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.plugin.subbroker;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.concurrent.atomic.AtomicBoolean;
  import lombok.extern.slf4j.Slf4j;
  import org.pf4j.PluginManager;
  
  @Slf4j
  public class SubBrokerManager implements ISubBrokerManager {
      private final AtomicBoolean stopped = new AtomicBoolean();
      private final Map<Integer, ISubBroker> receivers = new HashMap<>();
  
      public SubBrokerManager(PluginManager pluginMgr, ISubBroker... builtInReceivers) {
          for (ISubBroker receiver : builtInReceivers) {
              log.info("Register built-in receiver[{}] with id[{}]", receiver.getClass().getSimpleName(), receiver.id());
              receivers.put(receiver.id(), new MonitoredSubBroker(receiver));
          }
          List<ISubBroker> customReceivers = pluginMgr.getExtensions(ISubBroker.class);
          for (ISubBroker customReceiver : customReceivers) {
              if (receivers.containsKey(customReceiver.id())) {
                  log.warn("Id[{}] is reserved for receiver[{}], skip registering custom receiver[{}]",
                      customReceiver.id(),
                      receivers.get(customReceiver.id()).getClass().getName(),
                      customReceiver.getClass().getName());
              } else {
                  log.info("Register custom receiver[{}] with id[{}]",
                      customReceiver.getClass().getSimpleName(), customReceiver.id());
                  receivers.put(customReceiver.id(), new MonitoredSubBroker(customReceiver));
              }
          }
      }
  
      @Override
      public ISubBroker get(int subBrokerId) {
          return receivers.getOrDefault(subBrokerId, NoInboxSubBroker.INSTANCE);
      }
  
      @Override
      public void close() {
          if (stopped.compareAndSet(false, true)) {
              log.debug("Stopping SubBrokerManager");
              receivers.values().forEach(ISubBroker::close);
              log.debug("SubBrokerManager stopped");
          }
      }
  }
  