Request mapping and static fields

Question

I am trying to set value for @RequestMapping annotation as follows: @RequestMapping(value = VALUE)

@RequestMapping(value = VALUE)
public class SomeClass {
  public final static String value = randomValue();
  public static randomValue() {
     return "some random stuff here";
  }
}

Now, I've noticed that is not legit since I got this error:

Attribute value must be constant

Can someone explain me why this is happening, please?

you can't have random value as an endpoint – Ori Marko Jan 07 '21 at 08:21 — Ori Marko, Jan 07 '21 at 08:21

score 1 · Accepted Answer · answered Jan 07 '21 at 08:25

1

Attribute value must be constant

Simply means that you can not assign a variable or some random values like VALUE for an endpoint. You should supply a constant string or multiple of it like the examples below:

@RequestMapping(value = "/value")
public class SomeClass {}

@RequestMapping("/value")
public class SomeClass {}

@RequestMapping(value = {"/value", "/"})
public class SomeClass {}

answered Jan 07 '21 at 08:25

Donato Amasa

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You can use `public final static String value = "some random value"` and works. Why doesn't it work with `public final static String value = randomValue();` ? – user1234SI. Jan 07 '21 at 09:43
you should remove the `final` keyword then it would work. when you declare a variable as final, it should have a constant value – Donato Amasa Jan 07 '21 at 09:45
1

It's not going to work by removing `final` since `@RequestMapping` requires constants. – Andriesi Claudiu Jan 07 '21 at 09:48
@DonatoAmasa, so, are you saying that `public final static String VALUE = randomValue();` isn't a constant? – Andriesi Claudiu Jan 07 '21 at 09:50
I'm referring to the variable `value` declared on the class `SomeClass` – Donato Amasa Jan 07 '21 at 09:50

Request mapping and static fields

1 Answers1