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.core.Option
23 import arrow.effects.IO
24 import org.onap.dcae.collectors.veshv.utils.logging.Logger
25 import reactor.kafka.receiver.ReceiverRecord
28 * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
32 class ConsumerState(val msgCount: Long, val lastKey: Option<ByteArray>, val lastValue: Option<ByteArray>)
34 interface ConsumerStateProvider {
35 fun currentState(): ConsumerState
39 class Consumer : ConsumerStateProvider {
40 private var msgCount = 0L
41 private var lastKey: ByteArray? = null
42 private var lastValue: ByteArray? = null
44 override fun currentState() =
45 ConsumerState(msgCount, Option.fromNullable(lastKey), Option.fromNullable(lastValue))
47 override fun reset() = IO {
55 fun update(record: ReceiverRecord<ByteArray, ByteArray>) {
56 logger.trace { "Updating stats for message from ${record.topic()}:${record.partition()}" }
60 lastKey = record.key()
61 lastValue = record.value()
66 private val logger = Logger(Consumer::class)
70 class ConsumerFactory(private val kafkaBootstrapServers: String) {
71 fun createConsumerForTopics(kafkaTopics: Set<String>): ConsumerStateProvider {
72 return KafkaSource.create(kafkaBootstrapServers, kafkaTopics.toSet()).start().unsafeRunSync()