protected Location getLocation(@Nullable Collection<? extends Location> locations) {
if (locations == null || locations.isEmpty()) locations = entity().getLocations();
if (locations.isEmpty()) {
MachineProvisioningLocation<?> provisioner =
entity().getAttribute(SoftwareProcess.PROVISIONING_LOCATION);
if (provisioner != null) locations = Arrays.<Location>asList(provisioner);
}
locations = Locations.getLocationsCheckingAncestors(locations, entity());
Maybe<MachineLocation> ml = Locations.findUniqueMachineLocation(locations);
if (ml.isPresent()) return ml.get();
if (locations.isEmpty())
throw new IllegalArgumentException("No locations specified when starting " + entity());
if (locations.size() != 1 || Iterables.getOnlyElement(locations) == null)
throw new IllegalArgumentException(
"Ambiguous locations detected when starting " + entity() + ": " + locations);
return Iterables.getOnlyElement(locations);
}
@Override
public void deleteLocation() {
MesosLocation location = getDynamicLocation();
if (location != null) {
location.deregister();
Locations.unmanage(location);
}
sensors().set(LocationOwner.DYNAMIC_LOCATION, null);
sensors().set(LocationOwner.LOCATION_NAME, null);
}
@Override
public Void call(ConfigBag parameters) {
Collection<? extends Location> locations = null;
Object locationsRaw = parameters.getStringKey(LOCATIONS.getName());
locations =
Locations.coerceToCollectionOfLocationsManaged(
entity().getManagementContext(), locationsRaw);
if (locations == null) {
// null/empty will mean to inherit from parent
locations = Collections.emptyList();
}
start(locations);
return null;
}