| /** |
| * 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.storm.security.auth; |
| |
| import java.security.Principal; |
| import java.util.Map; |
| |
| /** |
| * Storm can be configured to launch worker processed as a given user. Some transports need to map the Principal to a local user name. |
| */ |
| public interface IPrincipalToLocal { |
| /** |
| * Invoked once immediately after construction. |
| * |
| * @param topoConf Storm configuration |
| */ |
| void prepare(Map<String, Object> topoConf); |
| |
| /** |
| * Convert a Principal to a local user name. |
| * |
| * @param principal the principal to convert |
| * @return The local user name. |
| */ |
| default String toLocal(Principal principal) { |
| return principal == null ? null : toLocal(principal.getName()); |
| } |
| |
| String toLocal(String principalName); |
| } |