| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| |
| package org.apache.nlpcraft.server.rest |
| |
| import akka.actor.ActorSystem |
| import akka.http.scaladsl.Http |
| import akka.http.scaladsl.server._ |
| import akka.stream.Materializer |
| import io.opencensus.trace.Span |
| import org.apache.nlpcraft.common.config.NCConfigurable |
| import org.apache.nlpcraft.common.pool.NCThreadPoolManager |
| import org.apache.nlpcraft.common.{NCService, _} |
| |
| import scala.concurrent.{ExecutionContext, Future} |
| import scala.util.{Failure, Success} |
| |
| /** |
| * REST manager. |
| */ |
| object NCRestManager extends NCService { |
| private implicit val SYSTEM: ActorSystem = ActorSystem("server-rest") |
| private implicit val MATERIALIZER: Materializer = Materializer.createMaterializer(SYSTEM) |
| private implicit final val ec: ExecutionContext = NCThreadPoolManager.getSystemContext |
| |
| @volatile private var bindFut: Future[Http.ServerBinding] = _ |
| |
| private final object Config extends NCConfigurable { |
| final private val pre = "nlpcraft.server.rest" |
| |
| def host: String = getString(s"$pre.host") |
| def port: Int = getInt(s"$pre.port") |
| def apiImpl: String = getString(s"$pre.apiImpl") |
| |
| /** |
| * |
| */ |
| def check(): Unit = { |
| if (!(port > 0 && port < 65535)) |
| throw new NCE(s"Configuration property must be > 0 and < 65535 [" + |
| s"name=$pre.port, " + |
| s"value=$port" + |
| s"]") |
| if (host == null) |
| throw new NCE(s"Configuration property must be specified [" + |
| s"name=$pre.host" + |
| s"]") |
| if (apiImpl == null) |
| throw new NCE(s"Configuration property must be specified (use 'org.apache.nlpcraft.server.rest.NCBasicRestApi' as default) [" + |
| s"name=$pre.apiImpl" + |
| s"]") |
| } |
| } |
| |
| Config.check() |
| |
| /** |
| * |
| * @param parent Optional parent span. |
| * @return |
| */ |
| override def start(parent: Span = null): NCService = startScopedSpan("start", parent) { span ⇒ |
| ackStarting() |
| |
| val url = s"${Config.host}:${Config.port}" |
| val api: NCRestApi = U.mkObject(Config.apiImpl) |
| |
| addTags(span, |
| "url" → url, |
| "api" → Config.apiImpl |
| ) |
| |
| bindFut = Http().newServerAt(Config.host, Config.port).bind(Route.toFunction(api.getRoute)) |
| |
| bindFut.onComplete { |
| case Success(_) ⇒ logger.info(s"REST server is on '${c(url)}'.") |
| case Failure(_) ⇒ logger.info(s"REST server failed to start on '${c(url)}'.") |
| } |
| |
| ackStarted() |
| } |
| |
| /** |
| * |
| * @param parent Optional parent span. |
| */ |
| override def stop(parent: Span = null): Unit = startScopedSpan("stop", parent) { _ ⇒ |
| ackStopping() |
| |
| if (bindFut != null) |
| bindFut.flatMap(_.unbind()).onComplete(_ ⇒ SYSTEM.terminate()) |
| |
| ackStopped() |
| } |
| } |