/
handler.go
98 lines (94 loc) · 2.03 KB
/
handler.go
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/*
* Copyright 2024 InfAI (CC SES)
*
* 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 sql_db_hdl
import (
"bufio"
"context"
"database/sql"
"io"
"os"
"strings"
"time"
)
func InitDB(ctx context.Context, db *sql.DB, schemaPath string, delay, timeout time.Duration, migrations ...Migration) error {
err := waitForDB(ctx, db, delay)
if err != nil {
return err
}
file, err := os.Open(schemaPath)
if err != nil {
return err
}
defer file.Close()
reader := bufio.NewReader(file)
var stmts []string
for {
stmt, err := reader.ReadString(';')
if err == io.EOF {
break
} else if err != nil {
return err
}
stmts = append(stmts, strings.TrimSuffix(stmt, ";"))
}
ctxWt, cf := context.WithTimeout(ctx, timeout)
defer cf()
for _, stmt := range stmts {
_, err = db.ExecContext(ctxWt, stmt)
if err != nil {
return err
}
}
for _, migration := range migrations {
ok, err := migration.Required(ctx, db, timeout)
if err != nil {
return err
}
if ok {
if err = migration.Run(ctx, db, timeout); err != nil {
return err
}
}
}
return nil
}
func waitForDB(ctx context.Context, db *sql.DB, delay time.Duration) error {
err := db.PingContext(ctx)
if err == nil {
return nil
} else {
if Logger != nil {
Logger.Error(err)
}
}
ticker := time.NewTicker(delay)
defer ticker.Stop()
for {
select {
case <-ticker.C:
err = db.PingContext(ctx)
if err == nil {
return nil
} else {
if Logger != nil {
Logger.Error(err)
}
}
case <-ctx.Done():
return ctx.Err()
}
}
}