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/*
* ============LICENSE_START=======================================================
* policy-endpoints
* ================================================================================
* Copyright (C) 2017-2021 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2018 Samsung Electronics Co., Ltd.
* Modifications Copyright (C) 2020,2023 Bell Canada. All rights reserved.
* Modifications Copyright (C) 2022-2024 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 io.opentelemetry.instrumentation.kafkaclients.v2_6.TracingProducerInterceptor;
import java.util.Properties;
import java.util.UUID;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public interface BusPublisher {
String NO_MESSAGE_PROVIDED = "No message provided";
String LOG_CLOSE = "{}: CLOSE";
String LOG_CLOSE_FAILED = "{}: CLOSE FAILED";
/**
* sends a message.
*
* @param partitionId id
* @param message the message
* @return true if success, false otherwise
* @throws IllegalArgumentException if no message provided
*/
boolean send(String partitionId, String message);
/**
* closes the publisher.
*/
void close();
/**
* Kafka based library publisher.
*/
class KafkaPublisherWrapper implements BusPublisher {
private static final Logger logger = LoggerFactory.getLogger(KafkaPublisherWrapper.class);
private static final String KEY_SERIALIZER = "org.apache.kafka.common.serialization.StringSerializer";
private final String topic;
/**
* Kafka publisher.
*/
private final Producer<String, String> producer;
protected Properties kafkaProps;
/**
* Kafka Publisher Wrapper.
*
* @param busTopicParams topic parameters
*/
protected KafkaPublisherWrapper(BusTopicParams busTopicParams) {
if (busTopicParams.isTopicInvalid()) {
throw new IllegalArgumentException("No topic for Kafka");
}
this.topic = busTopicParams.getTopic();
// Setup Properties for consumer
kafkaProps = new Properties();
kafkaProps.setProperty(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, busTopicParams.getServers().get(0));
if (busTopicParams.isAdditionalPropsValid()) {
kafkaProps.putAll(busTopicParams.getAdditionalProps());
}
if (kafkaProps.get(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG) == null) {
kafkaProps.setProperty(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, KEY_SERIALIZER);
}
if (kafkaProps.get(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG) == null) {
kafkaProps.setProperty(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, KEY_SERIALIZER);
}
if (busTopicParams.isAllowTracing()) {
kafkaProps.setProperty(ProducerConfig.INTERCEPTOR_CLASSES_CONFIG,
TracingProducerInterceptor.class.getName());
}
producer = new KafkaProducer<>(kafkaProps);
}
@Override
public boolean send(String partitionId, String message) {
if (message == null) {
throw new IllegalArgumentException(NO_MESSAGE_PROVIDED);
}
try {
// Create the record
ProducerRecord<String, String> producerRecord =
new ProducerRecord<>(topic, UUID.randomUUID().toString(), message);
this.producer.send(producerRecord);
producer.flush();
} catch (Exception e) {
logger.warn("{}: SEND of {} cannot be performed because of {}", this, message, e.getMessage(), e);
return false;
}
return true;
}
@Override
public void close() {
logger.info(LOG_CLOSE, this);
try {
this.producer.close();
} catch (Exception e) {
logger.warn("{}: CLOSE FAILED because of {}", this, e.getMessage(), e);
}
}
@Override
public String toString() {
return "KafkaPublisherWrapper []";
}
}
}
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