2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2022-2023 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.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.cps.ncmp.api.impl.events;
23 import io.cloudevents.CloudEvent;
25 import java.util.concurrent.CompletableFuture;
26 import lombok.RequiredArgsConstructor;
27 import lombok.extern.slf4j.Slf4j;
28 import org.apache.kafka.clients.producer.ProducerRecord;
29 import org.apache.kafka.common.header.Headers;
30 import org.apache.kafka.common.header.internals.RecordHeaders;
31 import org.springframework.kafka.core.KafkaTemplate;
32 import org.springframework.kafka.support.SendResult;
33 import org.springframework.stereotype.Service;
34 import org.springframework.util.SerializationUtils;
37 * EventsPublisher to publish events.
42 @RequiredArgsConstructor
43 public class EventsPublisher<T> {
46 * KafkaTemplate for legacy (non-cloud) events.
47 * Note: Cloud events should be used. This will be addressed as part of https://jira.onap.org/browse/CPS-1717.
49 private final KafkaTemplate<String, T> legacyKafkaEventTemplate;
51 private final KafkaTemplate<String, CloudEvent> cloudEventKafkaTemplate;
54 * Generic CloudEvent publisher.
56 * @param topicName valid topic name
57 * @param eventKey message key
58 * @param event message payload
60 public void publishCloudEvent(final String topicName, final String eventKey, final CloudEvent event) {
61 final CompletableFuture<SendResult<String, CloudEvent>> eventFuture =
62 cloudEventKafkaTemplate.send(topicName, eventKey, event);
63 eventFuture.whenComplete((result, e) -> {
65 log.debug("Successfully published event to topic : {} , Event : {}", result.getRecordMetadata().topic(),
66 result.getProducerRecord().value());
69 log.error("Unable to publish event to topic : {} due to {}", topicName, e.getMessage());
75 * Generic Event publisher.
76 * Note: Cloud events should be used. This will be addressed as part of https://jira.onap.org/browse/CPS-1717.
78 * @param topicName valid topic name
79 * @param eventKey message key
80 * @param event message payload
82 public void publishEvent(final String topicName, final String eventKey, final T event) {
83 final CompletableFuture<SendResult<String, T>> eventFuture =
84 legacyKafkaEventTemplate.send(topicName, eventKey, event);
85 handleLegacyEventCallback(topicName, eventFuture);
89 * Generic Event Publisher with headers.
91 * @param topicName valid topic name
92 * @param eventKey message key
93 * @param eventHeaders event headers
94 * @param event message payload
96 public void publishEvent(final String topicName, final String eventKey, final Headers eventHeaders, final T event) {
98 final ProducerRecord<String, T> producerRecord =
99 new ProducerRecord<>(topicName, null, eventKey, event, eventHeaders);
100 final CompletableFuture<SendResult<String, T>> eventFuture = legacyKafkaEventTemplate.send(producerRecord);
101 handleLegacyEventCallback(topicName, eventFuture);
105 * Generic Event Publisher with headers.
107 * @param topicName valid topic name
108 * @param eventKey message key
109 * @param eventHeaders map of event headers
110 * @param event message payload
112 public void publishEvent(final String topicName, final String eventKey, final Map<String, Object> eventHeaders,
115 publishEvent(topicName, eventKey, convertToKafkaHeaders(eventHeaders), event);
118 private void handleLegacyEventCallback(final String topicName,
119 final CompletableFuture<SendResult<String, T>> eventFuture) {
120 eventFuture.whenComplete((result, e) -> {
122 log.error("Unable to publish event to topic : {} due to {}", topicName, e.getMessage());
124 log.debug("Successfully published event to topic : {} , Event : {}", result.getRecordMetadata().topic(),
125 result.getProducerRecord().value());
130 private Headers convertToKafkaHeaders(final Map<String, Object> eventMessageHeaders) {
131 final Headers eventHeaders = new RecordHeaders();
132 eventMessageHeaders.forEach((key, value) -> eventHeaders.add(key, SerializationUtils.serialize(value)));