content: /**
   * Copyright 2020 Alibaba Group Holding Limited.
   *
   * 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 com.alibaba.graphscope.groot.wal;
  
  import org.apache.kafka.clients.consumer.ConsumerRecord;
  import org.apache.kafka.clients.consumer.ConsumerRecords;
  
  import java.io.IOException;
  
  /**
   * A LogReader can read data of a queue from certain offset.
   */
  public interface LogReader extends AutoCloseable {
  
      /**
       * Read the next LogEntry of the queue
       * @return
       */
      ReadLogEntry readNext();
  
      public ConsumerRecord<LogEntry, LogEntry> readNextRecord();
  
      ConsumerRecords<LogEntry, LogEntry> getLatestUpdates();
  
      void close() throws IOException;
  }
  