paul8263 commented on code in PR #5046:
URL: https://github.com/apache/zeppelin/pull/5046#discussion_r2302706250


##########
zeppelin-server/src/main/java/org/apache/zeppelin/realm/RoleMappingLdapRealm.java:
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@@ -0,0 +1,86 @@
+/*
+ *  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.zeppelin.realm;
+
+import org.apache.shiro.authz.AuthorizationInfo;
+import org.apache.shiro.authz.SimpleAuthorizationInfo;
+import org.apache.shiro.realm.ldap.DefaultLdapRealm;
+import org.apache.shiro.realm.ldap.LdapContextFactory;
+import org.apache.shiro.subject.PrincipalCollection;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.naming.NamingException;
+import javax.naming.ldap.LdapContext;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * RoleMappingLdapRealm is a simple LDAP realm that returns configured role 
for specific users.
+ * Example configurations:
+ * ldapRealm = org.apache.zeppelin.realm.RoleMappingLdapRealm
+ * ldapRealm.rolesByUsername = user1:admin,user2:user,user3:user,user4:user
+ * ldapRealm.defaultRole = user
+ */
+public class RoleMappingLdapRealm extends DefaultLdapRealm {
+
+  private static final Logger LOGGER = 
LoggerFactory.getLogger(RoleMappingLdapRealm.class);
+
+  private String defaultRole = "admin";

Review Comment:
   Hi @hyunw9 ,
   Thanks for the review. I will change the default role to role1, keeping it 
consistent with the example in shiro.ini.template.
   The examples in the doc are correct but I forgot to change the default value 
for "defaultRole". Sorry for that.



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