| /** |
| * 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.security.authorize; |
| |
| import java.security.Policy; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| /** |
| * {@link PolicyProvider} provides the {@link Service} definitions to the |
| * security {@link Policy} in effect for Hadoop. |
| * |
| */ |
| @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"}) |
| @InterfaceStability.Evolving |
| public abstract class PolicyProvider { |
| |
| /** |
| * Configuration key for the {@link PolicyProvider} implementation. |
| */ |
| public static final String POLICY_PROVIDER_CONFIG = |
| "hadoop.security.authorization.policyprovider"; |
| |
| /** |
| * A default {@link PolicyProvider} without any defined services. |
| */ |
| public static final PolicyProvider DEFAULT_POLICY_PROVIDER = |
| new PolicyProvider() { |
| public Service[] getServices() { |
| return null; |
| } |
| }; |
| |
| /** |
| * Get the {@link Service} definitions from the {@link PolicyProvider}. |
| * @return the {@link Service} definitions |
| */ |
| public abstract Service[] getServices(); |
| } |