content: /*
   * Copyright 2020 The Apache Software Foundation.
   *
   * 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 org.apache.bookkeeper.client.api;
  
  /**
   * Utility container for listing ledgers.
   */
  public interface ListLedgersResult extends AutoCloseable {
  
      /**
       * Creates a <code>LedgersIterator</code>.
       * This method must be called once per <code>ListLedgersResult</code> instance.
       * @return a <code>LedgersIterator</code> instance.
       */
      LedgersIterator iterator();
  
      /**
       * Creates a <code>Iterable</code>, which wraps a <code>LedgersIterator</code>.
       * This method must be called once per <code>ListLedgersResult</code> instance.
       * <br>
       * Metadata store access exceptions (<code>IOException</code>) are wrapped within a RuntimeException.
       * if you want to take care of these cases, it is better to use <code>LedgersIterator</code>.
       * @return a <code>Iterable</code> instance, containing ledger ids.
       */
      Iterable<Long> toIterable();
  
  }
  