ad online features

recommend-feature-client/src/main/java/com/tzld/piaoquan/recommend/feature/domain/ad/base/AdRankItem.java

@@ -26,6 +26,8 @@ public class AdRankItem implements Comparable<AdRankItem> {
     // 记录Item侧用到的特征
     private AdItemFeature itemFeature;
 
+    private String lrSampleString = "";
+
     public AdRankItem() {
         //TODO
     }