content: /*
   * Copyright [2021-present] [ahoo wang <ahoowang@qq.com> (https://github.com/Ahoo-Wang)].
   * Licensed 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 me.ahoo.cosid.mongo;
  
  import me.ahoo.cosid.machine.AbstractMachineIdDistributor;
  import me.ahoo.cosid.machine.ClockBackwardsSynchronizer;
  import me.ahoo.cosid.machine.InstanceId;
  import me.ahoo.cosid.machine.MachineState;
  import me.ahoo.cosid.machine.MachineStateStorage;
  
  import lombok.extern.slf4j.Slf4j;
  
  import java.time.Duration;
  
  @Slf4j
  public class MongoMachineIdDistributor extends AbstractMachineIdDistributor {
      private final MachineCollection machineCollection;
      
      public MongoMachineIdDistributor(MachineCollection machineCollection,
                                       MachineStateStorage machineStateStorage,
                                       ClockBackwardsSynchronizer clockBackwardsSynchronizer
      ) {
          super(machineStateStorage, clockBackwardsSynchronizer);
          this.machineCollection = machineCollection;
      }
      
      @Override
      protected MachineState distributeRemote(String namespace, int machineBit, InstanceId instanceId, Duration safeGuardDuration) {
          MachineState machineState = machineCollection.distributeBySelf(namespace, instanceId, safeGuardDuration);
          if (machineState != null) {
              return machineState;
          }
          
          machineState = machineCollection.distributeByRevert(namespace, instanceId, safeGuardDuration);
          if (machineState != null) {
              return machineState;
          }
          return machineCollection.distribute(namespace, machineBit, instanceId);
      }
      
      
      @Override
      protected void revertRemote(String namespace, InstanceId instanceId, MachineState machineState) {
          machineCollection.revert(namespace, instanceId, machineState);
      }
      
      @Override
      protected void guardRemote(String namespace, InstanceId instanceId, MachineState machineState, Duration safeGuardDuration) {
          machineCollection.guard(namespace, instanceId, machineState, safeGuardDuration);
      }
  }
  