| /** |
| * 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 com.datatorrent.stram.util; |
| |
| import java.io.IOException; |
| import java.security.PrivilegedAction; |
| |
| import org.apache.hadoop.security.UserGroupInformation; |
| |
| /** |
| * Need to tie this in with some type of annotation for processing a secure workload |
| * |
| * @since 0.3.2 |
| */ |
| public class SecureExecutor |
| { |
| public static <T> T execute(final SecureExecutor.WorkLoad<T> workLoad) throws IOException |
| { |
| if (UserGroupInformation.isSecurityEnabled()) { |
| UserGroupInformation loginUser = UserGroupInformation.getLoginUser(); |
| return loginUser.doAs(new PrivilegedAction<T>() |
| { |
| @Override |
| public T run() |
| { |
| return workLoad.run(); |
| } |
| }); |
| } else { |
| return workLoad.run(); |
| } |
| } |
| |
| public interface WorkLoad<T> |
| { |
| T run(); |
| } |
| |
| } |