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 import java.time.Duration;
  26 import org.apache.kafka.clients.producer.Producer;
  27 import org.apache.kafka.clients.producer.ProducerRecord;
  28 import org.apache.kafka.common.serialization.StringSerializer;
  29 import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities;
  30 import org.onap.policy.apex.testsuites.integration.uservice.adapt.events.EventGenerator;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 /**
  35  * The Class KafkaEventProducer.
  36  *
  37  * @author Liam Fallon (liam.fallon@ericsson.com)
  38  */
  39 public class KafkaEventProducer implements Runnable {
  40     // Get a reference to the logger
  41     private static final Logger LOGGER = LoggerFactory.getLogger(KafkaEventProducer.class);
  42
  43     private final String topic;
  44     private final SharedKafkaTestResource sharedKafkaTestResource;
  45     private final int eventCount;
  46     private final boolean xmlEvents;
  47     private final long eventInterval;
  48     private long eventsSentCount = 0;
  49
  50     private final Thread producerThread;
  51     private boolean sendEventsFlag = false;
  52     private volatile boolean stopFlag = false;
  53
  54     /**
  55      * Instantiates a new kafka event producer.
  56      *
  57      * @param topic the topic
  58      * @param sharedKafkaTestResource the kafka server address
  59      * @param eventCount the event count
  60      * @param xmlEvents the xml events
  61      * @param eventInterval the event interval
  62      */
  63     public KafkaEventProducer(final String topic, final SharedKafkaTestResource sharedKafkaTestResource,
  64         final int eventCount, final boolean xmlEvents, final long eventInterval) {
  65         this.topic = topic;
  66         this.sharedKafkaTestResource = sharedKafkaTestResource;
  67         this.eventCount = eventCount;
  68         this.xmlEvents = xmlEvents;
  69         this.eventInterval = eventInterval;
  70
  71         producerThread = new Thread(this);
  72         producerThread.start();
  73     }
  74
  75     /**
  76      * {@inheritDoc}.
  77      */
  78     @Override
  79     public void run() {
  80         final Producer<String, String> producer = sharedKafkaTestResource.getKafkaTestUtils()
  81             .getKafkaProducer(StringSerializer.class, StringSerializer.class);
  82
  83         while (producerThread.isAlive() && !stopFlag) {
  84             ThreadUtilities.sleep(50);
  85
  86             if (sendEventsFlag) {
  87                 sendEventsToTopic(producer);
  88                 sendEventsFlag = false;
  89             }
  90         }
  91
  92         producer.close(Duration.ofMillis(1000));
  93     }
  94
  95     /**
  96      * Send events.
  97      */
  98     public void sendEvents() {
  99         sendEventsFlag = true;
 100     }
 101
 102     /**
 103      * Send events to topic.
 104      *
 105      * @param producer the producer
 106      */
 107     private void sendEventsToTopic(final Producer<String, String> producer) {
 108         LOGGER.debug("{} : sending events to Kafka server, event count {}, xmlEvents {}",
 109             KafkaEventProducer.class.getName(), eventCount, xmlEvents);
 110
 111         for (int i = 0; i < eventCount; i++) {
 112             LOGGER.debug("{} : waiting {} milliseconds before sending next event", KafkaEventProducer.class.getName(),
 113                 eventInterval);
 114             ThreadUtilities.sleep(eventInterval);
 115
 116             String eventString = null;
 117             if (xmlEvents) {
 118                 eventString = EventGenerator.xmlEvent();
 119             } else {
 120                 eventString = EventGenerator.jsonEvent();
 121             }
 122             producer.send(new ProducerRecord<String, String>(topic, "Event" + i + "Of" + eventCount, eventString));
 123             producer.flush();
 124             eventsSentCount++;
 125             LOGGER.debug("****** Sent event No. {} ******\n{}", eventsSentCount, eventString);
 126         }
 127         LOGGER.debug("{}: completed", KafkaEventProducer.class.getName());
 128     }
 129
 130     /**
 131      * Gets the events sent count.
 132      *
 133      * @return the events sent count
 134      */
 135     public long getEventsSentCount() {
 136         return eventsSentCount;
 137     }
 138
 139     /**
 140      * Shutdown.
 141      */
 142     public void shutdown() {
 143         LOGGER.debug("{} : stopping", KafkaEventProducer.class.getName());
 144
 145         stopFlag = true;
 146
 147         while (producerThread.isAlive()) {
 148             ThreadUtilities.sleep(10);
 149         }
 150
 151         LOGGER.debug("{} : stopped", KafkaEventProducer.class.getName());
 152     }
 153
 154     public boolean isAlive() {
 155         return producerThread.isAlive();
 156     }
 157 }