storj/satellite/satellitedb/repairqueue.go
2019-07-25 17:01:44 +02:00

120 lines
3.4 KiB
Go

// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.
package satellitedb
import (
"context"
"database/sql"
"fmt"
"github.com/lib/pq"
sqlite3 "github.com/mattn/go-sqlite3"
"storj.io/storj/internal/dbutil/pgutil"
"storj.io/storj/internal/dbutil/sqliteutil"
"storj.io/storj/pkg/pb"
dbx "storj.io/storj/satellite/satellitedb/dbx"
"storj.io/storj/storage"
)
type repairQueue struct {
db *dbx.DB
}
func (r *repairQueue) Insert(ctx context.Context, seg *pb.InjuredSegment) (err error) {
defer mon.Task()(&ctx)(&err)
_, err = r.db.ExecContext(ctx, r.db.Rebind(`INSERT INTO injuredsegments ( path, data ) VALUES ( ?, ? )`), seg.Path, seg)
if err != nil {
if pgutil.IsConstraintError(err) || sqliteutil.IsConstraintError(err) {
return nil // quietly fail on reinsert
}
return err
}
return nil
}
func (r *repairQueue) postgresSelect(ctx context.Context) (seg *pb.InjuredSegment, err error) {
defer mon.Task()(&ctx)(&err)
err = r.db.QueryRowContext(ctx, `
UPDATE injuredsegments SET attempted = timezone('utc', now()) WHERE path = (
SELECT path FROM injuredsegments
WHERE attempted IS NULL OR attempted < timezone('utc', now()) - interval '1 hour'
ORDER BY attempted NULLS FIRST FOR UPDATE SKIP LOCKED LIMIT 1
) RETURNING data`).Scan(&seg)
if err == sql.ErrNoRows {
err = storage.ErrEmptyQueue.New("")
}
return
}
func (r *repairQueue) sqliteSelect(ctx context.Context) (seg *pb.InjuredSegment, err error) {
defer mon.Task()(&ctx)(&err)
err = r.db.WithTx(ctx, func(ctx context.Context, tx *dbx.Tx) error {
var path []byte
err = tx.Tx.QueryRowContext(ctx, r.db.Rebind(`
SELECT path, data FROM injuredsegments
WHERE attempted IS NULL
OR attempted < datetime('now','-1 hours')
ORDER BY attempted LIMIT 1`)).Scan(&path, &seg)
if err != nil {
return err
}
res, err := tx.Tx.ExecContext(ctx, r.db.Rebind(`UPDATE injuredsegments SET attempted = datetime('now') WHERE path = ?`), path)
if err != nil {
return err
}
count, err := res.RowsAffected()
if err != nil {
return err
}
if count != 1 {
return fmt.Errorf("Expected 1, got %d segments deleted", count)
}
return nil
})
if err == sql.ErrNoRows {
err = storage.ErrEmptyQueue.New("")
}
return seg, err
}
func (r *repairQueue) Select(ctx context.Context) (seg *pb.InjuredSegment, err error) {
defer mon.Task()(&ctx)(&err)
switch t := r.db.DB.Driver().(type) {
case *sqlite3.SQLiteDriver:
return r.sqliteSelect(ctx)
case *pq.Driver:
return r.postgresSelect(ctx)
default:
return seg, fmt.Errorf("Unsupported database %t", t)
}
}
func (r *repairQueue) Delete(ctx context.Context, seg *pb.InjuredSegment) (err error) {
defer mon.Task()(&ctx)(&err)
_, err = r.db.ExecContext(ctx, r.db.Rebind(`DELETE FROM injuredsegments WHERE path = ?`), seg.Path)
return Error.Wrap(err)
}
func (r *repairQueue) SelectN(ctx context.Context, limit int) (segs []pb.InjuredSegment, err error) {
defer mon.Task()(&ctx)(&err)
if limit <= 0 || limit > storage.LookupLimit {
limit = storage.LookupLimit
}
//todo: strictly enforce order-by or change tests
rows, err := r.db.QueryContext(ctx, r.db.Rebind(`SELECT data FROM injuredsegments LIMIT ?`), limit)
if err != nil {
return nil, Error.Wrap(err)
}
for rows.Next() {
var seg pb.InjuredSegment
err = rows.Scan(&seg)
if err != nil {
return segs, Error.Wrap(err)
}
segs = append(segs, seg)
}
return segs, Error.Wrap(rows.Err())
}