Java tutorial
/* * 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.samza.tools.benchmark; import java.io.FileInputStream; import java.io.IOException; import java.util.Map; import java.util.Properties; import java.util.function.Function; import java.util.stream.Collectors; import org.apache.commons.cli.BasicParser; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.CommandLineParser; import org.apache.commons.cli.HelpFormatter; import org.apache.commons.cli.Options; import org.apache.commons.cli.ParseException; import org.apache.samza.config.Config; import org.apache.samza.config.MapConfig; import org.apache.samza.sql.util.ReflectionUtils; import org.apache.samza.system.SystemFactory; import org.apache.samza.tools.CommandLineHelper; /** * Base class for the samza benchmark tests */ public abstract class AbstractSamzaBench { protected static final String OPT_SHORT_PROPERTIES_FILE = "p"; protected static final String OPT_LONG_PROPERTIES_FILE = "props"; protected static final String OPT_ARG_PROPERTIES_FILE = "PROPERTIES_FILE"; protected static final String OPT_DESC_PROPERTIES_FILE = "Path to the properties file."; protected static final String OPT_SHORT_NUM_EVENTS = "n"; protected static final String OPT_LONG_NUM_EVENTS = "numEvents"; protected static final String OPT_ARG_NUM_EVENTS = "NUMBER_EVENTS"; protected static final String OPT_DESC_NUM_EVENTS = "Total number of events to consume."; protected static final String OPT_SHORT_START_PARTITION = "sp"; protected static final String OPT_LONG_START_PARTITION = "startPartition"; protected static final String OPT_ARG_START_PARTITION = "START_PARTITION"; protected static final String OPT_DESC_START_PARTITION = "Start partition."; protected static final String OPT_SHORT_END_PARTITION = "ep"; protected static final String OPT_LONG_END_PARTITION = "endPartition"; protected static final String OPT_ARG_END_PARTITION = "END_PARTITION"; protected static final String OPT_DESC_END_PARTITION = "End partition."; protected static final String OPT_SHORT_STREAM = "s"; protected static final String OPT_LONG_STREAM = "streamId"; protected static final String OPT_ARG_STREAM = "STREAM_ID"; protected static final String OPT_DESC_STREAM = "STREAM ID."; protected static final String CFG_STREAM_SYSTEM_NAME = "streams.%s.samza.system"; protected static final String CFG_SYSTEM_FACTORY = "systems.%s.samza.factory"; protected static final String CFG_PHYSICAL_STREAM_NAME = "streams.%s.samza.physical.name"; protected final Options options; protected final CommandLine cmd; protected SystemFactory factory; protected Config config; protected String systemName; protected String physicalStreamName; protected int startPartition; protected int endPartition; protected int totalEvents; protected String streamId; public AbstractSamzaBench(String scriptName, String args[]) throws ParseException { options = new Options(); options.addOption(CommandLineHelper.createOption(OPT_SHORT_PROPERTIES_FILE, OPT_LONG_PROPERTIES_FILE, OPT_ARG_PROPERTIES_FILE, true, OPT_DESC_PROPERTIES_FILE)); options.addOption(CommandLineHelper.createOption(OPT_SHORT_NUM_EVENTS, OPT_LONG_NUM_EVENTS, OPT_ARG_NUM_EVENTS, true, OPT_DESC_NUM_EVENTS)); options.addOption(CommandLineHelper.createOption(OPT_SHORT_START_PARTITION, OPT_LONG_START_PARTITION, OPT_ARG_START_PARTITION, true, OPT_DESC_START_PARTITION)); options.addOption(CommandLineHelper.createOption(OPT_SHORT_END_PARTITION, OPT_LONG_END_PARTITION, OPT_ARG_END_PARTITION, true, OPT_DESC_END_PARTITION)); options.addOption(CommandLineHelper.createOption(OPT_SHORT_STREAM, OPT_LONG_STREAM, OPT_ARG_STREAM, true, OPT_DESC_STREAM)); addOptions(options); CommandLineParser parser = new BasicParser(); try { cmd = parser.parse(options, args); } catch (Exception e) { HelpFormatter formatter = new HelpFormatter(); formatter.printHelp(String.format("Error: %s.sh", scriptName), options); throw e; } } public void start() throws IOException, InterruptedException { startPartition = Integer.parseInt(cmd.getOptionValue(OPT_SHORT_START_PARTITION)); endPartition = Integer.parseInt(cmd.getOptionValue(OPT_SHORT_END_PARTITION)); totalEvents = Integer.parseInt(cmd.getOptionValue(OPT_SHORT_NUM_EVENTS)); String propsFile = cmd.getOptionValue(OPT_SHORT_PROPERTIES_FILE); streamId = cmd.getOptionValue(OPT_SHORT_STREAM); Properties props = new Properties(); props.load(new FileInputStream(propsFile)); addMoreSystemConfigs(props); config = convertToSamzaConfig(props); systemName = config.get(String.format(CFG_STREAM_SYSTEM_NAME, streamId)); String systemFactory = config.get(String.format(CFG_SYSTEM_FACTORY, systemName)); physicalStreamName = config.get(String.format(CFG_PHYSICAL_STREAM_NAME, streamId)); factory = ReflectionUtils.createInstance(systemFactory); if (factory == null) { throw new RuntimeException("Cannot instantiate systemfactory " + systemFactory); } } /** * Derived classes can override this method to add any additional properties needed to create the System * @param props Properties to which system configs can be added. */ protected void addMoreSystemConfigs(Properties props) { } /** * Derived classes can override this method to add any additional options that benchmark test may need. * @param options Options to which additional command line options can be added. */ protected void addOptions(Options options) { } Config convertToSamzaConfig(Properties props) { Map<String, String> propsValue = props.stringPropertyNames().stream() .collect(Collectors.toMap(Function.identity(), props::getProperty)); return new MapConfig(propsValue); } }