DatacenterManager datacenter = datacenters.get(hostGroupData.getId());
if (datacenter == null) {
switch (hostGroupData.getHostGroupType()) {
case HOST_GROUP_TYPE_RAW:
datacenter = new RawDatacenterManager();
break;
case HOST_GROUP_TYPE_AMAZON_EC2:
HostGroupSecretData secretData = computeSecrets.getSecretData(hostGroupData);
datacenter = new Ec2DatacenterManager(hostGroupData, secretData);
break;