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.impl
22 import arrow.effects.IO
23 import org.onap.dcae.collectors.veshv.simulators.dcaeapp.impl.adapters.KafkaSource
24 import org.onap.dcae.collectors.veshv.utils.logging.Logger
25 import reactor.kafka.receiver.ReceiverRecord
26 import java.util.concurrent.ConcurrentLinkedQueue
29 * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
32 class ConsumerState(private val messages: ConcurrentLinkedQueue<ByteArray>) {
33 val messagesCount: Int by lazy {
37 val consumedMessages: List<ByteArray> by lazy {
42 interface ConsumerStateProvider {
43 fun currentState(): ConsumerState
47 class Consumer : ConsumerStateProvider {
49 private var consumedMessages: ConcurrentLinkedQueue<ByteArray> = ConcurrentLinkedQueue()
51 override fun currentState(): ConsumerState = ConsumerState(consumedMessages)
53 override fun reset(): IO<Unit> = IO {
54 consumedMessages.clear()
57 fun update(record: ReceiverRecord<ByteArray, ByteArray>) = IO<Unit> {
58 logger.trace { "Updating stats for message from ${record.topic()}:${record.partition()}" }
59 consumedMessages.add(record.value())
63 private val logger = Logger(Consumer::class)
67 class ConsumerFactory(private val kafkaBootstrapServers: String) {
68 fun createConsumerForTopics(kafkaTopics: Set<String>): IO<Consumer> =
69 KafkaSource.create(kafkaBootstrapServers, kafkaTopics.toSet()).start()