Fixed #1680

include/spdlog/cfg/log_levels.h

-// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-
-#pragma once
-
-#include <spdlog/logger.h>
-#include <string>
-#include <unordered_map>
-
-namespace spdlog {
-namespace cfg {
-class log_levels
-{
-    std::unordered_map<std::string, spdlog::level::level_enum> levels_;
-    spdlog::level::level_enum global_level_ = level::info;
-
-public:
-    void set(const std::string &logger_name, level::level_enum lvl)
-    {
-        levels_[logger_name] = lvl;
-    }
-
-    void set_global_level(level::level_enum lvl)
-    {
-        global_level_ = lvl;
-    }
-
-    level::level_enum default_level()
-    {
-        return global_level_;
-    }
-
-    // update log level of given logger if it appears in the config list or if default level is set
-    // return true if updated
-    bool update_logger_level(spdlog::logger &logger)
-    {
-        // if logger was not configured, check if global log level was configured
-        auto it = levels_.find(logger.name());
-        if (it == levels_.end())
-        {
-            it = levels_.find("*");
-        }
-        if (it != levels_.end())
-        {
-            logger.set_level(it->second);
-            return true;
-        }
-        return false;
-    }
-};
-} // namespace cfg
-} // namespace spdlog

include/spdlog/details/registry-inl.h

@@ -57,26 +57,38 @@ SPDLOG_INLINE void registry::register_logger(std::shared_ptr<logger> new_logger)
     register_logger_(std::move(new_logger));
 }
 
-SPDLOG_INLINE void registry::initialize_logger(std::shared_ptr<logger> new_logger)
+// set level if this logger was configured if the cfg_levels_
+// return true if found and set
+SPDLOG_INLINE bool registry::set_level_from_cfg_(logger *logger)
 {
-    std::lock_guard<std::mutex> lock(logger_map_mutex_);
-    new_logger->set_formatter(formatter_->clone());
-
-    if (err_handler_)
+    if (cfg_levels_.empty())
     {
-        new_logger->set_error_handler(err_handler_);
+        return false;
     }
-    // check if log level for this logger name was already configured
-    auto cfg_level_it = cfg_levels_.find(new_logger->name());
+    auto cfg_level_it = cfg_levels_.find(logger->name());
     if (cfg_level_it == cfg_levels_.end())
     {
+        // if logger name not found, set it anyway if "*" exists (i.e. all loggers)
         cfg_level_it = cfg_levels_.find(("*"));
     }
     if (cfg_level_it != cfg_levels_.end())
     {
-        new_logger->set_level(cfg_level_it->second);
+        logger->set_level(cfg_level_it->second);
+    }
+    return cfg_level_it != cfg_levels_.end();
+}
+
+SPDLOG_INLINE void registry::initialize_logger(std::shared_ptr<logger> new_logger)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    new_logger->set_formatter(formatter_->clone());
+
+    if (err_handler_)
+    {
+        new_logger->set_error_handler(err_handler_);
     }
-    else
+
+    if (!set_level_from_cfg_(new_logger.get()))
     {
         new_logger->set_level(global_log_level_);
     }
@@ -281,20 +293,9 @@ SPDLOG_INLINE void registry::set_levels(std::unordered_map<std::string, spdlog::
     std::lock_guard<std::mutex> lock(logger_map_mutex_);
     cfg_levels_ = std::move(levels);
 
-    // for each logger update level according to given map
-    // "*" entry means all loggers
-    auto global_level_it = cfg_levels_.find("*");
     for (auto &logger : loggers_)
     {
-        auto cfg_entry = cfg_levels_.find(logger.first);
-        if (cfg_entry != cfg_levels_.end())
-        {
-            logger.second->set_level(cfg_entry->second);
-        }
-        else if (global_level_it != cfg_levels_.end())
-        {
-            logger.second->set_level(global_level_it->second);
-        }
+        set_level_from_cfg_(logger.second.get());
     }
 }
 

include/spdlog/details/registry.h

@@ -89,6 +89,7 @@ private:
 
     void throw_if_exists_(const std::string &logger_name);
     void register_logger_(std::shared_ptr<logger> new_logger);
+    bool set_level_from_cfg_(logger *logger);
     std::mutex logger_map_mutex_, flusher_mutex_;
     std::recursive_mutex tp_mutex_;
     std::unordered_map<std::string, std::shared_ptr<logger>> loggers_;