rocksdb/utilities/options/options_util.cc
2016-02-09 15:12:00 -08:00

100 lines
3.1 KiB
C++

// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#ifndef ROCKSDB_LITE
#include "rocksdb/utilities/options_util.h"
#include "db/filename.h"
#include "rocksdb/options.h"
#include "util/options_parser.h"
namespace rocksdb {
Status LoadOptionsFromFile(const std::string& file_name, Env* env,
DBOptions* db_options,
std::vector<ColumnFamilyDescriptor>* cf_descs) {
RocksDBOptionsParser parser;
Status s = parser.Parse(file_name, env);
if (!s.ok()) {
return s;
}
*db_options = *parser.db_opt();
const std::vector<std::string>& cf_names = *parser.cf_names();
const std::vector<ColumnFamilyOptions>& cf_opts = *parser.cf_opts();
cf_descs->clear();
for (size_t i = 0; i < cf_opts.size(); ++i) {
cf_descs->push_back({cf_names[i], cf_opts[i]});
}
return Status::OK();
}
Status GetLatestOptionsFileName(const std::string& dbpath,
Env* env, std::string* options_file_name) {
Status s;
std::string latest_file_name;
uint64_t latest_time_stamp = 0;
std::vector<std::string> file_names;
s = env->GetChildren(dbpath, &file_names);
if (!s.ok()) {
return s;
}
for (auto& file_name : file_names) {
uint64_t time_stamp;
FileType type;
if (ParseFileName(file_name, &time_stamp, &type) && type == kOptionsFile) {
if (time_stamp > latest_time_stamp) {
latest_time_stamp = time_stamp;
latest_file_name = file_name;
}
}
}
if (latest_file_name.size() == 0) {
return Status::NotFound("No options files found in the DB directory.");
}
*options_file_name = latest_file_name;
return Status::OK();
}
Status LoadLatestOptions(const std::string& dbpath, Env* env,
DBOptions* db_options,
std::vector<ColumnFamilyDescriptor>* cf_descs) {
std::string options_file_name;
Status s = GetLatestOptionsFileName(dbpath, env, &options_file_name);
if (!s.ok()) {
return s;
}
return LoadOptionsFromFile(dbpath + "/" + options_file_name, env,
db_options, cf_descs);
}
Status CheckOptionsCompatibility(
const std::string& dbpath, Env* env, const DBOptions& db_options,
const std::vector<ColumnFamilyDescriptor>& cf_descs) {
std::string options_file_name;
Status s = GetLatestOptionsFileName(dbpath, env, &options_file_name);
if (!s.ok()) {
return s;
}
std::vector<std::string> cf_names;
std::vector<ColumnFamilyOptions> cf_opts;
for (const auto& cf_desc : cf_descs) {
cf_names.push_back(cf_desc.name);
cf_opts.push_back(cf_desc.options);
}
const OptionsSanityCheckLevel kDefaultLevel = kSanityLevelLooselyCompatible;
return RocksDBOptionsParser::VerifyRocksDBOptionsFromFile(
db_options, cf_names, cf_opts, dbpath + "/" + options_file_name, env,
kDefaultLevel);
}
} // namespace rocksdb
#endif // !ROCKSDB_LITE