INTSAMPLES-34 Added sample for enriching a Map

basic/enricher/README.md

@@ -14,19 +14,19 @@ You can run the sample application by either
     - mvn package
     - mvn exec:java
 
-This example illustrates the usage of the Content Enricher by covering 2 use-cases.
-Once the application is started, you can execute each individual use case by:
-
+This example illustrates the usage of the Content Enricher.           
+                                                                          
+Once the application has started, lease execute the various Content Enricher examples by                               
+     
 * entering 1 + Enter
 * entering 2 + Enter
-
-Each use case will trigger slightly different Spring Integration message flows. For
-both flows a **User** object containing only the **username** is passed in through a *Gateway*.
-
-However the Enrichment is executed differently for each flow:
-
-* 1: In the *Enricher*, pass the full **User** object to the **request channel**.
-* 2: In the *Enricher*, pass only the **username** to the **request channel** by using the **request-payload-expression** attribute.
+* entering 3 + Enter
+                                                                     
+3 different message flows are triggered. For use-cases 1+2 a **User** object containing only the **username** is passed in. For use-case 3 a Map with the **username** key is passed in and enriched with the **User** object using the **user** key:                          
+                                                                          
+* 1: In the *Enricher*, pass the full **User** object to the **request channel**. 
+* 2: In the *Enricher*, pass only the **username** to the **request channel** by using the **request-payload-expression** attribute.   
+* 3: In the *Enricher*, pass only the username to the **request channel**, executing the same Service Activator as in **2**.
 
 # Resources