szaszm commented on code in PR #1670:
URL: https://github.com/apache/nifi-minifi-cpp/pull/1670#discussion_r1343695599


##########
libminifi/src/c2/C2Agent.cpp:
##########
@@ -151,16 +151,16 @@ void C2Agent::configure(const std::shared_ptr<Configure> 
&configure, bool reconf
     if (!configure->get(Configuration::nifi_c2_agent_protocol_class, 
"c2.agent.protocol.class", clazz)) {
       clazz = "RESTSender";
     }
-    logger_->log_info("Class is %s", clazz);
+    logger_->log_info("Class is {}", clazz);
 
     auto protocol = 
core::ClassLoader::getDefaultClassLoader().instantiateRaw(clazz, clazz);
     if (protocol == nullptr) {
-      logger_->log_warn("Class %s not found", clazz);
+      logger_->log_warn("Class {} not found", clazz);
       protocol = 
core::ClassLoader::getDefaultClassLoader().instantiateRaw("RESTSender", 
"RESTSender");
       if (!protocol) {
-        const char* errmsg = "Attempted to load RESTSender. To enable C2, 
please specify an active protocol for this agent.";
-        logger_->log_error(errmsg);
-        throw Exception{ GENERAL_EXCEPTION, errmsg };
+        constexpr std::string_view errmsg = "Attempted to load RESTSender. To 
enable C2, please specify an active protocol for this agent.";
+        logger_->log_error("{}", errmsg);
+        throw Exception{ GENERAL_EXCEPTION, std::string(errmsg) };

Review Comment:
   looks good to me



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