Fix issues

Signed-off-by: JCW <a1q123456@users.noreply.github.com>

cmake/RippledCore.cmake

@@ -52,7 +52,6 @@ target_link_libraries(xrpl.libpb
 add_library(xrpl.imports.main INTERFACE)
 
 find_package(RapidJSON)
-find_package(yyjson)
 
 target_link_libraries(xrpl.imports.main
   INTERFACE
@@ -78,7 +77,7 @@ add_module(xrpl beast)
 target_link_libraries(xrpl.libxrpl.beast PUBLIC
   xrpl.imports.main
   xrpl.libpb
-  yyjson::yyjson
+  rapidjson
 )
 
 # Level 02

conanfile.py

@@ -30,8 +30,7 @@ class Xrpl(ConanFile):
         'openssl/3.5.2',
         'soci/4.0.3',
         'zlib/1.3.1',
-        "rapidjson/1.1.0",
-        "yyjson/0.10.0"
+        "rapidjson/1.1.0"
     ]
 
     test_requires = [

include/xrpl/basics/Log.h

@@ -68,11 +68,11 @@ private:
         operator=(Sink const&) = delete;
 
         void
-        write(beast::severities::Severity level, std::string const& text)
+        write(beast::severities::Severity level, std::string&& text)
             override;
 
         void
-        writeAlways(beast::severities::Severity level, std::string const& text)
+        writeAlways(beast::severities::Severity level, std::string&& text)
             override;
     };
 
@@ -156,9 +156,10 @@ private:
     private:
         std::unique_ptr<std::ofstream> m_stream;
         boost::filesystem::path m_path;
+        std::mutex mutable fileMutex_;
     };
 
-    std::mutex mutable mutex_;
+    std::mutex mutable sinkSetMutex_;
     std::map<
         std::string,
         std::unique_ptr<beast::Journal::Sink>,

include/xrpl/beast/utility/Journal.h

@@ -22,9 +22,9 @@
 
 #include <xrpl/beast/utility/instrumentation.h>
 
-#include <boost/json.hpp>
+#include <rapidjson/document.h>
 
-#include <memory>
+#include <deque>
 #include <optional>
 #include <source_location>
 #include <sstream>
@@ -129,26 +129,23 @@ public:
         ripple::log::LogParameter<T> const& param);
 
     class Sink;
+
     class JsonLogAttributes
     {
     public:
-        using AttributeFields = boost::json::value;
+        using AttributeFields = rapidjson::Value;
 
         JsonLogAttributes();
         JsonLogAttributes(JsonLogAttributes const& other);
-        JsonLogAttributes(JsonLogAttributes&& other);
 
         JsonLogAttributes&
         operator=(JsonLogAttributes const& other);
 
-        JsonLogAttributes&
-        operator=(JsonLogAttributes&& other);
-
         void
         setModuleName(std::string const& name);
 
-        [[nodiscard]] static JsonLogAttributes
-        combine(AttributeFields const& a, AttributeFields const& b);
+        void
+        combine(AttributeFields const& from);
 
         AttributeFields&
         contextValues()
@@ -162,26 +159,50 @@ public:
             return contextValues_;
         }
 
+        rapidjson::MemoryPoolAllocator<>&
+        allocator()
+        {
+            return allocator_;
+        }
+
     private:
         AttributeFields contextValues_;
+        rapidjson::MemoryPoolAllocator<> allocator_;
 
         friend class Journal;
     };
 
-    struct JsonLogContext
+    class JsonLogContext
     {
-        std::source_location location = {};
-        boost::json::value messageParams;
+        rapidjson::Value attributes_;
+        rapidjson::MemoryPoolAllocator<> allocator_;
 
+    public:
         JsonLogContext() = default;
 
-        void
-        reset(std::source_location location_) noexcept
+        rapidjson::MemoryPoolAllocator<>&
+        allocator()
         {
-            location = location_;
-            messageParams = {};
-            messageParams.emplace_object();
+            return allocator_;
         }
+
+        rapidjson::Value&
+        messageParams()
+        {
+            return attributes_["Params"];
+        }
+
+        rapidjson::Value&
+        attributes()
+        {
+            return attributes_;
+        }
+
+        void
+        reset(
+            std::source_location location,
+            severities::Severity severity,
+            std::optional<JsonLogAttributes> const& attributes) noexcept;
     };
 
 private:
@@ -198,14 +219,13 @@ private:
     // Invariant: m_sink always points to a valid Sink
     Sink* m_sink = nullptr;
 
-    static void
-    initMessageContext(std::source_location location);
+    void
+    initMessageContext(
+        std::source_location location,
+        severities::Severity severity) const;
 
     static std::string
-    formatLog(
-        std::string const& message,
-        severities::Severity severity,
-        std::optional<JsonLogAttributes> const& attributes = std::nullopt);
+    formatLog(std::string&& message);
 
 public:
     //--------------------------------------------------------------------------
@@ -259,7 +279,7 @@ public:
             level is below the current threshold().
         */
         virtual void
-        write(Severity level, std::string const& text) = 0;
+        write(Severity level, std::string&& text) = 0;
 
         /** Bypass filter and write text to the sink at the specified severity.
          * Always write the message, but maintain the same formatting as if
@@ -269,7 +289,7 @@ public:
          * @param text Text to write to sink.
          */
         virtual void
-        writeAlways(Severity level, std::string const& text) = 0;
+        writeAlways(Severity level, std::string&& text) = 0;
 
     private:
         Severity thresh_;
@@ -298,25 +318,16 @@ public:
     {
     public:
         ScopedStream(ScopedStream const& other)
-            : ScopedStream(other.m_attributes, other.m_sink, other.m_level)
+            : ScopedStream(other.m_sink, other.m_level)
         {
         }
 
-        ScopedStream(
-            std::optional<JsonLogAttributes> attributes,
-            Sink& sink,
-            Severity level);
+        ScopedStream(Sink& sink, Severity level);
 
         template <typename T>
-        ScopedStream(
-            std::optional<JsonLogAttributes> attributes,
-            Stream const& stream,
-            T const& t);
+        ScopedStream(Stream const& stream, T const& t);
 
-        ScopedStream(
-            std::optional<JsonLogAttributes> attributes,
-            Stream const& stream,
-            std::ostream& manip(std::ostream&));
+        ScopedStream(Stream const& stream, std::ostream& manip(std::ostream&));
 
         ScopedStream&
         operator=(ScopedStream const&) = delete;
@@ -337,7 +348,6 @@ public:
         operator<<(T const& t) const;
 
     private:
-        std::optional<JsonLogAttributes> m_attributes;
         Sink& m_sink;
         Severity const m_level;
         std::ostringstream mutable m_ostream;
@@ -372,11 +382,7 @@ public:
 
             Constructor is inlined so checking active() very inexpensive.
         */
-        Stream(
-            std::optional<JsonLogAttributes> attributes,
-            Sink& sink,
-            Severity level)
-            : m_attributes(std::move(attributes)), m_sink(sink), m_level(level)
+        Stream(Sink& sink, Severity level) : m_sink(sink), m_level(level)
         {
             XRPL_ASSERT(
                 m_level < severities::kDisabled,
@@ -384,8 +390,7 @@ public:
         }
 
         /** Construct or copy another Stream. */
-        Stream(Stream const& other)
-            : Stream(other.m_attributes, other.m_sink, other.m_level)
+        Stream(Stream const& other) : Stream(other.m_sink, other.m_level)
         {
         }
 
@@ -432,7 +437,6 @@ public:
         /** @} */
 
     private:
-        std::optional<JsonLogAttributes> m_attributes;
         Sink& m_sink;
         Severity m_level;
     };
@@ -454,18 +458,15 @@ public:
     Journal(
         Journal const& other,
         std::optional<JsonLogAttributes> attributes = std::nullopt)
-        : m_sink(other.m_sink)
+            : m_attributes(other.m_attributes)
+            , m_sink(other.m_sink)
     {
         if (attributes.has_value())
-            m_attributes = std::move(attributes.value());
-        if (other.m_attributes.has_value())
         {
-            if (m_attributes.has_value())
-                m_attributes = JsonLogAttributes::combine(
-                    other.m_attributes->contextValues_,
-                    m_attributes->contextValues_);
+            if (m_attributes)
+                m_attributes->combine(attributes->contextValues_);
             else
-                m_attributes = other.m_attributes;
+                m_attributes = std::move(attributes);
         }
     }
     /** Create a journal that writes to the specified sink. */
@@ -510,9 +511,11 @@ public:
 
     /** Returns a stream for this sink, with the specified severity level. */
     Stream
-    stream(Severity level) const
+    stream(Severity level, std::source_location location = std::source_location::current()) const
     {
-        return Stream(m_attributes, *m_sink, level);
+        if (m_jsonLogsEnabled)
+            initMessageContext(location, level);
+        return Stream(*m_sink, level);
     }
 
     /** Returns `true` if any message would be logged at this severity level.
@@ -531,48 +534,50 @@ public:
     trace(std::source_location location = std::source_location::current()) const
     {
         if (m_jsonLogsEnabled)
-            initMessageContext(location);
-        return {m_attributes, *m_sink, severities::kTrace};
+            initMessageContext(location, severities::kTrace);
+        return {*m_sink, severities::kTrace};
     }
 
     Stream
     debug(std::source_location location = std::source_location::current()) const
     {
         if (m_jsonLogsEnabled)
-            initMessageContext(location);
-        return {m_attributes, *m_sink, severities::kDebug};
+            initMessageContext(location, severities::kDebug);
+        return {*m_sink, severities::kDebug};
     }
 
     Stream
     info(std::source_location location = std::source_location::current()) const
     {
         if (m_jsonLogsEnabled)
-            initMessageContext(location);
-        return {m_attributes, *m_sink, severities::kInfo};
+            initMessageContext(location, severities::kInfo);
+        return {*m_sink, severities::kInfo};
     }
 
     Stream
     warn(std::source_location location = std::source_location::current()) const
     {
+        char const* a = "a";
+        rapidjson::Value v{a, 1};
         if (m_jsonLogsEnabled)
-            initMessageContext(location);
-        return {m_attributes, *m_sink, severities::kWarning};
+            initMessageContext(location, severities::kWarning);
+        return {*m_sink, severities::kWarning};
     }
 
     Stream
     error(std::source_location location = std::source_location::current()) const
     {
         if (m_jsonLogsEnabled)
-            initMessageContext(location);
-        return {m_attributes, *m_sink, severities::kError};
+            initMessageContext(location, severities::kError);
+        return {*m_sink, severities::kError};
     }
 
     Stream
     fatal(std::source_location location = std::source_location::current()) const
     {
         if (m_jsonLogsEnabled)
-            initMessageContext(location);
-        return {m_attributes, *m_sink, severities::kFatal};
+            initMessageContext(location, severities::kFatal);
+        return {*m_sink, severities::kFatal};
     }
     /** @} */
 
@@ -591,8 +596,7 @@ public:
         {
             globalLogAttributes_ = JsonLogAttributes{};
         }
-        globalLogAttributes_ = JsonLogAttributes::combine(
-            globalLogAttributes_->contextValues(),
+        globalLogAttributes_->combine(
             globalLogAttributes.contextValues());
     }
 };
@@ -609,11 +613,8 @@ static_assert(std::is_nothrow_destructible<Journal>::value == true, "");
 //------------------------------------------------------------------------------
 
 template <typename T>
-Journal::ScopedStream::ScopedStream(
-    std::optional<JsonLogAttributes> attributes,
-    Stream const& stream,
-    T const& t)
-    : ScopedStream(std::move(attributes), stream.sink(), stream.level())
+Journal::ScopedStream::ScopedStream(Stream const& stream, T const& t)
+    : ScopedStream(stream.sink(), stream.level())
 {
     m_ostream << t;
 }
@@ -632,7 +633,7 @@ template <typename T>
 Journal::ScopedStream
 Journal::Stream::operator<<(T const& t) const
 {
-    return {m_attributes, *this, t};
+    return {*this, t};
 }
 
 namespace detail {
@@ -707,21 +708,39 @@ using logwstream = basic_logstream<wchar_t>;
 namespace ripple::log {
 
 namespace detail {
-
 template <typename T>
 void
 setJsonValue(
-    boost::json::value& object,
+    rapidjson::Value& object,
+    rapidjson::MemoryPoolAllocator<>& allocator,
     char const* name,
     T&& value,
     std::ostream* outStream)
 {
     using ValueType = std::decay_t<T>;
-    auto& root = object.as_object();
-
-    if constexpr (std::constructible_from<boost::json::value, ValueType>)
+    rapidjson::Value jsonValue;
+    if constexpr (std::constructible_from<
+                      rapidjson::Value,
+                      ValueType,
+                      rapidjson::MemoryPoolAllocator<>&>)
     {
-        root[name] = std::forward<T>(value);
+        jsonValue = rapidjson::Value{value, allocator};
+        if (outStream)
+        {
+            (*outStream) << value;
+        }
+    }
+    else if constexpr (std::constructible_from<rapidjson::Value, ValueType>)
+    {
+        jsonValue = rapidjson::Value{value};
+        if (outStream)
+        {
+            (*outStream) << value;
+        }
+    }
+    else if constexpr (std::same_as<ValueType, std::string>)
+    {
+        jsonValue = rapidjson::Value{value.c_str(), allocator};
         if (outStream)
         {
             (*outStream) << value;
@@ -732,13 +751,17 @@ setJsonValue(
         std::ostringstream oss;
         oss << value;
 
-        root[name] = oss.str();
+        jsonValue = rapidjson::Value{oss.str().c_str(), allocator};
 
         if (outStream)
         {
             (*outStream) << oss.str();
         }
     }
+
+    object.RemoveMember(name);
+    object.AddMember(
+        rapidjson::StringRef(name), std::move(jsonValue), allocator);
 }
 }  // namespace detail
 
@@ -749,7 +772,8 @@ operator<<(std::ostream& os, LogParameter<T> const& param)
     if (!beast::Journal::m_jsonLogsEnabled)
         return os;
     detail::setJsonValue(
-        beast::Journal::currentJsonLogContext_.messageParams,
+        beast::Journal::currentJsonLogContext_.messageParams(),
+        beast::Journal::currentJsonLogContext_.allocator(),
         param.name_,
         param.value_,
         &os);
@@ -763,7 +787,8 @@ operator<<(std::ostream& os, LogField<T> const& param)
     if (!beast::Journal::m_jsonLogsEnabled)
         return os;
     detail::setJsonValue(
-        beast::Journal::currentJsonLogContext_.messageParams,
+        beast::Journal::currentJsonLogContext_.messageParams(),
+        beast::Journal::currentJsonLogContext_.allocator(),
         param.name_,
         param.value_,
         nullptr);
@@ -791,7 +816,11 @@ attributes(Pair&&... pairs)
     beast::Journal::JsonLogAttributes result;
 
     (detail::setJsonValue(
-         result.contextValues(), pairs.first, pairs.second, nullptr),
+         result.contextValues(),
+         result.allocator(),
+         pairs.first,
+         pairs.second,
+         nullptr),
      ...);
 
     return result;

include/xrpl/beast/utility/WrappedSink.h

@@ -88,14 +88,14 @@ public:
     }
 
     void
-    write(beast::severities::Severity level, std::string const& text) override
+    write(beast::severities::Severity level, std::string&& text) override
     {
         using beast::Journal;
         sink_.write(level, prefix_ + text);
     }
 
     void
-    writeAlways(severities::Severity level, std::string const& text) override
+    writeAlways(severities::Severity level, std::string&& text) override
     {
         using beast::Journal;
         sink_.writeAlways(level, prefix_ + text);

src/libxrpl/basics/Log.cpp

@@ -47,20 +47,20 @@ Logs::Sink::Sink(
 }
 
 void
-Logs::Sink::write(beast::severities::Severity level, std::string const& text)
+Logs::Sink::write(beast::severities::Severity level, std::string&& text)
 {
     if (level < threshold())
         return;
 
-    logs_.write(level, partition_, text, console());
+    logs_.write(level, partition_, std::move(text), console());
 }
 
 void
 Logs::Sink::writeAlways(
     beast::severities::Severity level,
-    std::string const& text)
+    std::string&& text)
 {
-    logs_.write(level, partition_, text, console());
+    logs_.write(level, partition_, std::move(text), console());
 }
 
 //------------------------------------------------------------------------------
@@ -88,9 +88,13 @@ Logs::File::open(boost::filesystem::path const& path)
 
     if (stream->good())
     {
+        std::lock_guard lock(fileMutex_);
         m_path = path;
 
         m_stream = std::move(stream);
+        size_t const bufsize = 256 * 1024;
+        static char buf[bufsize];
+        m_stream->rdbuf()->pubsetbuf(buf, bufsize);
 
         wasOpened = true;
     }
@@ -109,12 +113,14 @@ Logs::File::closeAndReopen()
 void
 Logs::File::close()
 {
+    std::lock_guard lock(fileMutex_);
     m_stream = nullptr;
 }
 
 void
 Logs::File::write(char const* text)
 {
+    std::lock_guard lock(fileMutex_);
     if (m_stream != nullptr)
         (*m_stream) << text;
 }
@@ -122,10 +128,10 @@ Logs::File::write(char const* text)
 void
 Logs::File::writeln(char const* text)
 {
+    std::lock_guard lock(fileMutex_);
     if (m_stream != nullptr)
     {
-        (*m_stream) << text;
-        (*m_stream) << std::endl;
+        (*m_stream) << text << '\n';
     }
 }
 
@@ -145,7 +151,7 @@ Logs::open(boost::filesystem::path const& pathToLogFile)
 beast::Journal::Sink&
 Logs::get(std::string const& name)
 {
-    std::lock_guard lock(mutex_);
+    std::lock_guard lock(sinkSetMutex_);
     auto const result = sinks_.emplace(name, makeSink(name, thresh_));
     return *result.first->second;
 }
@@ -173,7 +179,7 @@ Logs::threshold() const
 void
 Logs::threshold(beast::severities::Severity thresh)
 {
-    std::lock_guard lock(mutex_);
+    std::lock_guard lock(sinkSetMutex_);
     thresh_ = thresh;
     for (auto& sink : sinks_)
         sink.second->threshold(thresh);
@@ -183,7 +189,7 @@ std::vector<std::pair<std::string, std::string>>
 Logs::partition_severities() const
 {
     std::vector<std::pair<std::string, std::string>> list;
-    std::lock_guard lock(mutex_);
+    std::lock_guard lock(sinkSetMutex_);
     list.reserve(sinks_.size());
     for (auto const& [name, sink] : sinks_)
         list.emplace_back(name, toString(fromSeverity(sink->threshold())));
@@ -199,7 +205,6 @@ Logs::write(
 {
     std::string s;
     format(s, text, level, partition);
-    std::lock_guard lock(mutex_);
     file_.writeln(s);
     if (!silent_)
         std::cerr << s << '\n';
@@ -211,7 +216,6 @@ Logs::write(
 std::string
 Logs::rotate()
 {
-    std::lock_guard lock(mutex_);
     bool const wasOpened = file_.closeAndReopen();
     if (wasOpened)
         return "The log file was closed and reopened.";
@@ -332,11 +336,11 @@ Logs::format(
     beast::severities::Severity severity,
     std::string const& partition)
 {
-    output.reserve(message.size() + partition.size() + 100);
-
+    output = message;
     if (!beast::Journal::isStructuredJournalEnabled())
     {
-        output = to_string(std::chrono::system_clock::now());
+        output.reserve(output.size() + partition.size() + 100);
+        output += to_string(std::chrono::system_clock::now());
 
         output += " ";
         if (!partition.empty())
@@ -369,8 +373,6 @@ Logs::format(
         }
     }
 
-    output += message;
-
     // Limit the maximum length of the output
     if (output.size() > maximumMessageCharacters)
     {

src/libxrpl/beast/utility/beast_Journal.cpp

@@ -19,6 +19,10 @@
 
 #include <xrpl/beast/utility/Journal.h>
 
+#include <rapidjson/document.h>
+#include <rapidjson/stringbuffer.h>
+#include <rapidjson/writer.h>
+
 #include <ios>
 #include <ostream>
 #include <ranges>
@@ -73,12 +77,12 @@ public:
     }
 
     void
-    write(severities::Severity, std::string const&) override
+    write(severities::Severity, std::string&&) override
     {
     }
 
     void
-    writeAlways(severities::Severity, std::string const&) override
+    writeAlways(severities::Severity, std::string&&) override
     {
     }
 };
@@ -121,18 +125,13 @@ severities::to_string(Severity severity)
 
 Journal::JsonLogAttributes::JsonLogAttributes()
 {
-    contextValues_ = {};
-    contextValues_.emplace_object();
+    contextValues_.SetObject();
 }
 
 Journal::JsonLogAttributes::JsonLogAttributes(JsonLogAttributes const& other)
 {
-    contextValues_ = other.contextValues_;
-}
-
-Journal::JsonLogAttributes::JsonLogAttributes(JsonLogAttributes&& other)
-{
-    contextValues_ = std::move(other.contextValues_);
+    contextValues_.SetObject();
+    contextValues_.CopyFrom(other.contextValues_, allocator_);
 }
 
 Journal::JsonLogAttributes&
@@ -142,102 +141,151 @@ Journal::JsonLogAttributes::operator=(JsonLogAttributes const& other)
     {
         return *this;
     }
-    contextValues_ = other.contextValues_;
-    return *this;
-}
-
-Journal::JsonLogAttributes&
-Journal::JsonLogAttributes::operator=(JsonLogAttributes&& other)
-{
-    if (&other == this)
-    {
-        return *this;
-    }
-
-    contextValues_ = std::move(other.contextValues_);
+    contextValues_.CopyFrom(other.contextValues_, allocator_);
     return *this;
 }
 
 void
 Journal::JsonLogAttributes::setModuleName(std::string const& name)
 {
-    contextValues_.as_object()["Module"] = name;
-}
-
-Journal::JsonLogAttributes
-Journal::JsonLogAttributes::combine(
-    AttributeFields const& a,
-    AttributeFields const& b)
-{
-    JsonLogAttributes result;
-
-    result.contextValues_ = a;
-
-    for (auto& [key, value] : b.as_object())
-    {
-        result.contextValues_.as_object()[key] = value;
-    }
-
-    return result;
+    contextValues_.AddMember(
+        rapidjson::StringRef("Module"),
+        rapidjson::Value{name.c_str(), allocator_},
+        allocator_);
 }
 
 void
-Journal::initMessageContext(std::source_location location)
+Journal::JsonLogAttributes::combine(
+    AttributeFields const& from)
 {
-    currentJsonLogContext_.reset(location);
+    for (auto& member : from.GetObject())
+    {
+        contextValues_.RemoveMember(member.name);
+
+        contextValues_.AddMember(
+            rapidjson::Value{member.name, allocator_},
+            rapidjson::Value{member.value, allocator_},
+            allocator_);
+    }
+}
+
+void
+Journal::JsonLogContext::reset(
+    std::source_location location,
+    severities::Severity severity,
+    std::optional<JsonLogAttributes> const& attributes) noexcept
+{
+    struct ThreadIdStringInitializer
+    {
+        std::string value;
+        ThreadIdStringInitializer()
+        {
+            std::stringstream threadIdStream;
+            threadIdStream << std::this_thread::get_id();
+            value = threadIdStream.str();
+        }
+    };
+    thread_local ThreadIdStringInitializer const threadId;
+
+    attributes_.SetObject();
+    if (globalLogAttributes_.has_value())
+    {
+        attributes_.CopyFrom(globalLogAttributes_->contextValues(), allocator_);
+        if (attributes.has_value())
+        {
+            for (auto const& [key, value] :
+             attributes->contextValues().GetObject())
+            {
+                attributes_.RemoveMember(key);
+
+                rapidjson::Value jsonValue;
+                jsonValue.CopyFrom(value, allocator_);
+
+                attributes_.AddMember(
+                    rapidjson::Value{key, allocator_},
+                    rapidjson::Value{value, allocator_},
+                    allocator_);
+            }
+        }
+    }
+    else if (attributes.has_value())
+    {
+        attributes_.CopyFrom(attributes->contextValues(), allocator_);
+    }
+
+    attributes_.RemoveMember("Function");
+    attributes_.AddMember(
+        rapidjson::StringRef("Function"),
+        rapidjson::Value{location.function_name(), allocator_},
+        allocator_);
+
+    attributes_.RemoveMember("File");
+    attributes_.AddMember(
+        rapidjson::StringRef("File"),
+        rapidjson::Value{location.file_name(), allocator_},
+        allocator_);
+
+    attributes_.RemoveMember("Line");
+    attributes_.AddMember(
+        rapidjson::StringRef("Line"),
+        location.line(),
+        allocator_);
+    attributes_.RemoveMember("ThreadId");
+    attributes_.AddMember(
+        rapidjson::StringRef("ThreadId"),
+        rapidjson::Value{threadId.value.c_str(), allocator_},
+        allocator_);
+    attributes_.RemoveMember("Params");
+    attributes_.AddMember(
+        rapidjson::StringRef("Params"),
+        rapidjson::Value{rapidjson::kObjectType},
+        allocator_);
+    auto severityStr = to_string(severity);
+    attributes_.RemoveMember("Level");
+    attributes_.AddMember(
+        rapidjson::StringRef("Level"),
+        rapidjson::Value{severityStr.c_str(), allocator_},
+        allocator_);
+    attributes_.RemoveMember("Time");
+    attributes_.AddMember(
+        rapidjson::StringRef("Time"),
+        std::chrono::duration_cast<std::chrono::milliseconds>(
+            std::chrono::system_clock::now().time_since_epoch())
+            .count(),
+        allocator_);
+}
+
+void
+Journal::initMessageContext(
+    std::source_location location,
+    severities::Severity severity) const
+{
+    currentJsonLogContext_.reset(location, severity, m_attributes);
 }
 
 std::string
-Journal::formatLog(
-    std::string const& message,
-    severities::Severity severity,
-    std::optional<JsonLogAttributes> const& attributes)
+Journal::formatLog(std::string&& message)
 {
     if (!m_jsonLogsEnabled)
     {
         return message;
     }
 
-    boost::json::value doc;
+    auto& attributes = currentJsonLogContext_.attributes();
 
-    if (globalLogAttributes_)
-    {
-        doc = globalLogAttributes_->contextValues_;
-    }
-    else
-    {
-        doc.emplace_object();
-    }
+    attributes.RemoveMember("Message");
+    attributes.AddMember(
+        rapidjson::StringRef("Message"),
+        rapidjson::Value{rapidjson::StringRef(message.c_str()), currentJsonLogContext_.allocator()},
+        currentJsonLogContext_.allocator()
+    );
 
-    if (attributes.has_value())
-    {
-        for (auto& [key, value] : attributes->contextValues_.as_object())
-        {
-            doc.as_object()[key] = value;
-        }
-    }
+    rapidjson::StringBuffer buffer;
+    rapidjson::Writer writer(buffer);
 
-    auto& logContext = doc.as_object();
+    attributes.Accept(writer);
 
-    logContext["Function"] = currentJsonLogContext_.location.function_name();
-    logContext["File"] = currentJsonLogContext_.location.file_name();
-    logContext["Line"] = currentJsonLogContext_.location.line();
-
-    std::stringstream threadIdStream;
-    threadIdStream << std::this_thread::get_id();
-    auto threadIdStr = threadIdStream.str();
-
-    logContext["ThreadId"] = threadIdStr;
-    logContext["Params"] = currentJsonLogContext_.messageParams;
-    auto severityStr = to_string(severity);
-    logContext["Level"] = severityStr;
-    logContext["Message"] = message;
-    logContext["Time"] =
-        std::chrono::duration_cast<std::chrono::milliseconds>(
-            std::chrono::system_clock::now().time_since_epoch())
-            .count();
-
-    return boost::json::serialize(doc);
+    return {buffer.GetString()};
 }
 
 void
@@ -298,34 +346,30 @@ Journal::Sink::threshold(Severity thresh)
 
 //------------------------------------------------------------------------------
 
-Journal::ScopedStream::ScopedStream(
-    std::optional<JsonLogAttributes> attributes,
-    Sink& sink,
-    Severity level)
-    : m_attributes(std::move(attributes)), m_sink(sink), m_level(level)
+Journal::ScopedStream::ScopedStream(Sink& sink, Severity level)
+    : m_sink(sink), m_level(level)
 {
     // Modifiers applied from all ctors
     m_ostream << std::boolalpha << std::showbase;
 }
 
 Journal::ScopedStream::ScopedStream(
-    std::optional<JsonLogAttributes> attributes,
     Stream const& stream,
     std::ostream& manip(std::ostream&))
-    : ScopedStream(std::move(attributes), stream.sink(), stream.level())
+    : ScopedStream(stream.sink(), stream.level())
 {
     m_ostream << manip;
 }
 
 Journal::ScopedStream::~ScopedStream()
 {
-    std::string const& s(m_ostream.str());
+    std::string s = m_ostream.str();
     if (!s.empty())
     {
         if (s == "\n")
-            m_sink.write(m_level, formatLog("", m_level, m_attributes));
+            m_sink.write(m_level, formatLog(""));
         else
-            m_sink.write(m_level, formatLog(s, m_level, m_attributes));
+            m_sink.write(m_level, formatLog(std::move(s)));
     }
 }
 
@@ -340,7 +384,7 @@ Journal::ScopedStream::operator<<(std::ostream& manip(std::ostream&)) const
 Journal::ScopedStream
 Journal::Stream::operator<<(std::ostream& manip(std::ostream&)) const
 {
-    return {m_attributes, *this, manip};
+    return {*this, manip};
 }
 
 }  // namespace beast

src/test/beast/beast_Journal_test.cpp

@@ -48,14 +48,14 @@ public:
         }
 
         void
-        write(severities::Severity level, std::string const&) override
+        write(severities::Severity level, std::string&&) override
         {
             if (level >= threshold())
                 ++m_count;
         }
 
         void
-        writeAlways(severities::Severity level, std::string const&) override
+        writeAlways(severities::Severity level, std::string&&) override
         {
             ++m_count;
         }

src/test/csf/Sim.h

@@ -49,7 +49,7 @@ public:
     }
 
     void
-    write(beast::severities::Severity level, std::string const& text) override
+    write(beast::severities::Severity level, std::string&& text) override
     {
         if (level < threshold())
             return;
@@ -59,7 +59,7 @@ public:
     }
 
     void
-    writeAlways(beast::severities::Severity level, std::string const& text)
+    writeAlways(beast::severities::Severity level, std::string&& text)
         override
     {
         std::cout << clock_.now().time_since_epoch().count() << " " << text

src/test/jtx/CaptureLogs.h

@@ -57,7 +57,7 @@ class CaptureLogs : public Logs
         }
 
         void
-        write(beast::severities::Severity level, std::string const& text)
+        write(beast::severities::Severity level, std::string&& text)
             override
         {
             std::lock_guard lock(strmMutex_);
@@ -65,7 +65,7 @@ class CaptureLogs : public Logs
         }
 
         void
-        writeAlways(beast::severities::Severity level, std::string const& text)
+        writeAlways(beast::severities::Severity level, std::string&& text)
             override
         {
             std::lock_guard lock(strmMutex_);

src/test/jtx/CheckMessageLogs.h

@@ -45,7 +45,7 @@ class CheckMessageLogs : public Logs
         }
 
         void
-        write(beast::severities::Severity level, std::string const& text)
+        write(beast::severities::Severity level, std::string&& text)
             override
         {
             if (text.find(owner_.msg_) != std::string::npos)
@@ -53,10 +53,10 @@ class CheckMessageLogs : public Logs
         }
 
         void
-        writeAlways(beast::severities::Severity level, std::string const& text)
+        writeAlways(beast::severities::Severity level, std::string&& text)
             override
         {
-            write(level, text);
+            write(level, std::move(text));
         }
     };
 

src/test/server/Server_test.cpp

@@ -89,7 +89,7 @@ public:
         }
 
         void
-        write(beast::severities::Severity level, std::string const& text)
+        write(beast::severities::Severity level, std::string&& text)
             override
         {
             if (level < threshold())
@@ -99,7 +99,7 @@ public:
         }
 
         void
-        writeAlways(beast::severities::Severity level, std::string const& text)
+        writeAlways(beast::severities::Severity level, std::string&& text)
             override
         {
             suite_.log << text << std::endl;

src/test/unit_test/SuiteJournal.h

@@ -49,27 +49,27 @@ public:
     }
 
     void
-    write(beast::severities::Severity level, std::string const& text) override;
+    write(beast::severities::Severity level, std::string&& text) override;
 
     void
-    writeAlways(beast::severities::Severity level, std::string const& text)
+    writeAlways(beast::severities::Severity level, std::string&& text)
         override;
 };
 
 inline void
 SuiteJournalSink::write(
     beast::severities::Severity level,
-    std::string const& text)
+    std::string&& text)
 {
     // Only write the string if the level at least equals the threshold.
     if (level >= threshold())
-        writeAlways(level, text);
+        writeAlways(level, std::move(text));
 }
 
 inline void
 SuiteJournalSink::writeAlways(
     beast::severities::Severity level,
-    std::string const& text)
+    std::string&& text)
 {
     using namespace beast::severities;
 
@@ -137,15 +137,15 @@ public:
     }
 
     void
-    write(beast::severities::Severity level, std::string const& text) override
+    write(beast::severities::Severity level, std::string&& text) override
     {
         if (level < threshold())
             return;
-        writeAlways(level, text);
+        writeAlways(level, std::move(text));
     }
 
     inline void
-    writeAlways(beast::severities::Severity level, std::string const& text)
+    writeAlways(beast::severities::Severity level, std::string&& text)
         override
     {
         strm_ << text << std::endl;

src/tests/libxrpl/basics/log.cpp

@@ -49,14 +49,14 @@ private:
         operator=(Sink const&) = delete;
 
         void
-        write(beast::severities::Severity level, std::string const& text)
+        write(beast::severities::Severity level, std::string&& text)
             override
         {
             logs_.logStream_ << text;
         }
 
         void
-        writeAlways(beast::severities::Severity level, std::string const& text)
+        writeAlways(beast::severities::Severity level, std::string&& text)
             override
         {
             logs_.logStream_ << text;
@@ -195,7 +195,6 @@ TEST_CASE("Global attributes inheritable")
 
     CHECK(jsonLog.IsObject());
     CHECK(jsonLog.HasMember("Field1"));
-    CHECK(jsonLog.HasMember("Field2"));
     CHECK(jsonLog["Field1"].IsString());
     // Field1 should be overwritten to Value3
     CHECK(jsonLog["Field1"].GetString() == std::string{"Value3"});
@@ -218,13 +217,13 @@ public:
     }
 
     void
-    write(beast::severities::Severity level, std::string const& text) override
+    write(beast::severities::Severity level, std::string&& text) override
     {
         strm_ << text;
     }
 
     void
-    writeAlways(beast::severities::Severity level, std::string const& text)
+    writeAlways(beast::severities::Severity level, std::string&& text)
         override
     {
         strm_ << text;
@@ -413,8 +412,6 @@ TEST_CASE_FIXTURE(JsonLogStreamFixture, "TestJsonLogParams")
                              "Field2",
                              std::numeric_limits<std::uint64_t>::max());
 
-    auto test = stream().str();
-
     rapidjson::Document logValue;
     logValue.Parse(stream().str().c_str());