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diff --git a/sandbox/sebastien/java/vhost/samples/extending-tuscany/implementation-sample/src/main/java/sample/impl/SampleWSDLInvoker.java b/sandbox/sebastien/java/vhost/samples/extending-tuscany/implementation-sample/src/main/java/sample/impl/SampleWSDLInvoker.java
new file mode 100644
index 0000000000..3f68d5d219
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+++ b/sandbox/sebastien/java/vhost/samples/extending-tuscany/implementation-sample/src/main/java/sample/impl/SampleWSDLInvoker.java
@@ -0,0 +1,91 @@
+/*
+ * 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 sample.impl;
+
+import java.lang.reflect.Method;
+
+import org.apache.tuscany.sca.core.invocation.AsyncResponseInvoker;
+import org.apache.tuscany.sca.core.invocation.InterceptorAsyncImpl;
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLOperation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
+import org.oasisopen.sca.ServiceRuntimeException;
+import org.w3c.dom.Element;
+
+/**
+ * Invoker for Sample components that implement a WSDL interface using a generic
+ * call method.
+ * 
+ * @version $Rev$ $Date$
+ */
+class SampleWSDLInvoker extends InterceptorAsyncImpl {
+    final String name;
+    final Object instance;
+    final Method doccall;
+    final Method rpccall;
+
+    static Method method(final Class<?> clazz, final String name, final Class<?>... types) {
+        try {
+            return clazz.getMethod("doccall", String.class, Element.class);
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+    SampleWSDLInvoker(final WSDLOperation op, final Class<?> clazz, final Object instance) throws SecurityException, NoSuchMethodException {
+        this.name = op.getName();
+        this.instance = instance;
+        this.doccall = method(clazz, "doccall", String.class, Element.class);
+        this.rpccall = method(clazz, "rpccall", String.class, Object[].class);
+    }
+
+    public Invoker getNext() {
+        // Can't get next for an implementation invoker
+        return null;
+    }
+
+    public Message invoke(final Message msg) {
+        return processRequest(msg);
+    }
+    
+    public Message processRequest(Message msg) {
+        try {
+            // Invoke the generic call method
+            if (doccall != null) {
+                // Document style (args wrapped in a single wrapper element)
+                final Object response = doccall.invoke(instance, name, ((Object[])msg.getBody())[0]);
+                msg.setBody(response);
+            } else {
+                // RPC style (args are passed as an array)
+                final Object response = rpccall.invoke(instance, name, (Object[])msg.getBody());
+                msg.setBody(response);
+            }
+        } catch(Exception e) {
+            e.printStackTrace();
+            msg.setFaultBody(e.getCause());
+        }
+        return msg;
+    }
+    
+    public Message processResponse(Message msg) {
+        return msg;
+    }
+}