code: /*
   * 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.skywalking.oap.server.webapp;
  
  import static org.yaml.snakeyaml.env.EnvScalarConstructor.ENV_FORMAT;
  import static org.yaml.snakeyaml.env.EnvScalarConstructor.ENV_TAG;
  import java.util.Collections;
  import org.yaml.snakeyaml.LoaderOptions;
  import org.yaml.snakeyaml.TypeDescription;
  import org.yaml.snakeyaml.Yaml;
  import org.yaml.snakeyaml.env.EnvScalarConstructor;
  import com.linecorp.armeria.common.SessionProtocol;
  import com.linecorp.armeria.server.HttpService;
  import com.linecorp.armeria.server.Server;
  import com.linecorp.armeria.server.file.FileService;
  import com.linecorp.armeria.server.file.HttpFile;
  import com.linecorp.armeria.server.healthcheck.HealthCheckService;
  
  public class ApplicationStartUp {
      public static void main(String[] args) throws Exception {
          final Yaml yaml = new Yaml(
              new EnvScalarConstructor(
                  new TypeDescription(Configuration.class),
                  Collections.emptyList(),
                  new LoaderOptions()));
          yaml.addImplicitResolver(ENV_TAG, ENV_FORMAT, "$");
  
          final Configuration configuration = yaml.loadAs(
              ApplicationStartUp.class.getResourceAsStream("/application.yml"),
              Configuration.class);
  
          final int port = configuration.port();
          final String[] oapServices = configuration.oapServices();
  
          final HttpService indexPage =
              HttpFile
                  .of(ApplicationStartUp.class.getClassLoader(), "/public/index.html")
                  .asService();
          final HttpService zipkinIndexPage =
              HttpFile
                  .of(ApplicationStartUp.class.getClassLoader(), "/zipkin-lens/index.html")
                  .asService();
  
          final ZipkinProxyService zipkin = new ZipkinProxyService(configuration.zipkinServices());
  
          Server
              .builder()
              .port(port, SessionProtocol.HTTP)
              .service("/graphql", new OapProxyService(oapServices))
              .service("/internal/l7check", HealthCheckService.of())
              .service("/zipkin/config.json", zipkin)
              .serviceUnder("/zipkin/api", zipkin)
              .serviceUnder("/zipkin",
                  FileService.of(
                      ApplicationStartUp.class.getClassLoader(),
                      "/zipkin-lens")
                      .orElse(zipkinIndexPage))
              .serviceUnder("/",
                  FileService.of(
                      ApplicationStartUp.class.getClassLoader(),
                      "/public")
                      .orElse(indexPage))
              .build()
              .start()
              .join();
      }
  }
  