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.e2e.controller;
  
  import io.grpc.ManagedChannel;
  import io.grpc.internal.DnsNameResolverProvider;
  import io.grpc.netty.NettyChannelBuilder;
  import io.grpc.stub.StreamObserver;
  import java.time.LocalDateTime;
  import java.time.ZoneOffset;
  import java.util.concurrent.CountDownLatch;
  import org.apache.skywalking.apm.network.common.v3.DetectPoint;
  import org.apache.skywalking.apm.network.servicemesh.v3.HTTPServiceMeshMetric;
  import org.apache.skywalking.apm.network.servicemesh.v3.HTTPServiceMeshMetrics;
  import org.apache.skywalking.apm.network.servicemesh.v3.MeshProbeDownstream;
  import org.apache.skywalking.apm.network.servicemesh.v3.Protocol;
  import org.apache.skywalking.apm.network.servicemesh.v3.ServiceMeshMetrics;
  import org.apache.skywalking.apm.network.servicemesh.v3.ServiceMeshMetricServiceGrpc;
  import org.apache.skywalking.e2e.E2EConfiguration;
  import org.springframework.web.bind.annotation.PathVariable;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RestController;
  
  @RestController
  public class ServiceMeshMetricSenderController {
      private static final int MAX_INBOUND_MESSAGE_SIZE = 1024 * 1024 * 50;
      private static final boolean SUCCESS = true;
      private final ServiceMeshMetricServiceGrpc.ServiceMeshMetricServiceStub grpcStub;
  
      public ServiceMeshMetricSenderController(final E2EConfiguration configuration) {
          final ManagedChannel channel = NettyChannelBuilder.forAddress(
              configuration.getOapHost(), Integer.parseInt(configuration.getOapGrpcPort()))
                                                            .nameResolverFactory(new DnsNameResolverProvider())
                                                            .maxInboundMessageSize(MAX_INBOUND_MESSAGE_SIZE)
                                                            .usePlaintext()
                                                            .build();
  
          grpcStub = ServiceMeshMetricServiceGrpc.newStub(channel);
      }
  
      @PostMapping("/sendMetrics4TTL/{metricsTTL}")
      public String sendMetrics4TTL(@PathVariable("metricsTTL") int metricsTTL) throws Exception {
          final HTTPServiceMeshMetric.Builder builder =
              HTTPServiceMeshMetric
                  .newBuilder()
                  .setSourceServiceName("e2e-test-source-service")
                  .setSourceServiceInstance("e2e-test-source-service-instance")
                  .setDestServiceName("e2e-test-dest-service")
                  .setDestServiceInstance("e2e-test-dest-service-instance")
                  .setEndpoint("e2e/test")
                  .setLatency(2000)
                  .setResponseCode(200)
                  .setStatus(SUCCESS)
                  .setProtocol(Protocol.HTTP)
                  .setDetectPoint(DetectPoint.server);
  
          final LocalDateTime now = LocalDateTime.now(ZoneOffset.UTC);
          final LocalDateTime startTime = now.minusDays(metricsTTL + 1);
          final LocalDateTime endTime = startTime.plusMinutes(1);
  
          sendMetrics(ServiceMeshMetrics
              .newBuilder()
              .setHttpMetrics(
                  HTTPServiceMeshMetrics
                      .newBuilder()
                      .addMetrics(
                          builder
                              .setStartTime(startTime.toEpochSecond(ZoneOffset.UTC) * 1000)
                              .setEndTime(endTime.toEpochSecond(ZoneOffset.UTC) * 1000)))
              .build());
  
          return "Metrics send success!";
      }
  
      void sendMetrics(final ServiceMeshMetrics metrics) throws InterruptedException {
          final CountDownLatch latch = new CountDownLatch(1);
  
          StreamObserver<ServiceMeshMetrics> collect = grpcStub.collect(new StreamObserver<MeshProbeDownstream>() {
              @Override
              public void onNext(final MeshProbeDownstream meshProbeDownstream) {
  
              }
  
              @Override
              public void onError(final Throwable throwable) {
                  throwable.printStackTrace();
                  latch.countDown();
              }
  
              @Override
              public void onCompleted() {
                  latch.countDown();
              }
          });
  
          collect.onNext(metrics);
  
          collect.onCompleted();
  
          latch.await();
      }
  }
  