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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2022-2023 Nordix Foundation.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.common.endpoints.event.comm.bus.internal;
import java.net.MalformedURLException;
import java.util.Map;
import org.onap.policy.common.endpoints.event.comm.Topic;
import org.onap.policy.common.endpoints.event.comm.bus.KafkaTopicSource;
/**
* This topic source implementation specializes in reading messages over a Kafka Bus topic source and
* notifying its listeners.
*/
public class SingleThreadedKafkaTopicSource extends SingleThreadedBusTopicSource implements KafkaTopicSource {
protected Map<String, String> additionalProps = null;
/**
* Constructor.
*
* @param busTopicParams Parameters object containing all the required inputs
* @throws IllegalArgumentException An invalid parameter passed in
*/
public SingleThreadedKafkaTopicSource(BusTopicParams busTopicParams) {
super(busTopicParams);
this.additionalProps = busTopicParams.getAdditionalProps();
try {
this.init();
} catch (Exception e) {
throw new IllegalArgumentException("ERROR during init in kafka-source: cannot create topic " + topic, e);
}
}
/**
* Initialize the Cambria client.
*/
@Override
public void init() throws MalformedURLException {
BusTopicParams.TopicParamsBuilder builder = BusTopicParams.builder()
.servers(this.servers)
.topic(this.effectiveTopic)
.fetchTimeout(this.fetchTimeout)
.consumerGroup(this.consumerGroup)
.useHttps(this.useHttps)
.allowTracing(this.allowTracing);
this.consumer = new BusConsumer.KafkaConsumerWrapper(builder
.additionalProps(this.additionalProps)
.build());
}
@Override
public CommInfrastructure getTopicCommInfrastructure() {
return Topic.CommInfrastructure.KAFKA;
}
@Override
public String toString() {
return "SingleThreadedKafkaTopicSource [getTopicCommInfrastructure()=" + getTopicCommInfrastructure()
+ ", toString()=" + super.toString() + "]";
}
}
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