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