content: /*
   * MIT License
   *
   * Copyright (c) 2020 Alen Turkovic
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  package com.github.alturkovic.lock.retry;
  
  import com.github.alturkovic.lock.Lock;
  import com.github.alturkovic.lock.exception.LockNotAvailableException;
  import java.util.List;
  import lombok.Data;
  import org.springframework.retry.support.RetryTemplate;
  import org.springframework.util.StringUtils;
  
  /**
   * A {@link Lock} wrapper for retrying {@link #acquire} method calls. This wrapper will retry the acquire method
   * only as specified by the provided {@link RetryTemplate}.
   */
  @Data
  public class RetriableLock implements Lock {
    private final Lock lock;
    private final RetryTemplate retryTemplate;
  
    @Override
    public String acquire(final List<String> keys, final String storeId, final long expiration) {
      try {
        return retryTemplate.execute(ctx -> {
          final String token = lock.acquire(keys, storeId, expiration);
  
          if (StringUtils.isEmpty(token)) {
            throw new LockNotAvailableException(String.format("Lock not available for keys: %s in store %s", keys, storeId));
          }
  
          return token;
        });
      } catch (LockNotAvailableException e) {
        return null;
      }
    }
  
    @Override
    public boolean release(final List<String> keys, final String storeId, final String token) {
      return lock.release(keys, storeId, token);
    }
  
    @Override
    public boolean refresh(final List<String> keys, final String storeId, final String token, final long expiration) {
      return lock.refresh(keys, storeId, token, expiration);
    }
  }
  