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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* ================================================================================
* Licensed 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.apps.uservice.test.adapt.kafka;
import java.util.Properties;
import java.util.concurrent.TimeUnit;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.onap.policy.apex.apps.uservice.test.adapt.events.EventGenerator;
import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities;
/**
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public class KafkaEventProducer implements Runnable {
private final String topic;
private final String kafkaServerAddress;
private final int eventCount;
private final boolean xmlEvents;
private final long eventInterval;
private long eventsSentCount = 0;
private Producer<String, String> producer;
private final Thread producerThread;
private boolean sendEventsFlag = false;
private boolean stopFlag = false;
public KafkaEventProducer(final String topic, final String kafkaServerAddress, final int eventCount,
final boolean xmlEvents, final long eventInterval) {
this.topic = topic;
this.kafkaServerAddress = kafkaServerAddress;
this.eventCount = eventCount;
this.xmlEvents = xmlEvents;
this.eventInterval = eventInterval;
producerThread = new Thread(this);
producerThread.start();
}
@Override
public void run() {
final Properties kafkaProducerProperties = new Properties();
kafkaProducerProperties.put("bootstrap.servers", kafkaServerAddress);
kafkaProducerProperties.put("acks", "all");
kafkaProducerProperties.put("retries", 0);
kafkaProducerProperties.put("batch.size", 16384);
kafkaProducerProperties.put("linger.ms", 1);
kafkaProducerProperties.put("buffer.memory", 33554432);
kafkaProducerProperties.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
kafkaProducerProperties.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
producer = new KafkaProducer<String, String>(kafkaProducerProperties);
while (producerThread.isAlive() && !stopFlag) {
ThreadUtilities.sleep(50);
if (sendEventsFlag) {
sendEventsToTopic();
sendEventsFlag = false;
}
}
producer.close(1000, TimeUnit.MILLISECONDS);
}
public void sendEvents() {
sendEventsFlag = true;
}
private void sendEventsToTopic() {
System.out.println(KafkaEventProducer.class.getCanonicalName() + ": sending events to Kafka server at "
+ kafkaServerAddress + ", event count " + eventCount + ", xmlEvents " + xmlEvents);
for (int i = 0; i < eventCount; i++) {
System.out.println(KafkaEventProducer.class.getCanonicalName() + ": waiting " + eventInterval
+ " milliseconds before sending next event");
ThreadUtilities.sleep(eventInterval);
String eventString = null;
if (xmlEvents) {
eventString = EventGenerator.xmlEvent();
} else {
eventString = EventGenerator.jsonEvent();
}
producer.send(new ProducerRecord<String, String>(topic, "Event" + i + "Of" + eventCount, eventString));
producer.flush();
eventsSentCount++;
System.out.println(KafkaEventProducer.class.getCanonicalName() + ": sent event " + eventString);
}
System.out.println(KafkaEventProducer.class.getCanonicalName() + ": completed");
}
public long getEventsSentCount() {
return eventsSentCount;
}
public void shutdown() {
System.out.println(KafkaEventProducer.class.getCanonicalName() + ": stopping");
stopFlag = true;
while (producerThread.isAlive()) {
ThreadUtilities.sleep(10);
}
System.out.println(KafkaEventProducer.class.getCanonicalName() + ": stopped");
}
public static void main(final String[] args) {
if (args.length != 5) {
System.err.println("usage KafkaEventProducer topic kafkaServerAddress #events XML|JSON eventInterval");
return;
}
int eventCount = 0;
try {
eventCount = Integer.parseInt(args[2]);
} catch (final Exception e) {
System.err.println("usage KafkaEventProducer topic kafkaServerAddress #events XML|JSON eventInterval");
e.printStackTrace();
return;
}
long eventInterval = 0;
try {
eventInterval = Long.parseLong(args[4]);
} catch (final Exception e) {
System.err.println("usage KafkaEventProducer topic kafkaServerAddress #events XML|JSON eventInterval");
e.printStackTrace();
return;
}
boolean xmlEvents = false;
if (args[3].equalsIgnoreCase("XML")) {
xmlEvents = true;
} else if (!args[3].equalsIgnoreCase("JSON")) {
System.err.println("usage KafkaEventProducer topic kafkaServerAddress #events XML|JSON eventInterval");
return;
}
final KafkaEventProducer producer =
new KafkaEventProducer(args[0], args[1], eventCount, xmlEvents, eventInterval);
producer.sendEvents();
producer.shutdown();
}
}
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