content: /*
   * Copyright 1999-2023 Alibaba Group Holding Ltd.
   *
   * 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 com.alibaba.nacos.lock;
  
  import com.alibaba.nacos.common.spi.NacosServiceLoader;
  import com.alibaba.nacos.lock.core.reentrant.AtomicLockService;
  import com.alibaba.nacos.lock.exception.NacosLockException;
  import com.alibaba.nacos.lock.factory.LockFactory;
  import com.alibaba.nacos.lock.model.LockKey;
  import org.springframework.stereotype.Service;
  
  import java.util.Collection;
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.stream.Collectors;
  
  /**
   * nacos lock manager.
   *
   * @author 985492783@qq.com
   * @date 2023/8/22 21:01
   */
  @Service
  public class NacosLockManager implements LockManager {
      
      private final Map<String, LockFactory> factoryMap;
      
      private final ConcurrentHashMap<LockKey, AtomicLockService> atomicLockMap = new ConcurrentHashMap<>();
      
      public NacosLockManager() {
          Collection<LockFactory> factories = NacosServiceLoader.load(LockFactory.class);
          factoryMap = factories.stream()
                  .collect(Collectors.toConcurrentMap(LockFactory::getLockType, lockFactory -> lockFactory));
      }
      
      @Override
      public AtomicLockService getMutexLock(LockKey lockKey) {
          if (lockKey == null || lockKey.getLockType() == null || lockKey.getKey() == null) {
              throw new NacosLockException("lockType or lockKey is null.");
          }
          if (!factoryMap.containsKey(lockKey.getLockType())) {
              throw new NacosLockException("lockType: " + lockKey.getLockType() + " is not exist.");
          }
          return atomicLockMap.computeIfAbsent(lockKey, lock -> {
              LockFactory lockFactory = factoryMap.get(lock.getLockType());
              return lockFactory.createLock(lock.getKey());
          });
      }
      
      @Override
      public ConcurrentHashMap<LockKey, AtomicLockService> showLocks() {
          return atomicLockMap;
      }
      
      @Override
      public AtomicLockService removeMutexLock(LockKey lockKey) {
          if (lockKey == null || lockKey.getLockType() == null || lockKey.getKey() == null) {
              throw new NacosLockException("lockType or lockKey is null.");
          }
          if (!factoryMap.containsKey(lockKey.getLockType())) {
              throw new NacosLockException("lockType: " + lockKey.getLockType() + " is not exist.");
          }
          return atomicLockMap.remove(lockKey);
      }
      
  }
  