mirror of https://github.com/facebook/rocksdb.git
45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
//
|
|
|
|
#include "rocksdb/sst_partitioner.h"
|
|
|
|
#include <algorithm>
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
PartitionerResult SstPartitionerFixedPrefix::ShouldPartition(
|
|
const PartitionerRequest& request) {
|
|
Slice last_key_fixed(*request.prev_user_key);
|
|
if (last_key_fixed.size() > len_) {
|
|
last_key_fixed.size_ = len_;
|
|
}
|
|
Slice current_key_fixed(*request.current_user_key);
|
|
if (current_key_fixed.size() > len_) {
|
|
current_key_fixed.size_ = len_;
|
|
}
|
|
return last_key_fixed.compare(current_key_fixed) != 0 ? kRequired
|
|
: kNotRequired;
|
|
}
|
|
|
|
bool SstPartitionerFixedPrefix::CanDoTrivialMove(
|
|
const Slice& smallest_user_key, const Slice& largest_user_key) {
|
|
return ShouldPartition(PartitionerRequest(smallest_user_key, largest_user_key,
|
|
0)) == kNotRequired;
|
|
}
|
|
|
|
std::unique_ptr<SstPartitioner>
|
|
SstPartitionerFixedPrefixFactory::CreatePartitioner(
|
|
const SstPartitioner::Context& /* context */) const {
|
|
return std::unique_ptr<SstPartitioner>(new SstPartitionerFixedPrefix(len_));
|
|
}
|
|
|
|
std::shared_ptr<SstPartitionerFactory> NewSstPartitionerFixedPrefixFactory(
|
|
size_t prefix_len) {
|
|
return std::make_shared<SstPartitionerFixedPrefixFactory>(prefix_len);
|
|
}
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|