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.Option
23 import org.onap.dcae.collectors.veshv.utils.logging.Logger
24 import java.io.InputStream
25 import java.util.Collections.synchronizedMap
28 * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
31 class DcaeAppSimulator(private val consumerFactory: ConsumerFactory,
32 private val messageStreamValidation: MessageStreamValidation) {
33 private val consumerState: MutableMap<String, ConsumerStateProvider> = synchronizedMap(mutableMapOf())
35 fun listenToTopics(topicsString: String) = listenToTopics(extractTopics(topicsString))
37 fun listenToTopics(topics: Set<String>) {
38 if (topics.isEmpty() || topics.any { it.isBlank() }) {
39 val message = "Topic list cannot be empty or contain empty elements, topics: $topics"
40 logger.info { message }
41 throw IllegalArgumentException(message)
44 logger.info { "Received new configuration. Removing old consumers and creating consumers for topics: $topics" }
45 synchronized(consumerState) {
47 consumerState.putAll(consumerFactory.createConsumersForTopics(topics))
51 fun state(topic: String) =
53 .map(ConsumerStateProvider::currentState)
55 val message = "Failed to return consumer state. No consumer found for topic: $topic"
56 logger.warn { message }
57 MissingConsumerException(message)
60 fun resetState(topic: String) =
64 val message = "Failed to reset consumer state. No consumer found for topic: $topic"
65 logger.warn { message }
66 MissingConsumerException(message)
69 fun validate(jsonDescription: InputStream, topic: String) =
70 messageStreamValidation.validate(jsonDescription, currentMessages(topic))
72 private fun consumerState(topic: String) = Option.fromNullable(consumerState[topic])
75 private fun currentMessages(topic: String): List<ByteArray> =
76 state(topic).fold({ emptyList() }, { it.consumedMessages })
78 private fun extractTopics(topicsString: String): Set<String> =
79 topicsString.removeSurrounding("\"")
84 private val logger = Logger(DcaeAppSimulator::class)
88 class MissingConsumerException(message: String) : Throwable(message)