rocksdb/table/plain_table_factory.cc

// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.

#ifndef ROCKSDB_LITE
#include "table/plain_table_factory.h"

#include <memory>
#include <stdint.h>
#include "db/dbformat.h"
#include "table/plain_table_builder.h"
#include "table/plain_table_reader.h"
#include "port/port.h"

namespace rocksdb {

Status PlainTableFactory::NewTableReader(const ImmutableCFOptions& ioptions,
                                         const EnvOptions& env_options,
                                         const InternalKeyComparator& icomp,
                                         unique_ptr<RandomAccessFile>&& file,
                                         uint64_t file_size,
                                         unique_ptr<TableReader>* table) const {
  return PlainTableReader::Open(ioptions, env_options, icomp, std::move(file),
                                file_size, table, bloom_bits_per_key_,
                                hash_table_ratio_, index_sparseness_,
                                huge_page_tlb_size_, full_scan_mode_);
}

TableBuilder* PlainTableFactory::NewTableBuilder(
    const ImmutableCFOptions& ioptions,
    const InternalKeyComparator& internal_comparator, WritableFile* file,
    const CompressionType, const CompressionOptions&,
    const bool skip_filters) const {

  // Ignore the skip_filters flag. PlainTable format is optimized for small
  // in-memory dbs. The skip_filters optimization is not useful for plain
  // tables
  //
  return new PlainTableBuilder(ioptions, file, user_key_len_, encoding_type_,
                               index_sparseness_, bloom_bits_per_key_, 6,
                               huge_page_tlb_size_, hash_table_ratio_,
                               store_index_in_file_);
}

std::string PlainTableFactory::GetPrintableTableOptions() const {
  std::string ret;
  ret.reserve(20000);
  const int kBufferSize = 200;
  char buffer[kBufferSize];

  snprintf(buffer, kBufferSize, "  user_key_len: %u\n",
           user_key_len_);
  ret.append(buffer);
  snprintf(buffer, kBufferSize, "  bloom_bits_per_key: %d\n",
           bloom_bits_per_key_);
  ret.append(buffer);
  snprintf(buffer, kBufferSize, "  hash_table_ratio: %lf\n",
           hash_table_ratio_);
  ret.append(buffer);
  snprintf(buffer, kBufferSize, "  index_sparseness: %zu\n",
           index_sparseness_);
  ret.append(buffer);
  snprintf(buffer, kBufferSize, "  huge_page_tlb_size: %zu\n",
           huge_page_tlb_size_);
  ret.append(buffer);
  snprintf(buffer, kBufferSize, "  encoding_type: %d\n",
           encoding_type_);
  ret.append(buffer);
  snprintf(buffer, kBufferSize, "  full_scan_mode: %d\n",
           full_scan_mode_);
  ret.append(buffer);
  snprintf(buffer, kBufferSize, "  store_index_in_file: %d\n",
           store_index_in_file_);
  ret.append(buffer);
  return ret;
}

extern TableFactory* NewPlainTableFactory(const PlainTableOptions& options) {
  return new PlainTableFactory(options);
}

const std::string PlainTablePropertyNames::kPrefixExtractorName =
    "rocksdb.prefix.extractor.name";

const std::string PlainTablePropertyNames::kEncodingType =
    "rocksdb.plain.table.encoding.type";

const std::string PlainTablePropertyNames::kBloomVersion =
    "rocksdb.plain.table.bloom.version";

const std::string PlainTablePropertyNames::kNumBloomBlocks =
    "rocksdb.plain.table.bloom.numblocks";

}  // namespace rocksdb
#endif  // ROCKSDB_LITE