hadoop PolicyProvider 源码
haddop PolicyProvider 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/authorize/PolicyProvider.java
/**
* 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() {
@Override
public Service[] getServices() {
return null;
}
};
/**
* Get the {@link Service} definitions from the {@link PolicyProvider}.
* @return the {@link Service} definitions
*/
public abstract Service[] getServices();
}
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