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diff --git a/sandbox/sebastien/java/vhost/unreleased/samples/implementation-sample-async/src/test/java/sampleasync/impl/UpperSampleAsyncReferenceImpl.java b/sandbox/sebastien/java/vhost/unreleased/samples/implementation-sample-async/src/test/java/sampleasync/impl/UpperSampleAsyncReferenceImpl.java
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index 0000000000..101c6a4399
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+++ b/sandbox/sebastien/java/vhost/unreleased/samples/implementation-sample-async/src/test/java/sampleasync/impl/UpperSampleAsyncReferenceImpl.java
@@ -0,0 +1,74 @@
+/*
+ * 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 sampleasync.impl;
+
+import static java.lang.System.out;
+import static sample.Xutil.elem;
+import static sample.Xutil.text;
+import static sample.Xutil.xdom;
+
+import org.w3c.dom.Element;
+
+import sample.api.Java;
+import sample.api.WSDL;
+import sample.api.WSDLReference;
+import sampleasync.Upper;
+
+/**
+ * Sample component implementation that uses Java interfaces.
+ * 
+ * @version $Rev$ $Date$
+ */
+@Java(Upper.class)
+public class UpperSampleAsyncReferenceImpl {
+    
+    @WSDL("http://sample/upper#Upper")
+    WSDLReference upper;
+    Element response;
+    
+    public String upper(String s) {
+        out.println("UpperSampleAsyncReferenceImpl.upper(" + s + ")");
+        
+        // TODO - I'm passing in the non-wrapped version of the parameter
+        //        here which doesn't seem right. If I pass in the wrapped
+        //        version then the databinding won't unwrap on the reference
+        //        side as it thinks the target Java interface is bare?
+        final Element ureq = xdom("http://sample/upper", "s", text(s));
+        upper.callAsync("upper", ureq);
+        
+        try {
+            Thread.sleep(500);
+        } catch (Exception ex) {
+            // do nothing
+        }
+        
+        return response.getTextContent();
+    }
+    
+    /**
+     *  In this implementation the convention is that the 
+     *  async callback arrives at an operation named
+     *  operationName + Callback
+     */
+    public void upperCallback(Element response) {
+        out.println("UpperSampleAsyncReferenceImpl.upperCallback(" + response.getTextContent() + ")");
+        this.response = response;
+    }
+}