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.sessiondict.client;
  
  import java.util.concurrent.atomic.AtomicReference;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.bifromq.type.ClientInfo;
  
  @Slf4j
  class SessionRegistration implements ISessionRegistration {
      private final AtomicReference<State> state;
      private final ClientInfo owner;
      private final SessionRegister register;
      SessionRegistration(ClientInfo owner, ISessionDictClient.IKillListener killListener, SessionRegister register) {
          this.owner = owner;
          this.register = register;
          this.state = new AtomicReference<>(State.Registered);
          this.register.reg(owner, quit -> {
              if (log.isTraceEnabled()) {
                  log.trace("Received quit request:reqId={},killer={}", quit.getReqId(), quit.getKiller());
              }
              killListener.onKill(quit.getKiller(), quit.getServerRedirection());
              state.set(State.Kicked);
              stop();
          });
          this.register.sendRegInfo(owner, true);
      }
  
      @Override
      public void stop() {
          if (state.get() == State.Quit) {
              return;
          }
          if (state.get() == State.Registered) {
              this.register.sendRegInfo(owner, false);
          }
          register.unreg(owner);
          state.set(State.Quit);
      }
  
      private enum State {
          Registered, Kicked, Quit
      }
  }
  