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.envoy;
  
  import org.apache.skywalking.aop.server.receiver.mesh.MeshReceiverModule;
  import org.apache.skywalking.oap.server.core.CoreModule;
  import org.apache.skywalking.oap.server.core.oal.rt.OALEngineLoaderService;
  import org.apache.skywalking.oap.server.core.server.GRPCHandlerRegister;
  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.receiver.envoy.als.mx.FieldsHelper;
  import org.apache.skywalking.oap.server.receiver.sharing.server.SharingServerModule;
  import org.apache.skywalking.oap.server.telemetry.TelemetryModule;
  
  public class EnvoyMetricReceiverProvider extends ModuleProvider {
      private EnvoyMetricReceiverConfig config;
  
      protected String fieldMappingFile = "metadata-service-mapping.yaml";
  
      @Override
      public String name() {
          return "default";
      }
  
      @Override
      public Class<? extends ModuleDefine> module() {
          return EnvoyMetricReceiverModule.class;
      }
  
      @Override
      public ConfigCreator newConfigCreator() {
          return new ConfigCreator<EnvoyMetricReceiverConfig>() {
              @Override
              public Class type() {
                  return EnvoyMetricReceiverConfig.class;
              }
  
              @Override
              public void onInitialized(final EnvoyMetricReceiverConfig initialized) {
                  config = initialized;
              }
          };
      }
  
      @Override
      public void prepare() throws ServiceNotProvidedException, ModuleStartException {
          try {
              FieldsHelper.SINGLETON.init(fieldMappingFile, config.serviceMetaInfoFactory().clazz());
          } catch (final Exception e) {
              throw new ModuleStartException("Failed to load metadata-service-mapping.yaml", e);
          }
      }
  
      @Override
      public void start() throws ServiceNotProvidedException, ModuleStartException {
          if (!config.getAlsTCPAnalysis().isEmpty()) {
              getManager().find(CoreModule.NAME)
                          .provider()
                          .getService(OALEngineLoaderService.class)
                          .load(TCPOALDefine.INSTANCE);
          }
  
          GRPCHandlerRegister service = getManager().find(SharingServerModule.NAME)
                                                    .provider()
                                                    .getService(GRPCHandlerRegister.class);
          if (config.isAcceptMetricsService()) {
              final MetricServiceGRPCHandler handler = new MetricServiceGRPCHandler(getManager(), config);
              service.addHandler(handler);
              service.addHandler(new MetricServiceGRPCHandlerV3(handler));
          }
          final AccessLogServiceGRPCHandler handler = new AccessLogServiceGRPCHandler(getManager(), config);
          service.addHandler(handler);
          service.addHandler(new AccessLogServiceGRPCHandlerV3(handler));
          service.addHandler(new SatelliteAccessLogServiceGRPCHandlerV3(handler));
      }
  
      @Override
      public void notifyAfterCompleted() throws ServiceNotProvidedException, ModuleStartException {
  
      }
  
      @Override
      public String[] requiredModules() {
          return new String[] {
              TelemetryModule.NAME,
              CoreModule.NAME,
              SharingServerModule.NAME,
              MeshReceiverModule.NAME
          };
      }
  }
  