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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.
*/
#include "mongo/logv2/bson_formatter.h"
#include <boost/log/attributes/value_extraction.hpp>
#include <boost/log/utility/formatting_ostream.hpp>
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/bsonobjbuilder.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/logv2/name_extractor.h"
#include "mongo/logv2/named_arg_formatter.h"
#include "mongo/util/time_support.h"
#include <fmt/format.h>
namespace mongo {
namespace logv2 {
namespace {
struct BSONValueExtractor {
BSONValueExtractor(BSONObjBuilder& builder)
: _builder(builder.subobjStart(constants::kAttributesFieldName)) {}
~BSONValueExtractor() {
_builder.done();
}
void operator()(StringData name, CustomAttributeValue const& val) {
if (val.BSONAppend) {
val.BSONAppend(_builder, name);
} else if (val.toBSON) {
_builder.append(name, val.toBSON());
} else {
_builder.append(name, val.toString());
}
}
// BSONObj is coming as a pointer, the generic one handles references
void operator()(StringData name, const BSONObj* val) {
_builder.append(name, *val);
}
// BSON is lacking unsigned types, so store unsigned int32 as signed int64
void operator()(StringData name, unsigned int val) {
_builder.append(name, static_cast<long long>(val));
}
// BSON is lacking unsigned types, so store unsigned int64 as signed int64, users need to deal
// with this.
void operator()(StringData name, unsigned long long val) {
_builder.append(name, static_cast<long long>(val));
}
template <typename T>
void operator()(StringData name, const T& value) {
_builder.append(name, value);
}
private:
BSONObjBuilder _builder;
};
} // namespace
void BSONFormatter::operator()(boost::log::record_view const& rec,
boost::log::formatting_ostream& strm) const {
using boost::log::extract;
// Build a JSON object for the user attributes.
const auto& attrs = extract<TypeErasedAttributeStorage>(attributes::attributes(), rec).get();
BSONObjBuilder builder;
builder.append(constants::kTimestampFieldName,
extract<Date_t>(attributes::timeStamp(), rec).get());
builder.append(constants::kSeverityFieldName,
extract<LogSeverity>(attributes::severity(), rec).get().toStringDataCompact());
builder.append(constants::kComponentFieldName,
extract<LogComponent>(attributes::component(), rec).get().getNameForLog());
builder.append(constants::kContextFieldName,
extract<StringData>(attributes::threadName(), rec).get());
auto stable_id = extract<StringData>(attributes::stableId(), rec).get();
if (!stable_id.empty()) {
builder.append(constants::kStableIdFieldName, stable_id);
}
detail::NameExtractor nameExtractor;
attrs.apply(nameExtractor);
// Insert the attribute names back into the message string using a special formatter
fmt::memory_buffer buffer;
fmt::vformat_to<detail::NamedArgFormatter, char>(
buffer,
extract<StringData>(attributes::message(), rec).get().toString(),
fmt::basic_format_args<fmt::format_context>(nameExtractor.nameArgs.data(),
nameExtractor.nameArgs.size()));
builder.append(constants::kMessageFieldName, fmt::to_string(buffer));
if (!attrs.empty()) {
BSONValueExtractor extractor(builder);
attrs.apply(extractor);
}
LogTag tags = extract<LogTag>(attributes::tags(), rec).get();
if (tags != LogTag::kNone) {
builder.append(constants::kTagsFieldName, tags.toBSON());
}
BSONObj obj = builder.obj();
strm.write(obj.objdata(), obj.objsize());
}
} // namespace logv2
} // namespace mongo
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