private <T extends SingularityMachineAbstraction<T>> CheckResult check(
T object, AbstractMachineManager<T> manager) {
Optional<T> existingObject = manager.getObject(object.getId());
if (!existingObject.isPresent()) {
manager.saveObject(object);
return CheckResult.NEW;
}
MachineState currentState = existingObject.get().getCurrentState().getState();
switch (currentState) {
case ACTIVE:
case FROZEN:
return CheckResult.ALREADY_ACTIVE;
case DEAD:
case MISSING_ON_STARTUP:
manager.changeState(object.getId(), MachineState.ACTIVE, Optional.<String>absent());
return CheckResult.NEW;
case DECOMMISSIONED:
case DECOMMISSIONING:
case STARTING_DECOMMISSION:
return CheckResult.DECOMMISSIONING;
}
throw new IllegalStateException(
String.format("Invalid state %s for %s", currentState, object.getId()));
}
private <T extends SingularityMachineAbstraction<T>> void changeState(
Map<T, MachineState> map, AbstractMachineManager<T> manager) {
for (Entry<T, MachineState> entry : map.entrySet()) {
manager.changeState(
entry.getKey().getId(), entry.getValue(), entry.getKey().getCurrentState().getUser());
}
}