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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/transport/message_compressor_registry.h"
#include <boost/algorithm/string/classification.hpp>
#include <boost/algorithm/string/split.hpp>
#include <memory>
#include "mongo/base/init.h"
#include "mongo/transport/message_compressor_noop.h"
#include "mongo/transport/message_compressor_snappy.h"
#include "mongo/transport/message_compressor_zlib.h"
#include "mongo/transport/message_compressor_zstd.h"
#include "mongo/util/options_parser/option_section.h"
namespace mongo {
namespace {
constexpr auto kDisabledConfigValue = "disabled"_sd;
} // namespace
StringData getMessageCompressorName(MessageCompressor id) {
switch (id) {
case MessageCompressor::kNoop:
return "noop"_sd;
case MessageCompressor::kSnappy:
return "snappy"_sd;
case MessageCompressor::kZlib:
return "zlib"_sd;
case MessageCompressor::kZstd:
return "zstd"_sd;
default:
fassert(40269, "Invalid message compressor ID");
}
MONGO_UNREACHABLE;
}
MessageCompressorRegistry& MessageCompressorRegistry::get() {
static MessageCompressorRegistry globalRegistry;
return globalRegistry;
}
void MessageCompressorRegistry::registerImplementation(
std::unique_ptr<MessageCompressorBase> impl) {
// It's an error to register a compressor that's already been registered
fassert(40270,
_compressorsByName.find(impl->getName()) == _compressorsByName.end() &&
_compressorsByIds[impl->getId()] == nullptr);
// Check to see if this compressor is allowed by configuration
auto it = std::find(_compressorNames.begin(), _compressorNames.end(), impl->getName());
if (it == _compressorNames.end())
return;
_compressorsByName[impl->getName()] = impl.get();
_compressorsByIds[impl->getId()] = std::move(impl);
}
Status MessageCompressorRegistry::finalizeSupportedCompressors() {
for (auto it = _compressorNames.begin(); it != _compressorNames.end(); ++it) {
if (_compressorsByName.find(*it) == _compressorsByName.end()) {
std::stringstream ss;
ss << "Invalid network message compressor specified in configuration: " << *it;
return {ErrorCodes::BadValue, ss.str()};
}
}
return Status::OK();
}
const std::vector<std::string>& MessageCompressorRegistry::getCompressorNames() const {
return _compressorNames;
}
MessageCompressorBase* MessageCompressorRegistry::getCompressor(MessageCompressorId id) const {
return _compressorsByIds.at(id).get();
}
MessageCompressorBase* MessageCompressorRegistry::getCompressor(StringData name) const {
auto it = _compressorsByName.find(name.toString());
if (it == _compressorsByName.end())
return nullptr;
return it->second;
}
void MessageCompressorRegistry::setSupportedCompressors(std::vector<std::string>&& names) {
_compressorNames = std::move(names);
}
Status storeMessageCompressionOptions(const std::string& compressors) {
std::vector<std::string> restrict;
if (compressors != kDisabledConfigValue) {
boost::algorithm::split(restrict, compressors, boost::is_any_of(", "));
}
auto& compressorFactory = MessageCompressorRegistry::get();
compressorFactory.setSupportedCompressors(std::move(restrict));
return Status::OK();
}
// This instantiates and registers the "noop" compressor. It must happen after option storage
// because that's when the configuration of the compressors gets set.
MONGO_INITIALIZER_GENERAL(NoopMessageCompressorInit,
("EndStartupOptionStorage"),
("AllCompressorsRegistered"))
(InitializerContext* context) {
auto& compressorRegistry = MessageCompressorRegistry::get();
compressorRegistry.registerImplementation(std::make_unique<NoopMessageCompressor>());
}
// This cleans up any compressors that were requested by the user, but weren't registered by
// any compressor. It must be run after all the compressors have registered themselves with
// the global registry.
MONGO_INITIALIZER(AllCompressorsRegistered)(InitializerContext* context) {
uassertStatusOK(MessageCompressorRegistry::get().finalizeSupportedCompressors());
}
} // namespace mongo
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