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.healthcheck.factory
22 import arrow.effects.IO
23 import io.netty.handler.codec.http.HttpResponseStatus
24 import org.onap.dcae.collectors.veshv.healthcheck.api.HealthDescription
25 import org.onap.dcae.collectors.veshv.healthcheck.api.HealthState
26 import org.onap.dcae.collectors.veshv.healthcheck.ports.PrometheusMetricsProvider
27 import org.onap.dcae.collectors.veshv.utils.NettyServerHandle
28 import org.onap.dcae.collectors.veshv.utils.ServerHandle
29 import org.onap.dcae.collectors.veshv.utils.logging.Logger
30 import reactor.core.publisher.Flux
31 import reactor.core.publisher.Mono
32 import reactor.netty.http.server.HttpServer
33 import reactor.netty.http.server.HttpServerRequest
34 import reactor.netty.http.server.HttpServerResponse
35 import java.net.SocketAddress
36 import java.util.concurrent.atomic.AtomicReference
39 * @author Jakub Dudycz <jakub.dudycz@nokia.com>
42 class HealthCheckApiServer(private val healthState: HealthState,
43 private val monitoring: PrometheusMetricsProvider,
44 private val listenAddress: SocketAddress) {
46 private val healthDescription: AtomicReference<HealthDescription> = AtomicReference(HealthDescription.STARTING)
48 fun start(): IO<ServerHandle> = IO {
49 healthState().subscribe(healthDescription::set)
50 val ctx = HttpServer.create()
52 it.addressSupplier { listenAddress }
53 .doOnUnbound { logClose() }
56 routes.get("/health/ready", ::readinessHandler)
57 routes.get("/health/alive", ::livenessHandler)
58 routes.get("/monitoring/prometheus", ::monitoringHandler)
60 NettyServerHandle(ctx.bindNow())
63 private fun readinessHandler(_req: HttpServerRequest, resp: HttpServerResponse) =
64 healthDescription.get().run {
65 logger.debug { "Component status: $status, $message" }
66 resp.status(status.httpResponseStatus.number).sendString(Flux.just(status.toString(), "\n", message))
69 private fun livenessHandler(_req: HttpServerRequest, resp: HttpServerResponse) =
70 resp.status(HttpResponseStatus.NOT_IMPLEMENTED).sendString(Mono.just("Not implemented yet"))
73 private fun monitoringHandler(_req: HttpServerRequest, resp: HttpServerResponse) =
74 resp.sendString(monitoring.lastStatus())
76 private fun logClose() {
77 logger.info { "Health Check API closed" }
81 private val logger = Logger(HealthCheckApiServer::class)