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Java JDBC 4.2 (JRE 8+) driver for YugaByte SQL database

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/*
 * Copyright (c) 2004, PostgreSQL Global Development Group
 * See the LICENSE file in the project root for more information.
 */

package org.postgresql.jdbc;

import java.util.concurrent.locks.ReentrantLock;

/**
 * Extends a ReentrantLock for use in try-with-resources block.
 *
 * Example use
 * {@code
 *
 *   try (ResourceLock ignore = lock.obtain()) {
 *     // do something while holding the resource lock
 *   }
 *
 * }
 */
public final class ResourceLock extends ReentrantLock implements AutoCloseable {

  /**
   * Obtain a lock and return the ResourceLock for use in try-with-resources block.
   */
  public ResourceLock obtain() {
    lock();
    return this;
  }

  /**
   * Unlock on exit of try-with-resources block.
   */
  @Override
  public void close() {
    this.unlock();
  }
}