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.baserpc.trafficgovernor;
  
  import org.apache.bifromq.basecrdt.service.ICRDTService;
  import io.reactivex.rxjava3.core.Observable;
  import io.reactivex.rxjava3.schedulers.Schedulers;
  import java.util.Map;
  import java.util.Set;
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.stream.Collectors;
  
  class RPCServiceTrafficService implements IRPCServiceTrafficService {
      private final ICRDTService crdtService;
      private Map<String, RPCServiceTrafficManager> trafficManagerMap = new ConcurrentHashMap<>();
  
      public RPCServiceTrafficService(ICRDTService crdtService) {
          this.crdtService = crdtService;
      }
  
      @Override
      public Observable<Set<String>> services() {
          return crdtService.aliveCRDTs()
              .map(crdtUris -> crdtUris.stream()
                  .filter(NameUtil::isLandscapeURI)
                  .map(NameUtil::parseServiceUniqueName)
                  .collect(Collectors.toSet()))
              .distinctUntilChanged()
              .observeOn(Schedulers.single());
      }
  
      @Override
      public IRPCServiceLandscape getServiceLandscape(String serviceUniqueName) {
          return getTrafficManager(serviceUniqueName);
      }
  
      @Override
      public IRPCServiceServerRegister getServerRegister(String serviceUniqueName) {
          return getTrafficManager(serviceUniqueName);
      }
  
      @Override
      public IRPCServiceTrafficGovernor getTrafficGovernor(String serviceUniqueName) {
          return getTrafficManager(serviceUniqueName);
      }
  
      private RPCServiceTrafficManager getTrafficManager(String serviceUniqueName) {
          return trafficManagerMap.computeIfAbsent(serviceUniqueName,
              k -> new RPCServiceTrafficManager(serviceUniqueName, crdtService));
      }
  
      @Override
      public void close() {
          trafficManagerMap.values().forEach(RPCServiceTrafficManager::close);
      }
  }
  