Impossible de sérialiser l'exécution du flux

Question

Exception:

Error 500: Could not serialize flow execution; make sure all objects stored in 
           flow or flash scope are serializable
Servlet: grails
URI: /payment.com/grails/payment/makePayment.dispatch
Exception Message: payment.com.ValidationService$$EnhancerByCGLIB$$d0f2434f 
Caused by: Could not serialize flow execution; make sure all objects stored in 
           flow or flash scope are serializable 
Class: Unknown 
At Line: [-1] 
Code Snippet:

Discussion:

payment.com: project name         
payment: is the name of (domain, view, controller)
makePayment: is a webflow to make payment
ValidationService: is a service to test if credit card is valid or not

Problème:
J'ai eu cette erreur dans mon projet Graals

i have a grails webflow that makes a payment, in this webflow i use grails 
command object to validate input values.
when i call the method isValid from Validation service i got this error

Noter:

i try to serialize domain class, controller, service, & command object class, 
but i couldn't solve this issue.

Toute aide, merci

Éditer:

Service de validation

 package payment.com

 import java.io.Serializable;

 class ValidationService implements Serializable{

// Filter out non-digit characters
def getDigitsOnly (String s) {
  StringBuffer digitsOnly = new StringBuffer ();
  char c;
  for (int i = 0; i < s.length (); i++) {
    c = s.charAt (i);
    if (Character.isDigit (c)) digitsOnly.append (c);
  }
  return digitsOnly.toString ();
}

// Perform Luhn check
def isValid (String cardNumber) {
  String digitsOnly = getDigitsOnly (cardNumber);
  int sum = 0;
  int digit = 0;
  int addend = 0;
  boolean timesTwo = false;

  for (int i = digitsOnly.length () - 1; i >= 0; i--) {
    digit = Integer.parseInt (digitsOnly.substring (i, i + 1));
    if (timesTwo){
      addend = digit * 2;
      if (addend > 9) addend -= 9;
    }else{
      addend = digit;
    }
    sum += addend;
    timesTwo = !timesTwo;
  }
  int modulus = sum % 10;

  if (modulus == 0){
      return true
  }else{
    return false
  }
}
}

MakePaymentStep1Command

package payment.com

import org.codehaus.groovy.grails.validation.Validateable;
import java.io.Serializable;
import payment.com.ValidationService;

@Validateable
class MakePaymentStep1Command implements Serializable{
ValidationService ValidationService
String cardNumber

static constraints ={
    cardNumber(blank:false, size:11..16, validator:{ val, obj->
        if (!obj.ValidationService.isValid(val)){
            return ['payment.cardNumber.invalid']
        }
        return true;
    })
}
 }

Contrôleur de paiement

class PaymentController{
....
....
def MakePaymentFlow = {
....
    Step1{
        on('submit').to('Step1Submit')
    }
    Step1Submit{
        action {MakePaymentStep1Command cmd ->
            flow.step1Bean = cmd
            if (!flow.step1Bean.validate()){
                error()
            }
        }
        on('error').to('Step1')
        on('success'){
            flow.message = null
        }.to('Step2')
    }


....
}


}

L'erreur se produit ici:

 if (!flow.step1Bean.validate()){
     error()
 }

Answer 1

tu as un (src/groovy) Répertoire dans votre grails project. mettre votre validation Service class sous ce répertoire, et votre makepaymentStepCommand sera comme:

MakePaymentStep1Command

package payment.com

import java.io.Serializable;
import payment.com.Validation;

class MakePaymentStep1Command implements Serializable{
Validation validation
String cardNumber

static constraints ={
    cardNumber(blank:false, size:11..16, validator:{ val, obj->
         if (!obj.validation.isValid(val)){
            return ['payment.cardNumber.invalid']
         }
         return true;
    })
}
}

I am not sure if this works, but try it.

Answer 2

Loking au message d'exception, il semble que ValidationService n'est pas sérialisable (bien que vous n'ayez montré aucun code, il est donc très difficile de deviner ce qui pourrait se passer).

À une supposition, je dirais que cet objet est injecté de dépendance dans chacun Payment, et vous essayez de stocker un Payment dans la portée du flux, qui provoque donc une tentative de stocker également un PaymentService.