Could not serialize flow execution
-
17-04-2021 - |
Pregunta
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
Problem:
i got this error with in my grails project
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
Note:
i try to serialize domain class, controller, service, & command object class,
but i couldn't solve this issue.
any help, thanks
Edit:
Validation Service
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;
})
}
}
Payment Controller
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')
}
....
}
}
The Error happens here:
if (!flow.step1Bean.validate()){
error()
}
Solución
you have a (src/groovy)
directory in your grails project
. put your validation Service class
under this directory, and your makepaymentStepCommand
will be as:
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.
Otros consejos
Loking at the exception message, it seems like ValidationService
is not serializable (though you haven't shown any code, so it's very difficult to guess what might be happening).
At a guess, I'd say this object is dependency-injected into each Payment
, and you're trying to store a Payment
in flow scope, which therefore causes an attempt to also store a PaymentService
.