MXS-1474 Refactor for forthcoming changes

server/modules/filter/cache/cachefiltersession.cc

@@ -918,11 +918,42 @@ CacheFilterSession::routing_action_t CacheFilterSession::route_COM_QUERY(GWBUF*
 
             if (CACHE_RESULT_IS_OK(result))
             {
+                action = route_SELECT(pPacket);
+            }
+            else
+            {
+                MXS_ERROR("Could not create cache key.");
+                m_state = CACHE_IGNORING_RESPONSE;
+            }
+        }
+        else
+        {
+            m_state = CACHE_IGNORING_RESPONSE;
+        }
+    }
+
+    return action;
+}
+
+
+/**
+ * Routes a SELECT packet.
+ *
+ * @param pPacket  A contiguous COM_QUERY packet containing a SELECT.
+ *
+ * @return ROUTING_ABORT if the processing of the packet should be aborted
+ *         (as the data is obtained from the cache) or
+ *         ROUTING_CONTINUE if the normal processing should continue.
+ */
+CacheFilterSession::routing_action_t CacheFilterSession::route_SELECT(GWBUF* pPacket)
+{
+    routing_action_t action = ROUTING_CONTINUE;
+
     if (m_pCache->should_use(m_pSession))
     {
         uint32_t flags = CACHE_FLAGS_INCLUDE_STALE;
         GWBUF* pResponse;
-                    result = m_pCache->get_value(m_key, flags, &pResponse);
+        cache_result_t result = m_pCache->get_value(m_key, flags, &pResponse);
 
         if (CACHE_RESULT_IS_OK(result))
         {
@@ -998,18 +1029,6 @@ CacheFilterSession::routing_action_t CacheFilterSession::route_COM_QUERY(GWBUF*
         }
         m_state = CACHE_EXPECTING_RESPONSE;
     }
-            }
-            else
-            {
-                MXS_ERROR("Could not create cache key.");
-                m_state = CACHE_IGNORING_RESPONSE;
-            }
-        }
-        else
-        {
-            m_state = CACHE_IGNORING_RESPONSE;
-        }
-    }
 
     return action;
 }

server/modules/filter/cache/cachefiltersession.hh

@@ -118,6 +118,7 @@ private:
     };
 
     routing_action_t route_COM_QUERY(GWBUF* pPacket);
+    routing_action_t route_SELECT(GWBUF* pPacket);
 
 private:
     CacheFilterSession(MXS_SESSION* pSession, Cache* pCache, char* zDefaultDb);