hadoop IdMappingServiceProvider 源码
haddop IdMappingServiceProvider 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/IdMappingServiceProvider.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;
import java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* An interface for the implementation of {@literal <}userId,
* userName{@literal >} mapping and {@literal <}groupId, groupName{@literal >}
* mapping.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public interface IdMappingServiceProvider {
// Return uid for given user name
public int getUid(String user) throws IOException;
// Return gid for given group name
public int getGid(String group) throws IOException;
// Return user name for given user id uid, if not found, return
// <unknown> passed to this method
public String getUserName(int uid, String unknown);
// Return group name for given groupd id gid, if not found, return
// <unknown> passed to this method
public String getGroupName(int gid, String unknown);
// Return uid for given user name.
// When can't map user, return user name's string hashcode
public int getUidAllowingUnknown(String user);
// Return gid for given group name.
// When can't map group, return group name's string hashcode
public int getGidAllowingUnknown(String group);
}
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