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.event;
  
  import java.util.ArrayList;
  import java.util.List;
  import lombok.RequiredArgsConstructor;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.skywalking.apm.network.event.v3.Event;
  import org.apache.skywalking.oap.server.analyzer.event.listener.EventAnalyzerListener;
  import org.apache.skywalking.oap.server.analyzer.event.listener.IEventAnalyzerListenerManager;
  import org.apache.skywalking.oap.server.library.module.ModuleManager;
  
  /**
   * Analyze the collected event data, is the entry point for event analysis.
   */
  @Slf4j
  @RequiredArgsConstructor
  public class EventAnalyzer {
      private final ModuleManager moduleManager;
  
      private final IEventAnalyzerListenerManager factoryManager;
  
      private final List<EventAnalyzerListener> listeners = new ArrayList<>();
  
      public void analyze(final Event builder) {
          createListeners();
          notifyListener(builder);
          notifyListenerToBuild();
      }
  
      private void notifyListener(final Event event) {
          listeners.forEach(listener -> listener.parse(event));
      }
  
      private void notifyListenerToBuild() {
          listeners.forEach(EventAnalyzerListener::build);
      }
  
      private void createListeners() {
          factoryManager.getEventAnalyzerListenerFactories()
                        .forEach(factory -> listeners.add(factory.create(moduleManager)));
      }
  }
  