Grails,How to use enum

Grails,How to use enum

Example:

Groovy Code

package com.test

public enum MessageStatus 
 PENDING(0),SUCCESS(1),FALSE(2)

 private final Integer value

 MessageStatus(Integer value) 
 this.value = value
 

 Integer getId()
 value
 

Grails Domain call this groovy method

import com.test.MessageStatus

class MessageDetails 
 MessageStatus status

Grails,How to use enum