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c442f6809f
Summary: The Customizable class is an extension of the Configurable class and allows instances to be created by a name/ID. Classes that extend customizable can define their Type (e.g. "TableFactory", "Cache") and a method to instantiate them (TableFactory::CreateFromString). Customizable objects can be registered with the ObjectRegistry and created dynamically. Future PRs will make more types of objects extend Customizable. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6590 Reviewed By: cheng-chang Differential Revision: D24841553 Pulled By: zhichao-cao fbshipit-source-id: d0c2132bd932e971cbfe2c908ca2e5db30c5e155
78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#include "rocksdb/customizable.h"
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#include "options/configurable_helper.h"
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#include "rocksdb/convenience.h"
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#include "rocksdb/status.h"
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#include "util/string_util.h"
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namespace ROCKSDB_NAMESPACE {
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std::string Customizable::GetOptionName(const std::string& long_name) const {
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const std::string& name = Name();
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size_t name_len = name.size();
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if (long_name.size() > name_len + 1 &&
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long_name.compare(0, name_len, name) == 0 &&
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long_name.at(name_len) == '.') {
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return long_name.substr(name_len + 1);
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} else {
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return Configurable::GetOptionName(long_name);
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}
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}
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#ifndef ROCKSDB_LITE
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Status Customizable::GetOption(const ConfigOptions& config_options,
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const std::string& opt_name,
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std::string* value) const {
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if (opt_name == ConfigurableHelper::kIdPropName) {
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*value = GetId();
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return Status::OK();
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} else {
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return Configurable::GetOption(config_options, opt_name, value);
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}
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}
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std::string Customizable::SerializeOptions(const ConfigOptions& config_options,
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const std::string& prefix) const {
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std::string result;
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std::string parent;
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if (!config_options.IsShallow()) {
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parent = Configurable::SerializeOptions(config_options, "");
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}
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if (parent.empty()) {
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result = GetId();
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} else {
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result.append(prefix + ConfigurableHelper::kIdPropName + "=" + GetId() +
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config_options.delimiter);
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result.append(parent);
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}
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return result;
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}
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#endif // ROCKSDB_LITE
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bool Customizable::AreEquivalent(const ConfigOptions& config_options,
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const Configurable* other,
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std::string* mismatch) const {
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if (config_options.sanity_level > ConfigOptions::kSanityLevelNone &&
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this != other) {
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const Customizable* custom = reinterpret_cast<const Customizable*>(other);
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if (GetId() != custom->GetId()) {
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*mismatch = ConfigurableHelper::kIdPropName;
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return false;
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} else if (config_options.sanity_level >
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ConfigOptions::kSanityLevelLooselyCompatible) {
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bool matches =
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Configurable::AreEquivalent(config_options, other, mismatch);
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return matches;
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}
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}
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return true;
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}
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} // namespace ROCKSDB_NAMESPACE
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