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.core.config.group.openapi;
  
  import java.io.FileNotFoundException;
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.skywalking.oap.server.configuration.api.GroupConfigChangeWatcher;
  import org.apache.skywalking.oap.server.core.CoreModule;
  import org.apache.skywalking.oap.server.core.config.group.EndpointNameGrouping;
  import org.apache.skywalking.oap.server.library.module.ModuleProvider;
  
  @Slf4j
  public class EndpointNameGroupingRule4OpenapiWatcher extends GroupConfigChangeWatcher {
      private final EndpointNameGrouping grouping;
      private final Map<String, String> openapiDefs;
  
      public EndpointNameGroupingRule4OpenapiWatcher(ModuleProvider provider,
                                                     EndpointNameGrouping grouping) throws FileNotFoundException {
          super(CoreModule.NAME, provider, "endpoint-name-grouping-openapi");
          this.grouping = grouping;
          this.openapiDefs = new ConcurrentHashMap<>();
          this.grouping.setEndpointGroupingRule4Openapi(
              new EndpointGroupingRuleReader4Openapi("openapi-definitions").read());
      }
  
      @Override
      public Map<String, String> groupItems() {
          return openapiDefs;
      }
  
      @Override
      public void notifyGroup(final Map<String, ConfigChangeEvent> groupItems) {
          groupItems.forEach((groupItemName, event) -> {
              if (EventType.DELETE.equals(event.getEventType())) {
                  this.openapiDefs.remove(groupItemName);
                  log.info("EndpointNameGroupingRule4OpenapiWatcher removed groupItem: {}", groupItemName);
              } else {
                  this.openapiDefs.put(groupItemName, event.getNewValue());
                  log.info("EndpointNameGroupingRule4OpenapiWatcher modified groupItem: {}", groupItemName);
              }
          });
          this.grouping.setEndpointGroupingRule4Openapi(new EndpointGroupingRuleReader4Openapi(openapiDefs).read());
      }
  }
  