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database.go
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database.go
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package redlog
import (
"fmt"
)
type DB interface {
Start() error
Write(level LogType, message string)
Close() error
}
type DatabaseLog struct {
BaseLog
db DB
}
func NewDatabaseLog(db DB) (*DatabaseLog, error) {
log := DatabaseLog{
BaseLog: NewBaseLog(LEVEL_NON_DEBUG),
db: db,
}
go log.listen()
err := <-log.err
if err != nil {
return nil, fmt.Errorf("unable to start database log: %v", err)
}
return &log, nil
}
//listen will listen for log messages and write them
func (log *DatabaseLog) listen() {
err := log.db.Start()
if err != nil {
log.err <- fmt.Errorf("could start database log: %v", err)
return
}
log.err <- nil
for {
msg, ok := <-log.io
if !ok {
break
}
if (uint8(log.level) & uint8(msg.level)) > 0 {
log.db.Write(msg.level, msg.message)
}
}
err = log.db.Close()
if err != nil {
log.err <- fmt.Errorf("could not close database log: %v", err)
return
}
log.err <- nil
}
//Close closes the file
func (log *DatabaseLog) Close() error {
err := log.BaseLog.Close()
if err != nil {
return fmt.Errorf("error closing database log: %v", err)
}
return nil
}