private static class UpdatedNodesTransition implements
SingleArcTransition<JobImpl, JobEvent> {
@Override
public void transition(JobImpl job, JobEvent event) {
JobUpdatedNodesEvent updateEvent = (JobUpdatedNodesEvent) event;
for(NodeReport nr: updateEvent.getUpdatedNodes()) {
NodeState nodeState = nr.getNodeState();
if(nodeState.isUnusable()) {
// act on the updates
job.actOnUnusableNode(nr.getNodeId(), nodeState);
}