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.client;
  
  import java.util.Optional;
  import org.apache.bifromq.baserpc.client.loadbalancer.IServerGroupRouter;
  import org.apache.bifromq.baserpc.client.loadbalancer.IServerSelector;
  
  class DummyServerSelector implements IServerSelector {
      public static final IServerSelector INSTANCE = new DummyServerSelector();
  
      @Override
      public boolean exists(String serverId) {
          return false;
      }
  
      @Override
      public IServerGroupRouter get(String tenantId) {
          return new IServerGroupRouter() {
              @Override
              public boolean isSameGroup(IServerGroupRouter other) {
                  return false;
              }
  
              @Override
              public Optional<String> random() {
                  return Optional.empty();
              }
  
              @Override
              public Optional<String> roundRobin() {
                  return Optional.empty();
              }
  
              @Override
              public Optional<String> tryRoundRobin() {
                  return Optional.empty();
              }
  
              @Override
              public Optional<String> hashing(String key) {
                  return Optional.empty();
              }
  
              @Override
              public Optional<String> stickyHashing(String key) {
                  return Optional.empty();
              }
          };
      }
  
      @Override
      public String toString() {
          return "DummyServerSelector";
      }
  }
  