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/**
* Copyright (C) 2019-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.
*/
#pragma once
#include <boost/container/small_vector.hpp>
#include <boost/log/attributes/value_extraction.hpp>
#include <boost/log/core/record_view.hpp>
#include <boost/log/expressions/message.hpp>
#include <boost/log/utility/formatting_ostream.hpp>
#include "mongo/bson/bsonobj.h"
#include "mongo/logv2/attribute_storage.h"
#include "mongo/logv2/attributes.h"
#include "mongo/logv2/constants.h"
#include "mongo/logv2/log_component.h"
#include "mongo/logv2/log_severity.h"
#include "mongo/logv2/log_tag.h"
#include "mongo/util/time_support.h"
#include <deque>
#include <fmt/format.h>
namespace mongo {
namespace logv2 {
struct TextValueExtractor {
void operator()(StringData name, CustomAttributeValue const& val) {
_storage.push_back(val.toString());
operator()(name, _storage.back());
}
void operator()(StringData name, const BSONObj* val) {
_storage.push_back(val->jsonString());
operator()(name, _storage.back());
}
template <typename T>
void operator()(StringData name, const T& val) {
args.push_back(fmt::internal::make_arg<fmt::format_context>(val));
}
boost::container::small_vector<fmt::basic_format_arg<fmt::format_context>,
constants::kNumStaticAttrs>
args;
private:
std::deque<std::string> _storage;
};
// Text formatter without metadata. Just contains the formatted message.
class PlainFormatter {
public:
static bool binary() {
return false;
};
void operator()(boost::log::record_view const& rec,
boost::log::formatting_ostream& strm) const {
using namespace boost::log;
StringData message = extract<StringData>(attributes::message(), rec).get();
const auto& attrs =
extract<TypeErasedAttributeStorage>(attributes::attributes(), rec).get();
TextValueExtractor extractor;
extractor.args.reserve(attrs.size());
attrs.apply(extractor);
fmt::memory_buffer buffer;
fmt::internal::vformat_to(buffer,
to_string_view(message),
fmt::basic_format_args<fmt::format_context>(
extractor.args.data(), extractor.args.size()));
strm.write(buffer.data(), buffer.size());
}
};
} // namespace logv2
} // namespace mongo
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