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.ves.message.generator.api
22 import reactor.core.publisher.Flux
23 import reactor.core.publisher.Mono
26 * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
29 abstract class MessageGenerator<K : MessageParameters, T> {
30 abstract fun createMessageFlux(parameters: K): Flux<T>
32 protected fun repeatMessage(message: Mono<T>, amount: Long): Flux<T> = when {
33 amount < 0 -> repeatForever(message)
34 amount == 0L -> emptyMessageStream()
35 else -> repeatNTimes(message, amount)
38 private fun repeatForever(message: Mono<T>) = message.repeat()
40 private fun emptyMessageStream() = Flux.empty<T>()
42 private fun repeatNTimes(message: Mono<T>, amount: Long) = message.repeat(amount - 1)