2 * ============LICENSE_START=======================================================
3 * dcaegen2-collectors-veshv
4 * ================================================================================
5 * Copyright (C) 2018-2019 NOKIA
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
20 package org.onap.dcae.collectors.veshv.simulators.dcaeapp.impl
22 import org.onap.dcae.collectors.veshv.simulators.dcaeapp.impl.adapters.KafkaSource
23 import org.onap.dcae.collectors.veshv.utils.logging.Logger
24 import reactor.kafka.receiver.ReceiverRecord
25 import java.util.concurrent.ConcurrentLinkedQueue
28 * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
31 internal class ConsumerState(private val messages: ConcurrentLinkedQueue<ByteArray>) {
32 val messagesCount: Int by lazy {
36 val consumedMessages: List<ByteArray> by lazy {
41 internal interface ConsumerStateProvider {
42 fun currentState(): ConsumerState
46 internal class Consumer : ConsumerStateProvider {
48 private var consumedMessages: ConcurrentLinkedQueue<ByteArray> = ConcurrentLinkedQueue()
50 override fun currentState(): ConsumerState = ConsumerState(consumedMessages)
52 override fun reset() = consumedMessages.clear()
54 fun update(record: ReceiverRecord<ByteArray, ByteArray>) {
55 logger.trace { "Updating stats for message from ${record.topic()}:${record.partition()}" }
56 consumedMessages.add(record.value())
60 private val logger = Logger(Consumer::class)
64 internal class ConsumerFactory(private val kafkaBootstrapServers: String) {
65 fun createConsumersForTopics(kafkaTopics: Set<String>): Map<String, Consumer> =
66 KafkaSource.create(kafkaBootstrapServers, kafkaTopics).let { kafkaSource ->
67 val topicToConsumer = kafkaTopics.associate { it to Consumer() }
70 val topic = it.topic()
71 topicToConsumer.get(topic)?.update(it)
72 ?: logger.warn { "No consumer configured for topic $topic" }
78 private val logger = Logger(ConsumerFactory::class)