updated README

applications/cafe-scripted/README.md

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+Cafe Demo - Scripted Implementation
+===================================
+
+This is the scripted implementation of the classic **cafe** sample application. You can choose among **javascript**,
+**groovy**, **ruby**, and **python** scripting languages. The functionality is basically identical in all cases to the 
+original cafe demo. 
+
+# Instructions for running the CafeDemo sample
+
+The script language is passed as a command line argument. This may be run directly from maven:
+>mvn clean compile
+
+>mvn exec:exec -Dlang=[language]
+
+## Groovy Control Bus
+This sample also demonstrates the use of Spring Integration's **groovy control bus** which accepts
+Groovy scripts as control messages. These scripts may invoke lifecycle operations on adapters or 
+operations on managed beans.
+
+To demonstrate the control bus, while the CafeDemoApp is running, execute in a separate window:
+
+>mvn exec:exec -Pcontrol-bus
+
+This will use groovy scripts to 
+ * Query the waiter for the total number of orders delivered
+ * If the total orders > 3, stop the inbound adaptor on the cafe (the order flow). The Cafe application
+ will continue to run, but eventually the output will stop when all pending orders have completed.