2 * ============LICENSE_START=======================================================
3 * dcaegen2-collectors-veshv
4 * ================================================================================
5 * Copyright (C) 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.kafkaconsumer.metrics.http
22 import org.onap.dcae.collectors.veshv.kafkaconsumer.metrics.MicrometerMetrics
23 import org.onap.dcae.collectors.veshv.utils.NettyServerHandle
24 import org.onap.dcae.collectors.veshv.utils.ServerHandle
25 import org.onap.dcae.collectors.veshv.utils.logging.Logger
26 import reactor.core.publisher.Mono
27 import reactor.netty.http.server.HttpServer
28 import reactor.netty.http.server.HttpServerRequest
29 import reactor.netty.http.server.HttpServerResponse
30 import java.net.InetSocketAddress
32 internal class PrometheusApiServer(private val listenAddress: InetSocketAddress,
33 private val metrics: MicrometerMetrics) {
35 private val logger = Logger(PrometheusApiServer::class)
37 fun start(): Mono<NettyServerHandle> =
39 .tcpConfiguration { it.addressSupplier { listenAddress } }
40 .route { it.get("/monitoring/prometheus", ::metricsHandler) }
42 .map { NettyServerHandle(it) }
43 .doOnSuccess(::logServerStarted)
46 private fun metricsHandler(_req: HttpServerRequest, resp: HttpServerResponse) =
47 resp.sendString(metrics.lastStatus())
50 private fun logServerStarted(handle: ServerHandle) =
52 "Kafka Consumer API server is up and listening on ${handle.host}:${handle.port}"