/*
* 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.hoop.HoopServer;
import com.cloudera.lib.service.Hadoop;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import java.io.IOException;
import java.util.Map;
/**
* Executor that performs a file-status Hadoop files system operation.
*/
public class FSFileStatus implements Hadoop.FileSystemExecutor<Map> {
private Path path;
/**
* Creates a file-status executor.
*
* @param path the path to retrieve the status.
*/
public FSFileStatus(String path) {
this.path = new Path(path);
}
/**
* Executes the filesystem operation.
*
* @param fs filesystem instance to use.
* @return a Map object (JSON friendly) with the file status.
* @throws IOException thrown if an IO error occured.
*/
@Override
public Map execute(FileSystem fs) throws IOException {
FileStatus status = fs.getFileStatus(path);
return FSUtils.fileStatusToJSON(status, HoopServer.get().getBaseUrl());
}
}