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 arrow.core.getOrElse
23 import org.onap.dcae.collectors.veshv.utils.arrow.getOption
24 import org.onap.dcae.collectors.veshv.utils.logging.Logger
25 import java.io.InputStream
26 import java.util.concurrent.atomic.AtomicReference
29 * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
32 class DcaeAppSimulator(private val consumerFactory: ConsumerFactory,
33 private val messageStreamValidation: MessageStreamValidation) {
34 private val consumerState: AtomicReference<ConsumerStateProvider> = AtomicReference()
36 fun listenToTopics(topicsString: String) = listenToTopics(extractTopics(topicsString))
38 fun listenToTopics(topics: Set<String>) {
39 if (topics.isEmpty() || topics.any { it.isBlank() }) {
40 val message = "Topic list cannot be empty or contain empty elements, topics: $topics"
41 logger.info { message }
42 throw IllegalArgumentException(message)
45 logger.info { "Received new configuration. Creating consumer for topics: $topics" }
46 consumerState.set(consumerFactory.createConsumerForTopics(topics))
49 fun state() = consumerState.getOption().map { it.currentState() }
51 fun resetState() = consumerState.getOption().fold({ }, { it.reset() })
54 fun validate(jsonDescription: InputStream)= messageStreamValidation.validate(jsonDescription, currentMessages())
56 private fun currentMessages(): List<ByteArray> =
57 consumerState.getOption()
58 .map { it.currentState().consumedMessages }
59 .getOrElse(::emptyList)
61 private fun extractTopics(topicsString: String): Set<String> =
62 topicsString.substringAfter("=")
67 private val logger = Logger(DcaeAppSimulator::class)