content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.meta;
  
  import java.io.Closeable;
  import org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.GenericCallback;
  
  /**
   * The interface for global unique ledger ID generation.
   */
  public interface LedgerIdGenerator extends Closeable {
  
      /**
       * Generate a global unique ledger id.
       *
       * @param cb
       *            Callback when a new ledger id is generated, return code:<ul>
       *            <li>{@link BKException.Code.OK} if success</li>
       *            <li>{@link BKException.Code.ZKException} when can't generate new ledger id</li>
       *            </ul>
       */
      void generateLedgerId(GenericCallback<Long> cb);
  
  }
  