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package org.rocksdb;

public abstract class ConcurrentTaskLimiter extends RocksObject {
  protected ConcurrentTaskLimiter(final long nativeHandle) {
    super(nativeHandle);
  }

  /**
   * Returns a name that identifies this concurrent task limiter.
   *
   * @return Concurrent task limiter name.
   */
  public abstract String name();

  /**
   * Set max concurrent tasks.

   * limit = 0 means no new task allowed.

   * limit < 0 means no limitation.
   *
   * @param maxOutstandinsTask max concurrent tasks.
   * @return the reference to the current instance of ConcurrentTaskLimiter.
   */
  public abstract ConcurrentTaskLimiter setMaxOutstandingTask(final int maxOutstandinsTask);

  /**
   * Reset to unlimited max concurrent task.
   *
   * @return the reference to the current instance of ConcurrentTaskLimiter.
   */
  public abstract ConcurrentTaskLimiter resetMaxOutstandingTask();

  /**
   * Returns current outstanding task count.
   *
   * @return current outstanding task count.
   */
  public abstract int outstandingTask();
}