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conn.go
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conn.go
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/*
Copyright (C) 2022-2023 ApeCloud Co., Ltd
This file is part of KubeBlocks project
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package mysql
import (
"database/sql"
"github.com/apecloud/kubeblocks/pkg/lorry/dcs"
)
var connectionPoolCache = make(map[string]*sql.DB)
// GetDBConnection returns a DB Connection based on dsn.
func GetDBConnection(dsn string) (*sql.DB, error) {
if db, ok := connectionPoolCache[dsn]; ok {
return db, nil
}
db, err := sql.Open(adminDatabase, dsn)
if err != nil {
return nil, err
}
connectionPoolCache[dsn] = db
return db, nil
}
func (mgr *Manager) GetMemberConnection(cluster *dcs.Cluster, member *dcs.Member) (db *sql.DB, err error) {
if member != nil && member.Name != mgr.CurrentMemberName {
addr := cluster.GetMemberAddrWithPort(*member)
db, err = config.GetDBConnWithAddr(addr)
if err != nil {
return nil, err
}
} else {
db = mgr.DB
}
return db, nil
}