| /** |
| * 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.hadoop.fs.slive; |
| |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Random; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.slive.OperationOutput.OutputType; |
| |
| /** |
| * Operation which selects a random directory and attempts to list that |
| * directory (if it exists) |
| * |
| * This operation will capture statistics on success the time taken to list that |
| * directory and the number of successful listings that occurred as well as the |
| * number of entries in the selected directory and on failure or error it will |
| * capture the number of failures and the amount of time taken to fail |
| */ |
| class ListOp extends Operation { |
| |
| private static final Log LOG = LogFactory.getLog(ListOp.class); |
| |
| ListOp(ConfigExtractor cfg, Random rnd) { |
| super(ListOp.class.getSimpleName(), cfg, rnd); |
| } |
| |
| /** |
| * Gets the directory to list |
| * |
| * @return Path |
| */ |
| protected Path getDirectory() { |
| Path dir = getFinder().getDirectory(); |
| return dir; |
| } |
| |
| @Override // Operation |
| List<OperationOutput> run(FileSystem fs) { |
| List<OperationOutput> out = super.run(fs); |
| try { |
| Path dir = getDirectory(); |
| long dirEntries = 0; |
| long timeTaken = 0; |
| { |
| long startTime = Timer.now(); |
| FileStatus[] files = fs.listStatus(dir); |
| timeTaken = Timer.elapsed(startTime); |
| dirEntries = files.length; |
| } |
| // log stats |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.OK_TIME_TAKEN, timeTaken)); |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.SUCCESSES, 1L)); |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.DIR_ENTRIES, dirEntries)); |
| LOG.info("Directory " + dir + " has " + dirEntries + " entries"); |
| } catch (FileNotFoundException e) { |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.NOT_FOUND, 1L)); |
| LOG.warn("Error with listing", e); |
| } catch (IOException e) { |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.FAILURES, 1L)); |
| LOG.warn("Error with listing", e); |
| } |
| return out; |
| } |
| |
| } |