Add name and uri helpers to Backend

Providing helper functions for the commonly used parts of the server makes
code easier to read. It also removes any possibility for formatting
problems by moving the URI and name string handling inside the Backend
class.

include/maxscale/backend.hh

@@ -15,6 +15,7 @@
 #include <maxscale/cppdefs.hh>
 
 #include <list>
+#include <string>
 #include <tr1/memory>
 
 #include <maxscale/service.h>
@@ -251,6 +252,21 @@ public:
      */
     bool has_failed() const;
 
+
+    /**
+     * @brief Get the object name of this server
+     *
+     * @return The unique object name of this server
+     */
+    const char* name() const;
+
+    /**
+     * @brief Get the address and port as a string
+     *
+     * @return The address and port combined into one string
+     */
+    const char* uri() const;
+
 private:
     /**
      * Internal state of the backend
@@ -284,6 +300,7 @@ private:
     int                m_state;            /**< State of the backend */
     SessionCommandList m_session_commands; /**< List of session commands that are
                                             * to be executed on this backend server */
+    std::string        m_uri;              /**< The combined address and port */
 };
 
 typedef std::tr1::shared_ptr<Backend> SBackend;