Resolve some review comments

alfresco-transformer-base/src/main/java/org/alfresco/transformer/TransformRegistryImpl.java

@@ -40,10 +40,12 @@ import org.alfresco.transform.client.registry.TransformCache;
 import org.alfresco.transform.exceptions.TransformException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.core.io.Resource;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.core.io.ResourceLoader;
 
 /**
  * Used by clients to work out if a transformation is supported based on the engine_config.json.
@@ -52,13 +54,22 @@ public class TransformRegistryImpl extends AbstractTransformRegistry
 {
     private static final Logger log = LoggerFactory.getLogger(TransformRegistryImpl.class);
 
-    // TODO - do we really need this string?
+    @Autowired
+    ResourceLoader resourceLoader;
+
     @Value("${transform.config.location:classpath:engine_config.json}")
     private String locationFromProperty;
 
-    @Value("${transform.config.location:classpath:engine_config.json}")
     private Resource engineConfig;
 
+    @PostConstruct
+    public void afterPropertiesSet()
+    {
+        engineConfig = resourceLoader.getResource(locationFromProperty);
+        TransformConfig transformConfig = getTransformConfig();
+        registerAll(transformConfig, null, locationFromProperty);
+    }
+
     // Holds the structures used by AbstractTransformRegistry to look up what is supported.
     // Unlike other sub classes this class does not extend Data or replace it at run time.
     private TransformCache data = new TransformCache();
@@ -74,17 +85,10 @@ public class TransformRegistryImpl extends AbstractTransformRegistry
         catch (IOException e)
         {
             throw new TransformException(INTERNAL_SERVER_ERROR.value(),
-                "Could not read " + engineConfig.getDescription(), e);
+                "Could not read " + locationFromProperty, e);
         }
     }
 
-    @PostConstruct
-    public void afterPropertiesSet()
-    {
-        TransformConfig transformConfig = getTransformConfig();
-        registerAll(transformConfig, null, locationFromProperty);
-    }
-
     @Override
     public TransformCache getData()
     {