cc-backend/internal/repository/transaction.go

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2023-06-06 10:27:55 +02:00
// Copyright (C) 2022 NHR@FAU, University Erlangen-Nuremberg.
// All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package repository
import (
"github.com/ClusterCockpit/cc-backend/pkg/log"
"github.com/ClusterCockpit/cc-backend/pkg/schema"
"github.com/jmoiron/sqlx"
)
type Transaction struct {
tx *sqlx.Tx
stmt *sqlx.NamedStmt
}
func (r *JobRepository) TransactionInit() (*Transaction, error) {
var err error
t := new(Transaction)
// Inserts are bundled into transactions because in sqlite,
// that speeds up inserts A LOT.
t.tx, err = r.DB.Beginx()
if err != nil {
log.Warn("Error while bundling transactions")
return nil, err
}
t.stmt, err = t.tx.PrepareNamed(NamedJobInsert)
if err != nil {
log.Warn("Error while preparing namedJobInsert")
return nil, err
}
return t, nil
}
func (r *JobRepository) TransactionCommit(t *Transaction) error {
var err error
if t.tx != nil {
if err = t.tx.Commit(); err != nil {
log.Warn("Error while committing transactions")
return err
}
}
t.tx, err = r.DB.Beginx()
if err != nil {
log.Warn("Error while bundling transactions")
return err
}
t.stmt = t.tx.NamedStmt(t.stmt)
return nil
}
func (r *JobRepository) TransactionEnd(t *Transaction) error {
if err := t.tx.Commit(); err != nil {
log.Warn("Error while committing SQL transactions")
return err
}
return nil
}
func (r *JobRepository) TransactionAdd(t *Transaction, job schema.Job) (int64, error) {
res, err := t.stmt.Exec(job)
if err != nil {
log.Errorf("repository initDB(): %v", err)
return 0, err
}
id, err := res.LastInsertId()
if err != nil {
log.Errorf("repository initDB(): %v", err)
return 0, err
}
return id, nil
}
func (r *JobRepository) TransactionAddTag(t *Transaction, tag *schema.Tag) (int64, error) {
res, err := t.tx.Exec(`INSERT INTO tag (tag_name, tag_type) VALUES (?, ?)`, tag.Name, tag.Type)
if err != nil {
log.Errorf("Error while inserting tag into tag table: %v (Type %v)", tag.Name, tag.Type)
return 0, err
}
tagId, err := res.LastInsertId()
if err != nil {
log.Warn("Error while getting last insert ID")
return 0, err
}
return tagId, nil
}
func (r *JobRepository) TransactionSetTag(t *Transaction, jobId int64, tagId int64) error {
if _, err := t.tx.Exec(`INSERT INTO jobtag (job_id, tag_id) VALUES (?, ?)`, jobId, tagId); err != nil {
log.Errorf("Error while inserting jobtag into jobtag table: %v (TagID %v)", jobId, tagId)
return err
}
return nil
}