Set nodes in jenkins to accept jobs

gistfile1.groovy

def requiredNodes = ['node1', 'node2', 'node3'];
def status = 0;
for (node in requiredNodes) 
{
      println "Searching for $node";
      slave = Hudson.instance.slaves.find({it.name == node});
      if (slave != null)
       {
        computer = slave.getComputer();
        if (computer.isOffline())
         {
           println "Error! $node is offline.";
           status = 1;
         }
         else 
         {
           println "OK: $node is online";
           if(!computer.isAcceptingTasks())
           {
              computer.setAcceptingTasks(true);
           }
         }
       }
       else 
       {
         println "Slave $node not found!";
         status = 1;
       }
}
status;