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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.
*/
#pragma once
#include <boost/optional.hpp>
#include "mongo/base/status.h"
#include "mongo/bson/util/builder.h"
#include "mongo/db/tenant_id.h"
#include "mongo/logv2/attribute_storage.h"
#include "mongo/logv2/log_attr.h"
#include "mongo/logv2/log_component.h"
#include "mongo/logv2/log_domain.h"
#include "mongo/logv2/log_options.h"
#include "mongo/logv2/log_severity.h"
#include "mongo/util/errno_util.h"
namespace mongo::logv2 {
// Whether there is a doLogImpl call currently on this thread's stack.
bool loggingInProgress();
// Write message to stderr in a signal-safe manner.
void signalSafeWriteToStderr(StringData message);
namespace detail {
using GetTenantIDFn = std::function<boost::optional<TenantId>()>;
void setGetTenantIDCallback(GetTenantIDFn&& fn);
void doLogImpl(int32_t id,
LogSeverity const& severity,
LogOptions const& options,
StringData message,
TypeErasedAttributeStorage const& attrs);
void doUnstructuredLogImpl(LogSeverity const& severity, // NOLINT
LogOptions const& options,
StringData message,
TypeErasedAttributeStorage const& attrs);
// doLogUnpacked overloads require the arguments to be flattened attributes
template <typename S, typename... Args>
void doLogUnpacked(int32_t id,
LogSeverity const& severity,
LogOptions const& options,
const S& message,
const NamedArg<Args>&... args) {
auto attributes = AttributeStorage(args...);
fmt::string_view msg{message};
doLogImpl(id, severity, options, StringData(msg.data(), msg.size()), attributes);
}
template <typename S, size_t N, typename... Args>
void doLogUnpacked(int32_t id,
LogSeverity const& severity,
LogOptions const& options,
const S&, // formatMsg not used
const char (&msg)[N],
const NamedArg<Args>&... args) {
doLogUnpacked(id, severity, options, msg, args...);
}
template <typename S>
void doLogUnpacked(int32_t id,
LogSeverity const& severity,
LogOptions const& options,
const S& message,
const DynamicAttributes& dynamicAttrs) {
fmt::string_view msg{message};
doLogImpl(id, severity, options, StringData(msg.data(), msg.size()), dynamicAttrs);
}
template <typename S, size_t N>
void doLogUnpacked(int32_t id,
LogSeverity const& severity,
LogOptions const& options,
const S&, // formatMsg not used
const char (&msg)[N],
const DynamicAttributes& dynamicAttrs) {
doLogUnpacked(id, severity, options, msg, dynamicAttrs);
}
// Args may be raw attributes or CombinedAttr's here. We need to flatten any combined attributes
// into just raw attributes for doLogUnpacked. We do this building flat tuples for every argument,
// concatenating them into a single tuple that we can expand again using apply.
template <typename S, typename... Args>
void doLog(int32_t id,
LogSeverity const& severity,
LogOptions const& options,
const S& formatMsg,
const Args&... args) {
std::apply([id, &severity, &options, &formatMsg](
auto&&... args) { doLogUnpacked(id, severity, options, formatMsg, args...); },
std::tuple_cat(toFlatAttributesTupleRef(args)...));
}
template <typename S, size_t N, typename... Args>
void doLog(int32_t id,
LogSeverity const& severity,
LogOptions const& options,
const S& formatMsg,
const char (&msg)[N],
const Args&... args) {
std::apply(
[id, &severity, &options, &formatMsg, &msg](auto&&... unpackedArgs) {
doLogUnpacked(id, severity, options, formatMsg, msg, unpackedArgs...);
},
std::tuple_cat(toFlatAttributesTupleRef(args)...));
}
} // namespace detail
} // namespace mongo::logv2
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