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.IOException;
  
  /**
   * Layout manager for writing/reading/deleting ledger layout.
   */
  public interface LayoutManager {
  
      /**
       * The Ledger layout exists exception.
       */
      class LedgerLayoutExistsException extends IOException {
  
          public LedgerLayoutExistsException(String message) {
              super(message);
          }
  
          public LedgerLayoutExistsException(String message, Throwable cause) {
              super(message, cause);
          }
  
          public LedgerLayoutExistsException(Throwable cause) {
              super(cause);
          }
      }
  
      /**
       * Return the ledger layout.
       *
       * @return the ledger layout
       * @throws IOException when fail to read ledger layout.
       */
      LedgerLayout readLedgerLayout() throws IOException;
  
      /**
       * Store the ledger layout.
       *
       * @param layout ledger layout
       * @throws IOException when fail to store ledger layout.
       */
      void storeLedgerLayout(LedgerLayout layout) throws IOException;
  
      /**
       * Delete ledger layout.
       *
       * @throws IOException
       */
      void deleteLedgerLayout() throws IOException;
  
  }
  