2 * Copyright © 2018-2019 AT&T Intellectual Property.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.onap.ccsdk.cds.blueprintsprocessor.message.service
19 import kotlinx.coroutines.channels.Channel
20 import org.apache.kafka.clients.consumer.ConsumerRecord
21 import org.apache.kafka.streams.KafkaStreams
22 import org.onap.ccsdk.cds.blueprintsprocessor.message.MessageConsumerProperties
23 import org.onap.ccsdk.cds.controllerblueprints.core.BluePrintProcessorException
24 import org.onap.ccsdk.cds.controllerblueprints.core.logger
25 import java.util.Properties
27 open class KafkaStreamsConsumerService(private val messageConsumerProperties: MessageConsumerProperties) :
28 BlueprintMessageConsumerService {
30 val log = logger(KafkaStreamsConsumerService::class)
31 lateinit var kafkaStreams: KafkaStreams
33 private fun streamsConfig(additionalConfig: Map<String, Any>? = null): Properties {
34 val configProperties = Properties()
35 /** set consumer properties */
36 messageConsumerProperties.getConfig().let { configProperties.putAll(it) }
37 /** add or override already set properties */
38 additionalConfig?.let { configProperties.putAll(it) }
39 /** Create Kafka consumer */
40 return configProperties
43 override suspend fun subscribe(additionalConfig: Map<String, Any>?): Channel<ConsumerRecord<String, ByteArray>> {
44 throw BluePrintProcessorException("not implemented")
47 override suspend fun subscribe(topics: List<String>, additionalConfig: Map<String, Any>?): Channel<ConsumerRecord<String, ByteArray>> {
48 throw BluePrintProcessorException("not implemented")
51 override suspend fun consume(additionalConfig: Map<String, Any>?, consumerFunction: ConsumerFunction) {
52 val streamsConfig = streamsConfig(additionalConfig)
53 val kafkaStreamConsumerFunction = consumerFunction as KafkaStreamConsumerFunction
54 val topology = kafkaStreamConsumerFunction.createTopology(messageConsumerProperties, additionalConfig)
55 log.info("Kafka streams topology : ${topology.describe()}")
56 kafkaStreams = KafkaStreams(topology, streamsConfig)
57 kafkaStreams.cleanUp()
59 kafkaStreams.localThreadsMetadata().forEach { data -> log.info("Topology : $data") }
62 override suspend fun shutDown() {
63 if (kafkaStreams != null) {