Invoke error callback if present instead of log callback (#93)

Author: accelerated

Diff for: include/cppkafka/configuration.h

@@ -62,19 +62,22 @@ class KafkaHandleBase;
 class CPPKAFKA_API Configuration : public ConfigurationBase<Configuration> {
 public:
     using DeliveryReportCallback = std::function<void(Producer& producer, const Message&)>;
-    using OffsetCommitCallback = std::function<void(Consumer& consumer, Error,
+    using OffsetCommitCallback = std::function<void(Consumer& consumer,
+                                                    Error error,
                                                     const TopicPartitionList& topic_partitions)>;
-    using ErrorCallback = std::function<void(KafkaHandleBase& handle, int error,
+    using ErrorCallback = std::function<void(KafkaHandleBase& handle,
+                                             int error,
                                              const std::string& reason)>;
     using ThrottleCallback = std::function<void(KafkaHandleBase& handle,
                                                 const std::string& broker_name,
                                                 int32_t broker_id,
                                                 std::chrono::milliseconds throttle_time)>;
-    using LogCallback = std::function<void(KafkaHandleBase& handle, int level,
+    using LogCallback = std::function<void(KafkaHandleBase& handle,
+                                           int level,
                                            const std::string& facility,
                                            const std::string& message)>;
     using StatsCallback = std::function<void(KafkaHandleBase& handle, const std::string& json)>;
-    using SocketCallback = std::function<int(int domain, int type, int protoco)>;
+    using SocketCallback = std::function<int(int domain, int type, int protocol)>;
 
     using ConfigurationBase<Configuration>::set;
     using ConfigurationBase<Configuration>::get;

Diff for: src/consumer.cpp

@@ -79,16 +79,19 @@ Consumer::~Consumer() {
         rebalance_error_callback_ = nullptr;
         close();
     }
-    catch (const Exception& ex) {
-        const char* library_name = "cppkafka";
+    catch (const HandleException& ex) {
         ostringstream error_msg;
         error_msg << "Failed to close consumer [" << get_name() << "]: " << ex.what();
-        CallbackInvoker<Configuration::LogCallback> logger("log", get_configuration().get_log_callback(), nullptr);
-        if (logger) {
-            logger(*this, static_cast<int>(LogLevel::LOG_ERR), library_name, error_msg.str());
+        CallbackInvoker<Configuration::ErrorCallback> error_cb("error", get_configuration().get_error_callback(), this);
+        CallbackInvoker<Configuration::LogCallback> logger_cb("log", get_configuration().get_log_callback(), nullptr);
+        if (error_cb) {
+            error_cb(*this, static_cast<int>(ex.get_error().get_error()), error_msg.str());
+        }
+        else if (logger_cb) {
+            logger_cb(*this, static_cast<int>(LogLevel::LOG_ERR), "cppkafka", error_msg.str());
         }
         else {
-            rd_kafka_log_print(get_handle(), static_cast<int>(LogLevel::LOG_ERR), library_name, error_msg.str().c_str());
+            rd_kafka_log_print(get_handle(), static_cast<int>(LogLevel::LOG_ERR), "cppkafka", error_msg.str().c_str());
         }
     }
 }