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.receiver.register.provider.handler.v8;
  
  import com.google.gson.JsonObject;
  import java.util.ArrayList;
  import java.util.List;
  import org.apache.skywalking.apm.network.common.v3.Commands;
  import org.apache.skywalking.apm.network.management.v3.InstancePingPkg;
  import org.apache.skywalking.apm.network.management.v3.InstanceProperties;
  import org.apache.skywalking.oap.server.core.CoreModule;
  import org.apache.skywalking.oap.server.core.analysis.DownSampling;
  import org.apache.skywalking.oap.server.core.analysis.IDManager;
  import org.apache.skywalking.oap.server.core.analysis.Layer;
  import org.apache.skywalking.oap.server.core.analysis.TimeBucket;
  import org.apache.skywalking.oap.server.core.analysis.manual.instance.InstanceTraffic;
  import org.apache.skywalking.oap.server.core.config.NamingControl;
  import org.apache.skywalking.oap.server.core.source.ServiceInstanceUpdate;
  import org.apache.skywalking.oap.server.core.source.ServiceMeta;
  import org.apache.skywalking.oap.server.core.source.SourceReceiver;
  import org.apache.skywalking.oap.server.library.module.ModuleManager;
  import org.apache.skywalking.oap.server.library.util.StringUtil;
  
  public final class ManagementServiceHandler {
      private final SourceReceiver sourceReceiver;
      private final NamingControl namingControl;
  
      public ManagementServiceHandler(ModuleManager moduleManager) {
          this.sourceReceiver = moduleManager.find(CoreModule.NAME).provider().getService(SourceReceiver.class);
          this.namingControl = moduleManager.find(CoreModule.NAME)
                                            .provider()
                                            .getService(NamingControl.class);
      }
  
      /**
       * Identify the layer of instance. Such as ${@link Layer#FAAS}.
       */
      private Layer identifyInstanceLayer(String layer) {
          if (StringUtil.isEmpty(layer)) {
              return Layer.GENERAL;
          } else {
              return Layer.nameOf(layer);
          }
      }
  
      public Commands reportInstanceProperties(final InstanceProperties request) {
          ServiceInstanceUpdate serviceInstanceUpdate = new ServiceInstanceUpdate();
          final String serviceName = namingControl.formatServiceName(request.getService());
          final String instanceName = namingControl.formatInstanceName(request.getServiceInstance());
          serviceInstanceUpdate.setServiceId(IDManager.ServiceID.buildId(serviceName, true));
          serviceInstanceUpdate.setName(instanceName);
  
          JsonObject properties = new JsonObject();
          List<String> ipv4List = new ArrayList<>();
          request.getPropertiesList().forEach(prop -> {
              if (InstanceTraffic.PropertyUtil.IPV4.equals(prop.getKey())) {
                  ipv4List.add(prop.getValue());
              } else {
                  properties.addProperty(prop.getKey(), prop.getValue());
              }
          });
          properties.addProperty(InstanceTraffic.PropertyUtil.IPV4S, String.join(",", ipv4List));
          serviceInstanceUpdate.setProperties(properties);
          serviceInstanceUpdate.setTimeBucket(
              TimeBucket.getTimeBucket(System.currentTimeMillis(), DownSampling.Minute));
          sourceReceiver.receive(serviceInstanceUpdate);
  
          return Commands.newBuilder().build();
      }
  
      public Commands keepAlive(final InstancePingPkg request) {
          final long timeBucket = TimeBucket.getTimeBucket(System.currentTimeMillis(), DownSampling.Minute);
          final String serviceName = namingControl.formatServiceName(request.getService());
          final String instanceName = namingControl.formatInstanceName(request.getServiceInstance());
          final Layer layer = identifyInstanceLayer(request.getLayer());
  
          ServiceInstanceUpdate serviceInstanceUpdate = new ServiceInstanceUpdate();
          serviceInstanceUpdate.setServiceId(IDManager.ServiceID.buildId(serviceName, true));
          serviceInstanceUpdate.setName(instanceName);
          serviceInstanceUpdate.setTimeBucket(timeBucket);
          sourceReceiver.receive(serviceInstanceUpdate);
  
          ServiceMeta serviceMeta = new ServiceMeta();
          serviceMeta.setName(serviceName);
          serviceMeta.setTimeBucket(timeBucket);
          serviceMeta.setLayer(layer);
          sourceReceiver.receive(serviceMeta);
  
          return Commands.newBuilder().build();
      }
  }
  