I wondering what is the best way to handle error form multiple level abstraction in go. Every time if I must add a new level abstraction to program, I am forced to transfer error code from level less to level high. Thereby is duplicate communitaces in log file or I must remmember to delete communicate form level low and transfer him to level higher. Below simply example. I skipped creating each object to more shortly and celar code, but I think You understand my problem
type ObjectOne struct{
someValue int
}
func (o* ObjectOne)CheckValue()error{
if o.someValue == 0 {
SomeLogger.Printf("Value is 0 error program") // communicate form first level abstraction to logger
return errors.New("Internal value in object is 0")
}
return nil
}
type ObjectTwoHigherLevel struct{
objectOne ObjectOne
}
func (oT* ObjectTwoHigherLevel)CheckObjectOneIsReady() error{
if err := oT.objectOne.CheckValue() ; err != nil{
SomeLogger.Printf("Value in objectOne is not correct for objectTwo %s" , err) // second communicate
return err
}
return nil
}
type ObjectThreeHiggerLevel struct{
oT ObjectTwoHigherLevel
}
func (oTh* ObjectThreeHiggerLevel)CheckObjectTwoIsReady()error{
if err := oTh.oT.CheckObjectOneIsReady() ; err != nil{
SomeLogger.Printf("Value in objectTwo is not correct for objectThree %s" , err)
return err
}
return nil
}
In result in log file I get duplicate posts
Value is 0 error program
Value in objectOne is not correct for objectTwo Internal value in object is 0
Value in objectTwo is not correct for objectThree Internal value in object is 0
In turn if I only transfer some err
to higher level without additional log I lost information what happend in each level.
How this solve ? How privent duplicate communicates ? Or My way is the good and the only ?
Problem is more frustrating if I create a few object which search something in database on a few abstraction level then I get also few lines form this same task in logFile.
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