| /** |
| * 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.metron.rest.generator; |
| |
| 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.PosixParser; |
| import org.apache.commons.io.FileUtils; |
| import org.apache.kafka.clients.producer.KafkaProducer; |
| import org.apache.kafka.clients.producer.ProducerRecord; |
| import org.json.simple.parser.ParseException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| public class SampleDataGenerator { |
| |
| private Logger LOG = LoggerFactory.getLogger(SampleDataGenerator.class); |
| |
| private Map<String, List<String>> sampleData = new HashMap<>(); |
| private Map<String, Integer> indexes = new HashMap<>(); |
| private KafkaProducer kafkaProducer; |
| private String brokerUrl; |
| private Integer num = -1; |
| private String selectedSensorType = null; |
| private Integer delay = 1000; |
| |
| public void setBrokerUrl(String brokerUrl) { |
| this.brokerUrl = brokerUrl; |
| } |
| |
| public void setNum(Integer num) { |
| this.num = num; |
| } |
| |
| public void setSelectedSensorType(String selectedSensorType) { |
| this.selectedSensorType = selectedSensorType; |
| } |
| |
| public void setDelay(Integer delay) { |
| this.delay = delay; |
| } |
| |
| public static void main(String[] args) throws org.apache.commons.cli.ParseException, IOException, ParseException { |
| CommandLineParser parser = new PosixParser(); |
| CommandLine cli = parser.parse(getOptions(), args); |
| Integer num = Integer.parseInt(cli.getOptionValue("n", "-1")); |
| String selectedSensorType = cli.getOptionValue("s"); |
| Integer delay = Integer.parseInt(cli.getOptionValue("d", "1000")); |
| String path = cli.getOptionValue("p"); |
| if (selectedSensorType == null || path == null) { |
| HelpFormatter formatter = new HelpFormatter(); |
| formatter.printHelp( "sample_data_generator", getOptions()); |
| } else { |
| SampleDataGenerator sampleDataGenerator = new SampleDataGenerator(); |
| sampleDataGenerator.setNum(num); |
| sampleDataGenerator.setSelectedSensorType(selectedSensorType); |
| sampleDataGenerator.setDelay(delay); |
| sampleDataGenerator.generateSampleData(path); |
| } |
| |
| } |
| |
| private static Options getOptions() { |
| Options options = new Options(); |
| options.addOption("b", "brokerUrl", true, "Kafka Broker Url"); |
| options.addOption("n", "num", false, "Number of messages to emit"); |
| options.addOption("s", "sensorType", true, "Emit messages to this topic"); |
| options.addOption("d", "delay", false, "Number of milliseconds to wait between each message. Defaults to 1 second"); |
| options.addOption("p", "path", true, "Local path to data file"); |
| return options; |
| } |
| |
| public void generateSampleData(String path) throws IOException, ParseException { |
| loadData(path); |
| startClients(); |
| try { |
| emitData(num, selectedSensorType, delay); |
| } finally { |
| stopClients(); |
| } |
| } |
| |
| private void loadData(String sampleDataPath) throws IOException, ParseException { |
| sampleData.put(selectedSensorType, FileUtils.readLines(new File(sampleDataPath))); |
| indexes.put(selectedSensorType, 0); |
| } |
| |
| private void emitData(int num, String selectedSensorType, int delay) { |
| int count = 0; |
| boolean continueEmitting = false; |
| do { |
| for (String sensorType : sampleData.keySet()) { |
| if (selectedSensorType == null || selectedSensorType.equals(sensorType)) { |
| List<String> sensorData = sampleData.get(sensorType); |
| int index = indexes.get(sensorType); |
| String message = sensorData.get(index++); |
| emitSensorData(sensorType, message, delay); |
| if (num != -1 && ++count >= num) { |
| continueEmitting = false; |
| break; |
| } |
| continueEmitting = true; |
| if (index == sensorData.size()) { |
| index = 0; |
| } |
| indexes.put(sensorType, index); |
| } |
| } |
| } while (continueEmitting); |
| } |
| |
| private void emitSensorData(String sensorType, String message, int delay) { |
| try { |
| Thread.sleep(delay); |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| LOG.info("Emitting {} message {}", sensorType, message); |
| emitToKafka(sensorType, message); |
| } |
| |
| private void startClients() { |
| startKafka(); |
| } |
| |
| private void startKafka() { |
| Map<String, Object> producerConfig = new HashMap<>(); |
| producerConfig.put("bootstrap.servers", brokerUrl); |
| producerConfig.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer"); |
| producerConfig.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer"); |
| kafkaProducer = new KafkaProducer<>(producerConfig); |
| } |
| |
| private void stopClients() { |
| stopKafka(); |
| } |
| |
| private void stopKafka() { |
| LOG.info("Stopping Kafka producer"); |
| kafkaProducer.close(); |
| } |
| |
| private void emitToKafka(String topic, String message) { |
| kafkaProducer.send(new ProducerRecord<String, String>(topic, message)); |
| } |
| |
| } |