testsuites/integration/integration-uservice-test/src/test/java/org/onap/policy/apex/testsuites/integration/uservice/adapt/kafka/KafkaEventProducer.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
   4  *  Modifications Copyright (C) 2019-2020 Nordix Foundation.
   5  * ================================================================================
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *      http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  *
  18  * SPDX-License-Identifier: Apache-2.0
  19  * ============LICENSE_END=========================================================
  20  */
  21
  22 package org.onap.policy.apex.testsuites.integration.uservice.adapt.kafka;
  23
  24 import com.salesforce.kafka.test.junit4.SharedKafkaTestResource;
  25
  26 import java.time.Duration;
  27
  28 import org.apache.kafka.clients.producer.Producer;
  29 import org.apache.kafka.clients.producer.ProducerRecord;
  30 import org.apache.kafka.common.serialization.StringSerializer;
  31 import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities;
  32 import org.onap.policy.apex.testsuites.integration.uservice.adapt.events.EventGenerator;
  33 import org.slf4j.Logger;
  34 import org.slf4j.LoggerFactory;
  35
  36 /**
  37  * The Class KafkaEventProducer.
  38  *
  39  * @author Liam Fallon (liam.fallon@ericsson.com)
  40  */
  41 public class KafkaEventProducer implements Runnable {
  42     // Get a reference to the logger
  43     private static final Logger LOGGER = LoggerFactory.getLogger(KafkaEventProducer.class);
  44
  45     private final String topic;
  46     private final SharedKafkaTestResource sharedKafkaTestResource;
  47     private final int eventCount;
  48     private final boolean xmlEvents;
  49     private final long eventInterval;
  50     private long eventsSentCount = 0;
  51
  52     private final Thread producerThread;
  53     private boolean sendEventsFlag = false;
  54     private volatile boolean stopFlag = false;
  55
  56     /**
  57      * Instantiates a new kafka event producer.
  58      *
  59      * @param topic the topic
  60      * @param sharedKafkaTestResource the kafka server address
  61      * @param eventCount the event count
  62      * @param xmlEvents the xml events
  63      * @param eventInterval the event interval
  64      */
  65     public KafkaEventProducer(final String topic, final SharedKafkaTestResource sharedKafkaTestResource,
  66         final int eventCount, final boolean xmlEvents, final long eventInterval) {
  67         this.topic = topic;
  68         this.sharedKafkaTestResource = sharedKafkaTestResource;
  69         this.eventCount = eventCount;
  70         this.xmlEvents = xmlEvents;
  71         this.eventInterval = eventInterval;
  72
  73         producerThread = new Thread(this);
  74         producerThread.start();
  75     }
  76
  77     /**
  78      * {@inheritDoc}.
  79      */
  80     @Override
  81     public void run() {
  82         final Producer<String, String> producer = sharedKafkaTestResource.getKafkaTestUtils()
  83             .getKafkaProducer(StringSerializer.class, StringSerializer.class);
  84
  85         while (producerThread.isAlive() && !stopFlag) {
  86             ThreadUtilities.sleep(50);
  87
  88             if (sendEventsFlag) {
  89                 sendEventsToTopic(producer);
  90                 sendEventsFlag = false;
  91             }
  92         }
  93
  94         producer.close(Duration.ofMillis(1000));
  95     }
  96
  97     /**
  98      * Send events.
  99      */
 100     public void sendEvents() {
 101         sendEventsFlag = true;
 102     }
 103
 104     /**
 105      * Send events to topic.
 106      *
 107      * @param producer the producer
 108      */
 109     private void sendEventsToTopic(final Producer<String, String> producer) {
 110         LOGGER.debug("{} : sending events to Kafka server, event count {}, xmlEvents {}",
 111             KafkaEventProducer.class.getName(), eventCount, xmlEvents);
 112
 113         for (int i = 0; i < eventCount; i++) {
 114             LOGGER.debug("{} : waiting {} milliseconds before sending next event", KafkaEventProducer.class.getName(),
 115                 eventInterval);
 116             ThreadUtilities.sleep(eventInterval);
 117
 118             String eventString = null;
 119             if (xmlEvents) {
 120                 eventString = EventGenerator.xmlEvent();
 121             } else {
 122                 eventString = EventGenerator.jsonEvent();
 123             }
 124             producer.send(new ProducerRecord<String, String>(topic, "Event" + i + "Of" + eventCount, eventString));
 125             producer.flush();
 126             eventsSentCount++;
 127             LOGGER.debug("****** Sent event No. {} ******\n{}", eventsSentCount, eventString);
 128         }
 129         LOGGER.debug("{}: completed", KafkaEventProducer.class.getName());
 130     }
 131
 132     /**
 133      * Gets the events sent count.
 134      *
 135      * @return the events sent count
 136      */
 137     public long getEventsSentCount() {
 138         return eventsSentCount;
 139     }
 140
 141     /**
 142      * Shutdown.
 143      */
 144     public void shutdown() {
 145         LOGGER.debug("{} : stopping", KafkaEventProducer.class.getName());
 146
 147         stopFlag = true;
 148
 149         while (producerThread.isAlive()) {
 150             ThreadUtilities.sleep(10);
 151         }
 152
 153         LOGGER.debug("{} : stopped", KafkaEventProducer.class.getName());
 154     }
 155
 156     public boolean isAlive() {
 157         return producerThread.isAlive();
 158     }
 159 }