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.asterix.common.transactions;
  
  public interface ILogReader {
  
      /**
       * Sets the log reader position at log sequence number with value {@code lsn}.
       *
       * @param lsn
       */
      void setPosition(long lsn);
  
      /**
       * Reads and returns the log record located at the log reader current position. After reading the log record,
       * the log reader position is incremented by the size of the read log.
       *
       * @return the log record
       */
      ILogRecord next();
  
      /**
       * Reads and returns the log record with log sequence number {@code lsn}.
       *
       * @param lsn
       * @return The log record
       */
      ILogRecord read(long lsn);
  
      /**
       * Closes the log reader and any resources used.
       */
      void close();
  
  }
  