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.jvm.provider.handler;
  
  import io.grpc.stub.StreamObserver;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.skywalking.apm.network.common.v3.Commands;
  import org.apache.skywalking.apm.network.language.agent.v3.JVMMetricCollection;
  import org.apache.skywalking.apm.network.language.agent.v3.JVMMetricReportServiceGrpc;
  import org.apache.skywalking.oap.server.analyzer.provider.jvm.JVMSourceDispatcher;
  import org.apache.skywalking.oap.server.core.CoreModule;
  import org.apache.skywalking.oap.server.core.config.NamingControl;
  import org.apache.skywalking.oap.server.library.module.ModuleManager;
  import org.apache.skywalking.oap.server.library.server.grpc.GRPCHandler;
  
  @Slf4j
  public class JVMMetricReportServiceHandler extends JVMMetricReportServiceGrpc.JVMMetricReportServiceImplBase implements GRPCHandler {
      private final JVMSourceDispatcher jvmSourceDispatcher;
      private final NamingControl namingControl;
  
      public JVMMetricReportServiceHandler(ModuleManager moduleManager) {
          this.jvmSourceDispatcher = new JVMSourceDispatcher(moduleManager);
          this.namingControl = moduleManager.find(CoreModule.NAME)
                                            .provider()
                                            .getService(NamingControl.class);
      }
  
      @Override
      public void collect(JVMMetricCollection request, StreamObserver<Commands> responseObserver) {
          if (log.isDebugEnabled()) {
              log.debug(
                  "receive the jvm metrics from service instance, name: {}, instance: {}",
                  request.getService(),
                  request.getServiceInstance()
              );
          }
          final JVMMetricCollection.Builder builder = request.toBuilder();
          builder.setService(namingControl.formatServiceName(builder.getService()));
          builder.setServiceInstance(namingControl.formatInstanceName(builder.getServiceInstance()));
  
          builder.getMetricsList().forEach(jvmMetric -> {
              jvmSourceDispatcher.sendMetric(builder.getService(), builder.getServiceInstance(), jvmMetric);
          });
  
          responseObserver.onNext(Commands.newBuilder().build());
          responseObserver.onCompleted();
      }
  
  }