) Reap(ctx context.Context, cfg *backend.ReaperConfig) error {
if err := pg.ensureConn(ctx); err != nil {
return err
}
for {
if done, err := pg.reapOne(ctx); err != nil {
return err
} else if done {
return nil
}
internal.IgnoreError(internal.Sleep(ctx, 2*time.Second))
}
}
func (pg *Postgres) reapOne(ctx context.Context) (bool, error) {
now := internal.GetTimeProvider(ctx).Now().UTC()
tx, err := pg.db.BeginTxx(ctx, nil)
if err != nil {
return false, err
}
defer tx.Rollback()
q := "SELECT * FROM jobs WHERE enqueued_at < $1 ORDER BY id ASC LIMIT 50 FOR UPDATE SKIP LOCKED"
var rows []*resource.Job
err = sqlx.SelectContext(ctx, tx, &rows, q, now.Add(-pg.cfg.ReapAge))
if err != nil {
return false, err
}
if len(rows) == 0 {
return true, nil
}
for _, jb := range rows {
fmt.Println("reap", jb.ID)
if err := pg.deleteJobUniqueness(ctx, tx, jb); err != nil {
return false, err
}
if err := pg.deleteJobResults(ctx, tx, jb); err != nil {
return false, err
}
if err := pg.deleteJobClaims(ctx, tx, jb); err != nil {
return false, err
}
if err := pg.deleteJobCheckins(ctx, tx, jb); err != nil {
return false, err
}
}
if err := pg.deleteJobs(ctx, tx, rows); err != nil {
return false, err
}
return false, tx.Commit()
}
func (pg *Postgres) deleteJobUniqueness(ctx context.Context, tx *sqlx.Tx, jb *resource.Job) error {
key, err := jb.ArgKey()
if err != nil {
return err
}
q := "DELETE FROM job_uniqueness WHERE key = $1"
_, err = tx.ExecContext(ctx, q, []byte(key))
return err
}
func (pg *Postgres) deleteJobResults(ctx context.Context, tx *sqlx.Tx, jb *resource.Job) error {
q := "DELETE FROM job_results WHERE job_id = $1"
_, err := tx.ExecContext(ctx, q, jb.ID)
return err
}
func (pg *Postgres) deleteJobClaims(ctx context.Context, tx *sqlx.Tx, jb *resource.Job) error {
q := "DELETE FROM job_claims WHERE job_id = $1"
_, err := tx.ExecContext(ctx, q, jb.ID)
return err
}
func (pg *Postgres) deleteJobCheckins(ctx context.Context, tx *sqlx.Tx, jb *resource.Job) error {
q := "DELETE FROM job_checkins WHERE job_id = $1"
_, err := tx.ExecContext(ctx, q, jb.ID)
return err
}
func (pg *Postgres) deleteJobs(ctx context.Context, tx *sqlx.Tx, jobs []*resource.Job) error {
var args []interface{}
ids := make([]int64, len(jobs))
for i, jb := range jobs {
n, err := strconv.ParseInt(jb.ID, 10, 64)
if err != nil {
return err
}
ids[i] = n
}
args = append(args, ids)
q := "DELETE FROM jobs WHERE id IN (?)"
var err error
q, args, err = sqlx.In(q, args...)
if err != nil {
return err
}
_, err = tx.ExecContext(ctx, tx.Rebind(q), args...)
return err
}