| /* |
| * |
| * 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.hadoop.resourceestimator.service; |
| |
| import java.io.IOException; |
| import java.net.URI; |
| |
| import javax.ws.rs.core.UriBuilder; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.http.HttpServer2; |
| import org.apache.hadoop.resourceestimator.common.config.ResourceEstimatorConfiguration; |
| import org.apache.hadoop.service.CompositeService; |
| import org.apache.hadoop.util.ShutdownHookManager; |
| import org.apache.hadoop.yarn.conf.YarnConfiguration; |
| import org.apache.hadoop.yarn.webapp.GenericExceptionHandler; |
| import org.apache.hadoop.yarn.webapp.YarnJacksonJaxbJsonProvider; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * A simple embedded Hadoop HTTP server. |
| */ |
| public final class ResourceEstimatorServer extends CompositeService { |
| private static final Logger LOGGER = |
| LoggerFactory.getLogger(ResourceEstimatorServer.class.getName()); |
| private HttpServer2 webServer; |
| private static URI baseURI; |
| |
| public ResourceEstimatorServer() { |
| super(ResourceEstimatorServer.class.getName()); |
| } |
| |
| private static URI getBaseURI(Configuration config) { |
| baseURI = UriBuilder.fromUri(ResourceEstimatorConfiguration.SERVICE_URI) |
| .port(getPort(config)).build(); |
| return baseURI; |
| } |
| |
| private static int getPort(Configuration config) { |
| return config.getInt(ResourceEstimatorConfiguration.SERVICE_PORT, |
| ResourceEstimatorConfiguration.DEFAULT_SERVICE_PORT); |
| } |
| |
| @Override protected void serviceInit(Configuration conf) throws Exception { |
| super.serviceInit(conf); |
| } |
| |
| @Override protected void serviceStart() throws Exception { |
| super.serviceStart(); |
| startResourceEstimatorApp(); |
| } |
| |
| private void join() { |
| // keep the main thread that started the server up until it receives a stop |
| // signal |
| if (webServer != null) { |
| try { |
| webServer.join(); |
| } catch (InterruptedException ignore) { |
| } |
| } |
| } |
| |
| @Override protected void serviceStop() throws Exception { |
| if (webServer != null) { |
| webServer.stop(); |
| } |
| super.serviceStop(); |
| } |
| |
| private void startResourceEstimatorApp() throws IOException { |
| Configuration config = new YarnConfiguration(); |
| config.addResource(ResourceEstimatorConfiguration.CONFIG_FILE); |
| HttpServer2.Builder builder = |
| new HttpServer2.Builder().setName("ResourceEstimatorServer") |
| .setConf(config) |
| //.setFindPort(true) |
| .addEndpoint(getBaseURI(config)); |
| webServer = builder.build(); |
| webServer.addJerseyResourcePackage( |
| ResourceEstimatorService.class.getPackage().getName() + ";" |
| + GenericExceptionHandler.class.getPackage().getName() + ";" |
| + YarnJacksonJaxbJsonProvider.class.getPackage().getName(), "/*"); |
| webServer.start(); |
| } |
| |
| /** |
| * Start embedded Hadoop HTTP server. |
| * |
| * @return an instance of the started HTTP server. |
| * @throws IOException in case there is an error while starting server. |
| */ |
| static ResourceEstimatorServer startResourceEstimatorServer() |
| throws IOException, InterruptedException { |
| Configuration config = new YarnConfiguration(); |
| config.addResource(ResourceEstimatorConfiguration.CONFIG_FILE); |
| ResourceEstimatorServer resourceEstimatorServer = null; |
| try { |
| resourceEstimatorServer = new ResourceEstimatorServer(); |
| ShutdownHookManager.get().addShutdownHook( |
| new CompositeServiceShutdownHook(resourceEstimatorServer), 30); |
| resourceEstimatorServer.init(config); |
| resourceEstimatorServer.start(); |
| } catch (Throwable t) { |
| LOGGER.error("Error starting ResourceEstimatorServer", t); |
| } |
| |
| return resourceEstimatorServer; |
| } |
| |
| public static void main(String[] args) |
| throws InterruptedException, IOException { |
| ResourceEstimatorServer server = startResourceEstimatorServer(); |
| server.join(); |
| } |
| |
| /** |
| * Stop embedded Hadoop HTTP server. |
| * |
| * @throws Exception in case the HTTP server fails to shut down. |
| */ |
| public void shutdown() throws Exception { |
| LOGGER.info("Stopping resourceestimator service at: {}.", |
| baseURI.toString()); |
| webServer.stop(); |
| } |
| } |