| /** |
| * 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.storm.loadgen; |
| |
| import java.io.Serializable; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import org.apache.storm.utils.ObjectReader; |
| |
| /** |
| * A repeating pattern of skewedness in processing times. This is used to simulate an executor that slows down. |
| */ |
| public class SlowExecutorPattern implements Serializable { |
| private static final Pattern PARSER = Pattern.compile("\\s*(?<slowness>[^:]+)\\s*(?::\\s*(?<count>[0-9]+))?\\s*"); |
| public final double maxSlownessMs; |
| public final int count; |
| |
| /** |
| * Parses a string (command line) representation of "<SLOWNESS>(:<COUNT>)?". |
| * @param strRepresentation the string representation to parse |
| * @return the corresponding SlowExecutorPattern. |
| */ |
| public static SlowExecutorPattern fromString(String strRepresentation) { |
| Matcher m = PARSER.matcher(strRepresentation); |
| if (!m.matches()) { |
| throw new IllegalArgumentException(strRepresentation + " is not in the form <SLOWNESS>(:<COUNT>)?"); |
| } |
| double slownessMs = Double.valueOf(m.group("slowness")); |
| String c = m.group("count"); |
| int count = c == null ? 1 : Integer.valueOf(c); |
| return new SlowExecutorPattern(slownessMs, count); |
| } |
| |
| /** |
| * Creates a SlowExecutorPattern from a Map config. |
| * @param conf the conf to parse. |
| * @return the corresponding SlowExecutorPattern. |
| */ |
| public static SlowExecutorPattern fromConf(Map<String, Object> conf) { |
| double slowness = ObjectReader.getDouble(conf.get("slownessMs"), 0.0); |
| int count = ObjectReader.getInt(conf.get("count"), 1); |
| return new SlowExecutorPattern(slowness, count); |
| } |
| |
| /** |
| * Convert this to a Config map. |
| * @return the corresponding Config map to this. |
| */ |
| public Map<String, Object> toConf() { |
| Map<String, Object> ret = new HashMap<>(); |
| ret.put("slownessMs", maxSlownessMs); |
| ret.put("count", count); |
| return ret; |
| } |
| |
| public SlowExecutorPattern(double maxSlownessMs, int count) { |
| this.count = count; |
| this.maxSlownessMs = maxSlownessMs; |
| } |
| |
| public double getExtraSlowness(int index) { |
| return (index >= count) ? 0 : maxSlownessMs; |
| } |
| |
| } |