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/*
* ============LICENSE_START=======================================================
* dcaegen2-collectors-veshv
* ================================================================================
* Copyright (C) 2019 NOKIA
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.dcae.collectors.veshv.kafkaconsumer.metrics.http
import org.onap.dcae.collectors.veshv.kafkaconsumer.metrics.MicrometerMetrics
import org.onap.dcae.collectors.veshv.utils.NettyServerHandle
import org.onap.dcae.collectors.veshv.utils.ServerHandle
import org.onap.dcae.collectors.veshv.utils.logging.Logger
import reactor.core.publisher.Mono
import reactor.netty.http.server.HttpServer
import reactor.netty.http.server.HttpServerRequest
import reactor.netty.http.server.HttpServerResponse
import java.net.InetSocketAddress
internal class PrometheusApiServer(private val listenAddress: InetSocketAddress,
private val metrics: MicrometerMetrics) {
private val logger = Logger(PrometheusApiServer::class)
fun start(): Mono<NettyServerHandle> =
HttpServer.create()
.tcpConfiguration { it.addressSupplier { listenAddress } }
.route { it.get("/monitoring/prometheus", ::metricsHandler) }
.bind()
.map { NettyServerHandle(it) }
.doOnSuccess(::logServerStarted)
private fun metricsHandler(_req: HttpServerRequest, resp: HttpServerResponse) =
resp.sendString(metrics.lastStatus())
private fun logServerStarted(handle: ServerHandle) =
logger.info {
"Kafka Consumer API server is up and listening on ${handle.host}:${handle.port}"
}
}
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