Reading timeout property from database for a grail job

Hi

can i read timeout property from database for a grail job. Which cause it to start after that time. Here i am able to get value from database but its not running. But if i gave def timeout = 1000 , its working fine
i.e.

class GrailJob{

def timeout = 'value that i got from database in milliseconds'

def execute(){
println "YES its working

"
}

}