polish

spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/zuul/filters/SimpleRouteLocator.java

@@ -88,12 +88,14 @@ public class SimpleRouteLocator implements RouteLocator {
 			this.routes.set(locateRoutes());
 		}
 
-		log.debug("servletPath=" + this.dispatcherServletPath);
-		log.debug("zuulServletPath=" + this.zuulServletPath);
-		log.debug("RequestUtils.isDispatcherServletRequest()="
-				+ RequestUtils.isDispatcherServletRequest());
-		log.debug("RequestUtils.isZuulServletRequest()="
-				+ RequestUtils.isZuulServletRequest());
+		if (log.isDebugEnabled()) {
+			log.debug("servletPath=" + this.dispatcherServletPath);
+			log.debug("zuulServletPath=" + this.zuulServletPath);
+			log.debug("RequestUtils.isDispatcherServletRequest()="
+					+ RequestUtils.isDispatcherServletRequest());
+			log.debug("RequestUtils.isZuulServletRequest()="
+					+ RequestUtils.isZuulServletRequest());
+		}
 
 		String adjustedPath = adjustPath(path);
 
@@ -108,7 +110,9 @@ public class SimpleRouteLocator implements RouteLocator {
 				}
 			}
 		}
-		log.debug("route matched=" + route);
+		if (log.isDebugEnabled()) {
+			log.debug("route matched=" + route);
+		}
 
 		return getRoute(route, adjustedPath);