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.analyzer.provider.trace.parser.listener;
  
  import java.util.Arrays;
  import java.util.List;
  import lombok.RequiredArgsConstructor;
  import org.apache.skywalking.apm.network.language.agent.v3.SegmentObject;
  import org.apache.skywalking.apm.network.language.agent.v3.SpanObject;
  import org.apache.skywalking.oap.server.analyzer.provider.AnalyzerModuleConfig;
  import org.apache.skywalking.oap.server.analyzer.provider.trace.parser.listener.vservice.VirtualCacheProcessor;
  import org.apache.skywalking.oap.server.analyzer.provider.trace.parser.listener.vservice.VirtualDatabaseProcessor;
  import org.apache.skywalking.oap.server.analyzer.provider.trace.parser.listener.vservice.VirtualMQProcessor;
  import org.apache.skywalking.oap.server.analyzer.provider.trace.parser.listener.vservice.VirtualServiceProcessor;
  import org.apache.skywalking.oap.server.core.CoreModule;
  import org.apache.skywalking.oap.server.core.config.NamingControl;
  import org.apache.skywalking.oap.server.core.source.SourceReceiver;
  import org.apache.skywalking.oap.server.library.module.ModuleManager;
  
  /**
   * Virtual Service represent remote service
   */
  
  @RequiredArgsConstructor
  public class VirtualServiceAnalysisListener implements ExitAnalysisListener, LocalAnalysisListener, EntryAnalysisListener {
  
      private final SourceReceiver sourceReceiver;
      private final List<VirtualServiceProcessor> virtualServiceProcessors;
  
      @Override
      public void build() {
          virtualServiceProcessors.forEach(p -> p.emitTo(sourceReceiver::receive));
      }
  
      @Override
      public boolean containsPoint(Point point) {
          return point == Point.Local || point == Point.Exit || point == Point.Entry;
      }
  
      @Override
      public void parseExit(SpanObject span, SegmentObject segmentObject) {
          virtualServiceProcessors.forEach(p -> p.prepareVSIfNecessary(span, segmentObject));
      }
  
      @Override
      public void parseLocal(SpanObject span, SegmentObject segmentObject) {
          virtualServiceProcessors.forEach(p -> p.prepareVSIfNecessary(span, segmentObject));
      }
  
      @Override
      public void parseEntry(final SpanObject span, final SegmentObject segmentObject) {
          virtualServiceProcessors.forEach(p -> p.prepareVSIfNecessary(span, segmentObject));
      }
  
      public static class Factory implements AnalysisListenerFactory {
          private final SourceReceiver sourceReceiver;
          private final NamingControl namingControl;
  
          public Factory(ModuleManager moduleManager) {
              this.sourceReceiver = moduleManager.find(CoreModule.NAME).provider().getService(SourceReceiver.class);
              this.namingControl = moduleManager.find(CoreModule.NAME)
                      .provider()
                      .getService(NamingControl.class);
          }
  
          @Override
          public AnalysisListener create(ModuleManager moduleManager, AnalyzerModuleConfig config) {
              return new VirtualServiceAnalysisListener(
                  sourceReceiver,
                  Arrays.asList(
                      new VirtualCacheProcessor(namingControl, config),
                      new VirtualDatabaseProcessor(namingControl, config),
                      new VirtualMQProcessor(namingControl)
                  )
              );
          }
      }
  
  }
  
  