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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  package org.apache.hadoop.hbase.master.procedure;
20  
21  import org.apache.commons.logging.Log;
22  import org.apache.commons.logging.LogFactory;
23  import org.apache.hadoop.hbase.classification.InterfaceAudience;
24  import org.apache.hadoop.hbase.classification.InterfaceStability;
25  import org.apache.hadoop.hbase.protobuf.generated.RPCProtos.UserInformation;
26  import org.apache.hadoop.security.UserGroupInformation;
27  
28  @InterfaceAudience.Private
29  @InterfaceStability.Evolving
30  public final class MasterProcedureUtil {
31    private static final Log LOG = LogFactory.getLog(MasterProcedureUtil.class);
32  
33    private MasterProcedureUtil() {}
34  
35    public static UserInformation toProtoUserInfo(UserGroupInformation ugi) {
36      UserInformation.Builder userInfoPB = UserInformation.newBuilder();
37      userInfoPB.setEffectiveUser(ugi.getUserName());
38      if (ugi.getRealUser() != null) {
39        userInfoPB.setRealUser(ugi.getRealUser().getUserName());
40      }
41      return userInfoPB.build();
42    }
43  
44    public static UserGroupInformation toUserInfo(UserInformation userInfoProto) {
45      if (userInfoProto.hasEffectiveUser()) {
46        String effectiveUser = userInfoProto.getEffectiveUser();
47        if (userInfoProto.hasRealUser()) {
48          String realUser = userInfoProto.getRealUser();
49          UserGroupInformation realUserUgi = UserGroupInformation.createRemoteUser(realUser);
50          return UserGroupInformation.createProxyUser(effectiveUser, realUserUgi);
51        }
52        return UserGroupInformation.createRemoteUser(effectiveUser);
53      }
54      return null;
55    }
56  }