Java tutorial
/* * Copyright (c) 2011, Cloudera, Inc. All Rights Reserved. * * Cloudera, Inc. 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 * * This software 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.cloudera.hoop.fs; import com.cloudera.lib.service.Hadoop; import org.apache.hadoop.fs.FileSystem; import org.apache.hadoop.fs.Path; import java.io.IOException; /** * Executor that performs a set-owner Hadoop files system operation. */ public class FSSetOwner implements Hadoop.FileSystemExecutor<Void> { private Path path; private String owner; private String group; /** * Creates a set-owner executor. * * @param path the path to set the owner. * @param owner owner to set. * @param group group to set. */ public FSSetOwner(String path, String owner, String group) { this.path = new Path(path); this.owner = owner; this.group = group; } /** * Executes the filesystem operation. * * @param fs filesystem instance to use. * @return void. * @throws IOException thrown if an IO error occured. */ @Override public Void execute(FileSystem fs) throws IOException { fs.setOwner(path, owner, group); return null; } }