Allow getting config options and add multiple overloads for set

include/cppkafka/configuration_base.h

@@ -0,0 +1,33 @@
+#ifndef CPPKAFKA_CONFIGURATION_BASE_H
+#define CPPKAFKA_CONFIGURATION_BASE_H
+
+#include <string>
+
+namespace cppkafka {
+
+template <typename Concrete>
+class ConfigurationBase {
+public:
+    void set(const std::string& name, bool value) {
+        proxy_set(name, value ? "true" : "false");
+    }
+
+    // Overload for any integral value
+    template <typename T,
+              typename = typename std::enable_if<std::is_integral<T>::value>::type>
+    void set(const std::string& name, T value) {
+        proxy_set(name, std::to_string(value));
+    }
+
+    void set(const std::string& name, const char* value) {
+        proxy_set(name, value);
+    }
+private:
+    void proxy_set(const std::string& name, const std::string& value) {
+        static_cast<Concrete&>(*this).set(name, value);
+    }
+};
+
+} // cppkafka
+
+#endif // CPPKAFKA_CONFIGURATION_BASE_H