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.query.zipkin;
  
  import com.linecorp.armeria.common.HttpMethod;
  import java.util.Collections;
  import org.apache.skywalking.oap.query.zipkin.handler.ZipkinQueryHandler;
  import org.apache.skywalking.oap.server.core.CoreModule;
  import org.apache.skywalking.oap.server.library.module.ModuleDefine;
  import org.apache.skywalking.oap.server.library.module.ModuleProvider;
  import org.apache.skywalking.oap.server.library.module.ModuleStartException;
  import org.apache.skywalking.oap.server.library.module.ServiceNotProvidedException;
  import org.apache.skywalking.oap.server.library.server.http.HTTPServer;
  import org.apache.skywalking.oap.server.library.server.http.HTTPServerConfig;
  import org.apache.skywalking.oap.server.telemetry.TelemetryModule;
  
  public class ZipkinQueryProvider extends ModuleProvider {
      public static final String NAME = "default";
      private ZipkinQueryConfig config;
      private HTTPServer httpServer;
  
      @Override
      public String name() {
          return NAME;
      }
  
      @Override
      public Class<? extends ModuleDefine> module() {
          return ZipkinQueryModule.class;
      }
  
      @Override
      public ConfigCreator newConfigCreator() {
          return new ConfigCreator<ZipkinQueryConfig>() {
              @Override
              public Class type() {
                  return ZipkinQueryConfig.class;
              }
  
              @Override
              public void onInitialized(final ZipkinQueryConfig initialized) {
                  config = initialized;
              }
          };
      }
  
      @Override
      public void prepare() throws ServiceNotProvidedException {
  
      }
  
      @Override
      public void start() throws ServiceNotProvidedException, ModuleStartException {
          HTTPServerConfig httpServerConfig = HTTPServerConfig.builder()
                                                              .host(config.getRestHost())
                                                              .port(config.getRestPort())
                                                              .contextPath(config.getRestContextPath())
                                                              .idleTimeOut(config.getRestIdleTimeOut())
                                                              .maxThreads(config.getRestMaxThreads())
                                                              .acceptQueueSize(config.getRestAcceptQueueSize())
                                                              .build();
  
          httpServer = new HTTPServer(httpServerConfig);
          httpServer.initialize();
          httpServer.addHandler(
              new ZipkinQueryHandler(config, getManager()),
              Collections.singletonList(HttpMethod.GET)
          );
      }
  
      @Override
      public void notifyAfterCompleted() {
          httpServer.start();
      }
  
      @Override
      public String[] requiredModules() {
          return new String[] {
              TelemetryModule.NAME,
              CoreModule.NAME
          };
      }
  }
  