content: /*
   * 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.bifromq.apiserver.http.handler;
  
  import io.reactivex.rxjava3.disposables.CompositeDisposable;
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  import org.apache.bifromq.apiserver.http.IHTTPRequestHandler;
  import org.apache.bifromq.baserpc.trafficgovernor.IRPCServiceTrafficGovernor;
  import org.apache.bifromq.baserpc.trafficgovernor.IRPCServiceTrafficService;
  
  abstract class AbstractTrafficRulesHandler implements IHTTPRequestHandler {
      protected final Map<String, IRPCServiceTrafficGovernor> governorMap = new ConcurrentHashMap<>();
      private final IRPCServiceTrafficService trafficService;
      private final CompositeDisposable disposable = new CompositeDisposable();
  
      public AbstractTrafficRulesHandler(IRPCServiceTrafficService trafficService) {
          this.trafficService = trafficService;
      }
  
      @Override
      public void start() {
          disposable.add(trafficService.services().subscribe(serviceUniqueNames -> {
              governorMap.keySet().removeIf(serviceUniqueName -> !serviceUniqueNames.contains(serviceUniqueName));
              for (String serviceUniqueName : serviceUniqueNames) {
                  if (isRPCService(serviceUniqueName)) {
                      governorMap.computeIfAbsent(shortServiceName(serviceUniqueName),
                          k -> trafficService.getTrafficGovernor(serviceUniqueName));
                  }
              }
          }));
      }
  
      @Override
      public void close() {
          disposable.dispose();
      }
  
      protected boolean isTrafficGovernable(String serviceName) {
          return !serviceName.equals("BrokerService");
      }
  
      private boolean isRPCService(String serviceUniqueName) {
          return !serviceUniqueName.endsWith("@basekv.BaseKVStoreService");
      }
  
      private String shortServiceName(String serviceUniqueName) {
          return serviceUniqueName.substring(serviceUniqueName.lastIndexOf('.') + 1);
      }
  }
  