| /** |
| * 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.lens.lib.query; |
| |
| import java.io.IOException; |
| import java.security.PrivilegedExceptionAction; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.security.UserGroupInformation; |
| |
| import lombok.extern.slf4j.Slf4j; |
| |
| @Slf4j |
| public class FileSystemUtil { |
| |
| private FileSystemUtil() {} |
| |
| public static FileSystem createFileSystem(String proxyUser, Path path) { |
| try { |
| UserGroupInformation ugi = UserGroupInformation.createProxyUser(proxyUser, UserGroupInformation.getLoginUser()); |
| return ugi.doAs((PrivilegedExceptionAction<FileSystem>) () -> open(path)); |
| } catch (IOException e) { |
| log.error("error initializing filesystem, giving up leadership", e); |
| throw new RuntimeException(e); |
| } catch (InterruptedException e) { |
| log.error("interrupted while initializing filesystem, giving up leadership", e); |
| throw new RuntimeException(e); |
| } |
| } |
| |
| public static FileSystem open(Path filePath) throws IOException { |
| Configuration conf = new Configuration(); |
| conf.setBoolean("fs.automatic.close", false); |
| return filePath.getFileSystem(conf); |
| } |
| |
| } |