gerrit.onap Code Review - policy/apex-pdp.git/blob

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