You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 
rocksdb/table/adaptive_table_factory.cc

73 lines
2.9 KiB

// 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/adaptive_table_factory.h"
#include "table/format.h"
namespace rocksdb {
AdaptiveTableFactory::AdaptiveTableFactory(
std::shared_ptr<TableFactory> block_based_table_factory,
std::shared_ptr<TableFactory> plain_table_factory,
std::shared_ptr<TableFactory> table_factory_to_write)
: block_based_table_factory_(block_based_table_factory),
plain_table_factory_(plain_table_factory),
table_factory_to_write_(table_factory_to_write) {
if (!plain_table_factory_) {
plain_table_factory_.reset(NewPlainTableFactory());
}
if (!block_based_table_factory_) {
block_based_table_factory_.reset(NewBlockBasedTableFactory());
}
if (!table_factory_to_write_) {
table_factory_to_write_ = block_based_table_factory_;
}
}
extern const uint64_t kPlainTableMagicNumber;
extern const uint64_t kLegacyPlainTableMagicNumber;
extern const uint64_t kBlockBasedTableMagicNumber;
extern const uint64_t kLegacyBlockBasedTableMagicNumber;
Status AdaptiveTableFactory::NewTableReader(
const Options& options, const EnvOptions& soptions,
const InternalKeyComparator& icomp, unique_ptr<RandomAccessFile>&& file,
uint64_t file_size, unique_ptr<TableReader>* table) const {
Footer footer;
auto s = ReadFooterFromFile(file.get(), file_size, &footer);
if (!s.ok()) {
return s;
}
if (footer.table_magic_number() == kPlainTableMagicNumber ||
footer.table_magic_number() == kLegacyPlainTableMagicNumber) {
return plain_table_factory_->NewTableReader(
options, soptions, icomp, std::move(file), file_size, table);
} else if (footer.table_magic_number() == kBlockBasedTableMagicNumber ||
footer.table_magic_number() == kLegacyBlockBasedTableMagicNumber) {
return block_based_table_factory_->NewTableReader(
options, soptions, icomp, std::move(file), file_size, table);
} else {
return Status::NotSupported("Unidentified table format");
}
}
TableBuilder* AdaptiveTableFactory::NewTableBuilder(
const Options& options, const InternalKeyComparator& internal_comparator,
WritableFile* file, CompressionType compression_type) const {
return table_factory_to_write_->NewTableBuilder(options, internal_comparator,
file, compression_type);
}
extern TableFactory* NewAdaptiveTableFactory(
std::shared_ptr<TableFactory> block_based_table_factory,
std::shared_ptr<TableFactory> plain_table_factory,
std::shared_ptr<TableFactory> table_factory_to_write) {
return new AdaptiveTableFactory(
block_based_table_factory, plain_table_factory, table_factory_to_write);
}
} // namespace rocksdb
#endif // ROCKSDB_LITE