1 files changed, 92 insertions, 0 deletions
diff --git a/src/mongo/logv2/plain_formatter.cpp b/src/mongo/logv2/plain_formatter.cpp
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+++ b/src/mongo/logv2/plain_formatter.cpp
@@ -0,0 +1,92 @@
+/**
+ *    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/plain_formatter.h"
+
+#include "mongo/bson/bsonobj.h"
+#include "mongo/logv2/attribute_storage.h"
+#include "mongo/logv2/attributes.h"
+#include "mongo/logv2/constants.h"
+
+#include <boost/container/small_vector.hpp>
+#include <boost/log/attributes/value_extraction.hpp>
+#include <boost/log/expressions/message.hpp>
+#include <boost/log/utility/formatting_ostream.hpp>
+
+#include <deque>
+#include <fmt/format.h>
+
+namespace mongo::logv2 {
+namespace {
+
+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;
+};
+
+}  // namespace
+
+void PlainFormatter::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 mongo::logv2