2 * ============LICENSE_START=======================================================
3 * dcaegen2-collectors-veshv
4 * ================================================================================
5 * Copyright (C) 2018 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.kafka
22 import arrow.effects.IO
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 class ConsumerState(private val messages: ConcurrentLinkedQueue<ByteArray>){
32 val messagesCount: Int by lazy {
36 val consumedMessages: List<ByteArray> by lazy {
41 interface ConsumerStateProvider {
42 fun currentState(): ConsumerState
46 class Consumer : ConsumerStateProvider {
48 private var consumedMessages: ConcurrentLinkedQueue<ByteArray> = ConcurrentLinkedQueue()
50 override fun currentState(): ConsumerState = ConsumerState(consumedMessages)
52 override fun reset(): IO<Unit> = IO {
53 consumedMessages.clear()
56 fun update(record: ReceiverRecord<ByteArray, ByteArray>) {
57 logger.trace { "Updating stats for message from ${record.topic()}:${record.partition()}" }
58 consumedMessages.add(record.value())
63 private val logger = Logger(Consumer::class)
67 class ConsumerFactory(private val kafkaBootstrapServers: String) {
68 fun createConsumerForTopics(kafkaTopics: Set<String>): ConsumerStateProvider {
69 return KafkaSource.create(kafkaBootstrapServers, kafkaTopics.toSet()).start().unsafeRunSync()