| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with this |
| * work for additional information regarding copyright ownership. The ASF |
| * licenses this file to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package org.apache.hadoop.ozone.om; |
| |
| import edu.umd.cs.findbugs.annotations.SuppressFBWarnings; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceAudience.Private; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.classification.InterfaceStability.Unstable; |
| import org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol; |
| import org.apache.hadoop.security.authorize.PolicyProvider; |
| import org.apache.hadoop.security.authorize.Service; |
| |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import static org.apache.hadoop.ozone.om.OMConfigKeys |
| .OZONE_OM_SECURITY_CLIENT_PROTOCOL_ACL; |
| |
| /** |
| * {@link PolicyProvider} for OM protocols. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Unstable |
| public final class OMPolicyProvider extends PolicyProvider { |
| |
| private static AtomicReference<OMPolicyProvider> atomicReference = |
| new AtomicReference<>(); |
| |
| private OMPolicyProvider() { |
| } |
| |
| @Private |
| @Unstable |
| public static OMPolicyProvider getInstance() { |
| if (atomicReference.get() == null) { |
| atomicReference.compareAndSet(null, new OMPolicyProvider()); |
| } |
| return atomicReference.get(); |
| } |
| |
| private static final Service[] OM_SERVICES = |
| new Service[]{ |
| new Service(OZONE_OM_SECURITY_CLIENT_PROTOCOL_ACL, |
| OzoneManagerProtocol.class), |
| }; |
| |
| @SuppressFBWarnings("EI_EXPOSE_REP") |
| @Override |
| public Service[] getServices() { |
| return OM_SERVICES; |
| } |
| |
| } |