2 files changed, 114 insertions, 0 deletions
diff --git a/sca-java-2.x/trunk/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/InterceptorAsync.java b/sca-java-2.x/trunk/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/InterceptorAsync.java
new file mode 100644
index 0000000000..3819147526
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/core-spi/src/main/java/org/apache/tuscany/sca/invocation/InterceptorAsync.java
@@ -0,0 +1,40 @@
+/*
+ * 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 org.apache.tuscany.sca.invocation;
+
+/**
+ * Allows asynchronous wires to be navigated in reverse in order for the 
+ * reponse to be processed. 
+ *
+ */
+public interface InterceptorAsync extends Interceptor, InvokerAsync {
+
+    /**
+     * Sets the previous invoker
+     * @param next The previous invoker
+     */
+    void setPrevious(InvokerAsync previous);
+
+    /**
+     * Returns the previous invoker or null
+     * @return The previous Invoker
+     */
+    InvokerAsync getPrevious();
+
+}
diff --git a/sca-java-2.x/trunk/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/InterceptorAsyncImpl.java b/sca-java-2.x/trunk/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/InterceptorAsyncImpl.java
new file mode 100644
index 0000000000..0c42a523a6
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/InterceptorAsyncImpl.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 org.apache.tuscany.sca.core.invocation;
+
+
+import org.apache.tuscany.sca.invocation.InterceptorAsync;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.InvokerAsync;
+import org.apache.tuscany.sca.invocation.Message;
+
+/**
+ * A base class that holds the mechanics for representing 
+ * chained interceptors and for driving processing up and 
+ * down the chain. 
+ *
+ */
+public abstract class InterceptorAsyncImpl implements InterceptorAsync {
+    
+    protected InvokerAsync next;
+    protected InvokerAsync previous;
+    
+    public Invoker getNext() {
+        return (Invoker)next;
+    }
+    
+    public void setNext(Invoker next) {
+        this.next = (InvokerAsync)next;
+    }
+    
+    public InvokerAsync getPrevious() {
+        return previous;
+    }
+    
+    public void setPrevious(InvokerAsync previous) {
+        this.previous = previous;
+    }
+    
+    public Message invoke(Message msg) {
+        msg = processRequest(msg);
+        Message resultMsg = getNext().invoke(msg);
+        resultMsg = processResponse(resultMsg);
+        return resultMsg;
+    }
+    
+    public void invokeAsyncRequest(Message msg) {
+        msg = processRequest(msg);
+        ((InvokerAsync)getNext()).invokeAsyncRequest(msg);
+    }
+    
+    public Message invokeAsyncResponse(Message msg) {
+        msg = processResponse(msg);
+        if (getPrevious() != null){
+            return ((InvokerAsync)getPrevious()).invokeAsyncResponse(msg);
+        }
+        return msg;
+    }
+}