/
db.go
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/
db.go
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/**
* Copyright (c) 2024 Yunshan Networks
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package mysql
import (
"fmt"
"sync"
"gorm.io/gorm"
"github.com/deepflowio/deepflow/server/controller/db/mysql/common"
"github.com/deepflowio/deepflow/server/controller/db/mysql/config"
"github.com/deepflowio/deepflow/server/controller/db/mysql/migration"
)
var (
DefaultDB *DB
dbsOnce sync.Once
dbs *DBs
)
func GetDB(orgID int) (*DB, error) {
return GetDBs().NewDBIfNotExists(orgID)
}
func GetConfig() config.MySqlConfig {
return GetDBs().GetConfig()
}
func InitDefaultDB(cfg config.MySqlConfig) error {
var err error
DefaultDB, err = NewDB(cfg, common.DEFAULT_ORG_ID)
if err != nil {
return err
}
return nil
}
type DB struct {
*gorm.DB
ORGID int
Name string
}
func NewDB(cfg config.MySqlConfig, orgID int) (*DB, error) {
var db *gorm.DB
var err error
copiedCfg := cfg
if orgID == common.DEFAULT_ORG_ID {
db, err = common.GetSession(copiedCfg)
} else {
copiedCfg = common.ReplaceConfigDatabaseName(cfg, orgID)
db, err = common.GetSession(copiedCfg)
}
if err != nil {
log.Errorf("failed to create db session: %s, config: %v", err.Error(), copiedCfg)
return nil, err
}
return &DB{db, orgID, copiedCfg.Database}, nil
}
func (d *DB) PreORGID(format string, a ...any) string { // TODO optimize
return fmt.Sprintf("[OID-%d] %s", d.ORGID, fmt.Sprintf(format, a...))
}
type DBs struct {
cfg config.MySqlConfig
mux sync.Mutex
orgIDToDB map[int]*DB
}
func GetDBs() *DBs {
dbsOnce.Do(func() {
dbs = &DBs{
orgIDToDB: make(map[int]*DB),
}
})
return dbs
}
func (c *DBs) Init(cfg config.MySqlConfig) error {
var err error
c.cfg = cfg
DefaultDB, err = c.NewDBIfNotExists(common.DEFAULT_ORG_ID)
if err != nil {
return err
}
orgIDs, err := GetORGIDs()
if err != nil {
return err
}
for _, id := range orgIDs {
if _, err := c.NewDBIfNotExists(id); err != nil {
return err
}
}
return err
}
func (c *DBs) GetConfig() config.MySqlConfig {
return c.cfg
}
func (c *DBs) NewDBIfNotExists(orgID int) (*DB, error) {
if db, ok := c.get(orgID); ok {
return db, nil
}
db, err := NewDB(c.cfg, orgID)
if err != nil {
return nil, err
}
if err := c.check(db); err != nil {
return nil, err
}
c.set(orgID, db)
return db, nil
}
func (c *DBs) All() []*DB {
c.mux.Lock()
defer c.mux.Unlock()
var dbs []*DB
for _, db := range c.orgIDToDB {
dbs = append(dbs, db)
}
return dbs
}
func (c *DBs) Delete(orgID int) {
c.mux.Lock()
defer c.mux.Unlock()
delete(c.orgIDToDB, orgID)
}
func (c *DBs) Create(orgID int) {
c.NewDBIfNotExists(orgID)
}
func (c *DBs) get(orgID int) (*DB, bool) {
c.mux.Lock()
defer c.mux.Unlock()
db, ok := c.orgIDToDB[orgID]
return db, ok
}
func (c *DBs) set(orgID int, db *DB) {
c.mux.Lock()
defer c.mux.Unlock()
c.orgIDToDB[orgID] = db
}
func (c *DBs) check(db *DB) error {
if db.ORGID != common.DEFAULT_ORG_ID {
return nil
}
var version string
err := db.Raw(fmt.Sprintf("SELECT version FROM db_version")).Scan(&version).Error
if err != nil {
log.Errorf("db: %s, failed to check db version: %s", db.Name, err.Error())
return err
}
if version != migration.DB_VERSION_EXPECTED {
log.Errorf("db: %s, current db version: %s != expected db version: %s", db.Name, version, migration.DB_VERSION_EXPECTED)
return err
}
return nil
}
func (c *DBs) DoOnAllDBs(execFunc func(db *DB) error) error {
for _, db := range dbs.orgIDToDB {
if err := execFunc(db); err != nil {
return fmt.Errorf("org(id:%d, name:%s) %s", db.ORGID, db.Name, err.Error())
}
}
return nil
}