2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2022 Nordix Foundation.
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
9 * http://www.apache.org/licenses/LICENSE-2.0
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 * ============LICENSE_END=========================================================
19 package org.onap.policy.common.endpoints.event.comm.bus.internal;
21 import java.net.MalformedURLException;
23 import org.onap.policy.common.endpoints.event.comm.Topic;
24 import org.onap.policy.common.endpoints.event.comm.bus.KafkaTopicSource;
27 * This topic source implementation specializes in reading messages over an Kafka Bus topic source and
28 * notifying its listeners.
30 public class SingleThreadedKafkaTopicSource extends SingleThreadedBusTopicSource implements KafkaTopicSource {
32 protected Map<String, String> additionalProps = null;
37 * @param busTopicParams Parameters object containing all the required inputs
38 * @throws IllegalArgumentException An invalid parameter passed in
40 public SingleThreadedKafkaTopicSource(BusTopicParams busTopicParams) {
41 super(busTopicParams);
42 this.additionalProps = busTopicParams.getAdditionalProps();
45 } catch (Exception e) {
46 throw new IllegalArgumentException("ERROR during init in kafka-source: cannot create topic " + topic, e);
51 * Initialize the Cambria client.
54 public void init() throws MalformedURLException {
55 BusTopicParams.TopicParamsBuilder builder = BusTopicParams.builder()
56 .servers(this.servers)
57 .topic(this.effectiveTopic)
58 .fetchTimeout(this.fetchTimeout)
59 .consumerGroup(this.consumerGroup)
60 .useHttps(this.useHttps);
62 this.consumer = new BusConsumer.KafkaConsumerWrapper(builder
63 .additionalProps(this.additionalProps)
68 public CommInfrastructure getTopicCommInfrastructure() {
69 return Topic.CommInfrastructure.KAFKA;
73 public String toString() {
74 return "SingleThreadedKafkaTopicSource [getTopicCommInfrastructure()=" + getTopicCommInfrastructure()
75 + ", toString()=" + super.toString() + "]";