clog_reader_cmd.cpp

/* Copyright (c) 2021-2022 OceanBase and/or its affiliates. All rights reserved.
miniob is licensed under Mulan PSL v2.
You can use this software according to the terms and conditions of the Mulan PSL v2.
You may obtain a copy of Mulan PSL v2 at:
         http://license.coscl.org.cn/MulanPSL2
THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
See the Mulan PSL v2 for more details. */

//
// Created by wangyunlai.wyl on 2023/06/07
//

#include <inttypes.h>

#include "storage/clog/clog.h"

using namespace std;

void dump(const char *filename)
{
  CLogFile file;
  RC rc = file.init(filename);
  if (OB_FAIL(rc)) {
    printf("failed to open file: '%s'. syserr=%s, rc=%s\n", filename, strerror(errno), strrc(rc));
    return;
  }

  CLogRecordIterator iterator;
  rc = iterator.init(file);
  if (OB_FAIL(rc)) {
    printf("failed to init iterator. rc=%s\n", strrc(rc));
    return;
  }
  
  int64_t offset = 0;
  int index = 0;
  for (index++, rc = iterator.next(); OB_SUCC(rc) && iterator.valid(); rc = iterator.next(), ++index) {
    const CLogRecord &log_record = iterator.log_record();
    
    printf("index:%d, file_offset:%" PRId64 ", %s\n", index, offset, log_record.to_string().c_str());
    (void)file.offset(offset);
  }

  if (rc != RC::RECORD_EOF) {
    printf("something error. error=%s\n", strrc(rc));
  }
}

int main(int argc, char *argv[])
{
  if (argc < 2) {
    printf("please give me a clog file name\n");
    return 1;
  }

  dump(argv[1]);
  return 0;
}