cgrates/engine/storage_postgres.go

/*
Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
Copyright (C) ITsysCOM GmbH

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>
*/
package engine

import (
	"fmt"

	"github.com/cgrates/cgrates/utils"

	"github.com/jinzhu/gorm"
	_ "github.com/lib/pq"
)

func NewPostgresStorage(host, port, name, user, password string, maxConn, maxIdleConn int) (*PostgresStorage, error) {
	connectString := fmt.Sprintf("host=%s port=%s dbname=%s user=%s password=%s sslmode=disable", host, port, name, user, password)
	db, err := gorm.Open("postgres", connectString)
	if err != nil {
		return nil, err
	}
	err = db.DB().Ping()
	if err != nil {
		return nil, err
	}
	db.DB().SetMaxIdleConns(maxIdleConn)
	db.DB().SetMaxOpenConns(maxConn)
	//db.LogMode(true)

	return &PostgresStorage{&SQLStorage{Db: db.DB(), db: db}}, nil
}

type PostgresStorage struct {
	*SQLStorage
}

func (self *PostgresStorage) SetVersions(vrs Versions, overwrite bool) (err error) {
	tx := self.db.Begin()
	if overwrite {
		tx.Table(utils.TBLVersions).Delete(nil)
	}
	for key, val := range vrs {
		vrModel := &TBLVersion{Item: key, Version: val}
		if !overwrite {
			if err = tx.Model(&TBLVersion{}).Where(
				TBLVersion{Item: vrModel.Item}).Delete(TBLVersion{Version: val}).Error; err != nil {
				tx.Rollback()
				return
			}
		}
		if err = tx.Save(vrModel).Error; err != nil {
			tx.Rollback()
			return
		}
	}
	tx.Commit()
	return
}