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.apache.kafka.clients.consumer.ConsumerRecord
23 import org.onap.dcae.collectors.veshv.kafka.api.ConsumerFactory
24 import org.onap.dcae.collectors.veshv.kafka.api.KafkaConsumer
25 import org.onap.dcae.collectors.veshv.utils.logging.Logger
26 import java.util.concurrent.ConcurrentLinkedQueue
29 * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
32 internal class ConsumerState(private val messages: ConcurrentLinkedQueue<ByteArray>) {
33 val messagesCount: Int by lazy {
37 val consumedMessages: List<ByteArray> by lazy {
42 internal interface ConsumerStateProvider {
43 fun currentState(): ConsumerState
46 internal class Consumer : KafkaConsumer, ConsumerStateProvider {
48 private var consumedMessages: ConcurrentLinkedQueue<ByteArray> = ConcurrentLinkedQueue()
50 override fun currentState(): ConsumerState = ConsumerState(consumedMessages)
52 override fun reset() = consumedMessages.clear()
54 override fun update(record: ConsumerRecord<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 DcaeAppConsumerFactory(private val kafkaBootstrapServers: String) {
66 private val consumerProvider = { Consumer() }
68 fun createConsumersFor(topics: Set<String>) =
69 ConsumerFactory.createConsumersForTopics(kafkaBootstrapServers, topics, consumerProvider)
70 .mapValues { it.value as Consumer }