@Override
public Instance update(Instance existingEntity, Instance requestedEntity) {
LOG.debug(
String.format(
"update(Existing Instance - %s,Requested Instance - %s)",
existingEntity, requestedEntity));
InstanceStateTransition transition = new InstanceStateTransition();
Instance entityToReturn = null;
if (existingEntity != null) {
transition.setPreviousState(existingEntity.getState());
// we set this here in case we can't write the state want.
// this way the user doesn't get back a null. :D.
transition.setNextState(existingEntity.getState());
instanceStatusMap.put(existingEntity.getInstanceId(), transition);
if (existingEntity.getNodeId() != null
&& existingEntity.getState() != InstanceState.SHUTTING_DOWN
&& existingEntity.getState() != InstanceState.TERMINATED) {
existingEntity.setState(InstanceState.SHUTTING_DOWN);
entityToReturn = existingEntity;
} else if (existingEntity.getState() != InstanceState.TERMINATED) {
LOG.info(
String.format(
"Instance %s is provisionally being terminated before an Instance Manager has claimed it by stamping a node id onto it",
existingEntity.getInstanceId()));
existingEntity.setState(InstanceState.TERMINATED);
entityToReturn = existingEntity;
}
} else {
LOG.warn(String.format("Expected non-null instance"));
}
return entityToReturn;
}
