| /** |
| * 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.io.OutputStream; |
| 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.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.slive.DataWriter.GenerateOutput; |
| import org.apache.hadoop.fs.slive.OperationOutput.OutputType; |
| |
| /** |
| * Operation which selects a random file and appends a random amount of bytes |
| * (selected from the configuration for append size) to that file if it exists. |
| * |
| * This operation will capture statistics on success for bytes written, time |
| * taken (milliseconds), and success count and on failure it will capture the |
| * number of failures and the time taken (milliseconds) to fail. |
| */ |
| class AppendOp extends Operation { |
| |
| private static final Log LOG = LogFactory.getLog(AppendOp.class); |
| |
| AppendOp(ConfigExtractor cfg, Random rnd) { |
| super(AppendOp.class.getSimpleName(), cfg, rnd); |
| } |
| |
| /** |
| * Gets the file to append to |
| * |
| * @return Path |
| */ |
| protected Path getAppendFile() { |
| Path fn = getFinder().getFile(); |
| return fn; |
| } |
| |
| @Override // Operation |
| List<OperationOutput> run(FileSystem fs) { |
| List<OperationOutput> out = super.run(fs); |
| OutputStream os = null; |
| try { |
| Path fn = getAppendFile(); |
| // determine file status for file length requirement |
| // to know if should fill in partial bytes |
| Range<Long> appendSizeRange = getConfig().getAppendSize(); |
| if (getConfig().shouldAppendUseBlockSize()) { |
| appendSizeRange = getConfig().getBlockSize(); |
| } |
| long appendSize = Range.betweenPositive(getRandom(), appendSizeRange); |
| long timeTaken = 0, bytesAppended = 0; |
| DataWriter writer = new DataWriter(getRandom()); |
| LOG.info("Attempting to append to file at " + fn + " of size " |
| + Helper.toByteInfo(appendSize)); |
| { |
| // open |
| long startTime = Timer.now(); |
| os = fs.append(fn); |
| timeTaken += Timer.elapsed(startTime); |
| // append given length |
| GenerateOutput stats = writer.writeSegment(appendSize, os); |
| timeTaken += stats.getTimeTaken(); |
| bytesAppended += stats.getBytesWritten(); |
| // capture close time |
| startTime = Timer.now(); |
| os.close(); |
| os = null; |
| timeTaken += Timer.elapsed(startTime); |
| } |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.BYTES_WRITTEN, bytesAppended)); |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.OK_TIME_TAKEN, timeTaken)); |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.SUCCESSES, 1L)); |
| LOG.info("Appended " + Helper.toByteInfo(bytesAppended) + " to file " |
| + fn + " in " + timeTaken + " milliseconds"); |
| } catch (FileNotFoundException e) { |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.NOT_FOUND, 1L)); |
| LOG.warn("Error with appending", e); |
| } catch (IOException e) { |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.FAILURES, 1L)); |
| LOG.warn("Error with appending", e); |
| } finally { |
| if (os != null) { |
| try { |
| os.close(); |
| } catch (IOException e) { |
| LOG.warn("Error with closing append stream", e); |
| } |
| } |
| } |
| return out; |
| } |
| } |