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diff --git a/sandbox/sebastien/java/wrapped/samples/learning-more/async/calculator-contribution/src/main/java/calculator/CalculatorServiceProxyImpl.java b/sandbox/sebastien/java/wrapped/samples/learning-more/async/calculator-contribution/src/main/java/calculator/CalculatorServiceProxyImpl.java
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+++ b/sandbox/sebastien/java/wrapped/samples/learning-more/async/calculator-contribution/src/main/java/calculator/CalculatorServiceProxyImpl.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package calculator;
+
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+
+import javax.xml.ws.Response;
+
+import org.oasisopen.sca.annotation.Reference;
+
+/**
+ * An implementation of the Calculator service which just proxies
+ * to sync and asyn versions of the calculator service. This proxy
+ * exercises the various async interface alternatives
+ */
+public class CalculatorServiceProxyImpl implements CalculatorServiceSync {
+	
+	@Reference
+	protected CalculateReferenceAsync calculatorServiceRefSync;
+	
+	@Reference
+	protected CalculateReferenceAsync calculatorServiceRefAsync;
+
+	@Override
+	public String calculate(Integer n1) {
+	    String result = null;
+	    
+	    // calculate using a sync service
+	    System.out.println("Calling sync service for calculate");
+	    result = calculate(calculatorServiceRefSync, n1);
+	    
+	    // calculate using an aycn service
+	    System.out.println("Calling async service for calculate");
+	    result += calculate(calculatorServiceRefAsync, n1);
+	    
+	    return result;
+	}    
+	    
+	// exercise sync and async versions of a service interface method
+	private String calculate(CalculateReferenceAsync calculatorRef, Integer n1) {	    
+		
+		// sync
+		String result = calculatorRef.calculate(1);
+		System.out.println("Sync client patern: result = " + result);
+		
+		// async poll
+		Response<String> response = calculatorRef.calculateAsync(20);
+		
+		while (!response.isDone()){
+			System.out.println("Waiting for poll");
+			try {
+			    Thread.sleep(500);
+			} catch (Exception ex) {
+			    // do nothing
+			}
+		}
+		
+		try {
+			result = response.get();
+			System.out.println("Async client poll patern: result = " + result);
+		} catch (InterruptedException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		} catch (ExecutionException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+		
+		// async callback 
+		CalculatorAsyncHandler handler = new CalculatorAsyncHandler();
+		Future<String> future = calculatorRef.calculateAsync(3, handler);
+		
+		while (!future.isDone()){
+			System.out.println("Waiting for callback");
+	        try {
+                Thread.sleep(500);
+            } catch (Exception ex) {
+                // do nothing
+            }
+		}
+
+		return result;
+	}
+	
+/* TUSCANY-3757
+    @Override
+*/
+    public void print(Integer n1) {
+        
+        // calculate using a sync service
+        System.out.println("Calling sync service for print");
+        //print(calculatorServiceRefSync, n1);
+        
+        // calculate using an asycn service
+        System.out.println("Calling async service for print");
+        //print(calculatorServiceRefAsync, n1);
+    }    
+        
+/* TUSCANY-3757    
+    // exercise sync and async versions of a service interface method
+    private void print(CalculateReferenceAsync calculatorRef, Integer n1) {       
+        
+        // sync
+        calculatorRef.print(1);
+        
+        // async poll
+        Response<Void> response = calculatorRef.printAsync(20);
+    
+        // async callback 
+        CalculatorPrintAsyncHandler handler = new CalculatorPrintAsyncHandler();
+        Future<Void> future = calculatorRef.printAsync(3, handler);
+      
+    }
+*/	
+}