syncthing/cmd/stdiscosrv/clean.go

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// Copyright (C) 2014-2015 Jakob Borg and Contributors (see the CONTRIBUTORS file).
package main
import (
"database/sql"
"log"
"time"
)
type cleansrv struct {
intv time.Duration
db *sql.DB
prep map[string]*sql.Stmt
}
func (s *cleansrv) Serve() {
for {
time.Sleep(next(s.intv))
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err := s.cleanOldEntries()
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if err != nil {
log.Println("Clean:", err)
}
}
}
func (s *cleansrv) Stop() {
panic("stop unimplemented")
}
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func (s *cleansrv) cleanOldEntries() (err error) {
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var tx *sql.Tx
tx, err = s.db.Begin()
if err != nil {
return err
}
defer func() {
if err == nil {
err = tx.Commit()
} else {
tx.Rollback()
}
}()
res, err := tx.Stmt(s.prep["cleanAddress"]).Exec()
if err != nil {
return err
}
if rows, _ := res.RowsAffected(); rows > 0 {
log.Printf("Clean: %d old addresses", rows)
}
res, err = tx.Stmt(s.prep["cleanDevice"]).Exec()
if err != nil {
return err
}
if rows, _ := res.RowsAffected(); rows > 0 {
log.Printf("Clean: %d old devices", rows)
}
var devs, addrs int
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row := tx.Stmt(s.prep["countDevice"]).QueryRow()
if err = row.Scan(&devs); err != nil {
return err
}
row = tx.Stmt(s.prep["countAddress"]).QueryRow()
if err = row.Scan(&addrs); err != nil {
return err
}
log.Printf("Database: %d devices, %d addresses", devs, addrs)
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return nil
}