hadoop AWSPolicyProvider 源码
haddop AWSPolicyProvider 代码
文件路径：/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/auth/delegation/AWSPolicyProvider.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.fs.s3a.auth.delegation;
import java.util.List;
import java.util.Set;
import org.apache.hadoop.fs.s3a.auth.RoleModel;
/**
* Interface for providers of AWS policy for accessing data.
* This is used when building up the role permissions for a delegation
* token.
*
* The permissions requested are from the perspective of
* S3A filesystem operations on the data, <i>not</i> the simpler
* model of "permissions on the the remote service".
* As an example, AWS-KMS encryption permissions must
* also be requested.
*/
public interface AWSPolicyProvider {
/**
* Get the AWS policy statements required for accessing this service.
*
* @param access access level desired.
* @return a possibly empty list of statements to grant access at that
* level.
*/
List<RoleModel.Statement> listAWSPolicyRules(Set<AccessLevel> access);
/**
* Access levels.
*/
enum AccessLevel {
/** Filesystem data read operations. */
READ,
/** Data write, encryption, etc. */
WRITE,
/** Administration of the data, tables, etc. */
ADMIN,
}
}
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