From e5b7380c874745c989d1816b8f552504f038e1bc Mon Sep 17 00:00:00 2001
From: lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68>
Date: Thu, 26 Sep 2013 20:33:20 +0000
Subject: 2.0 branch for possible maintenance release

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1526672 13f79535-47bb-0310-9956-ffa450edef68
---
 .../sca/core/invocation/InterceptorAsyncImpl.java  | 111 +++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 sca-java-2.x/branches/2.0/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/InterceptorAsyncImpl.java

(limited to 'sca-java-2.x/branches/2.0/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/InterceptorAsyncImpl.java')

diff --git a/sca-java-2.x/branches/2.0/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/InterceptorAsyncImpl.java b/sca-java-2.x/branches/2.0/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/InterceptorAsyncImpl.java
new file mode 100644
index 0000000000..265311fe6b
--- /dev/null
+++ b/sca-java-2.x/branches/2.0/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/InterceptorAsyncImpl.java
@@ -0,0 +1,111 @@
+/*
+ * 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.InvokerAsyncRequest;
+import org.apache.tuscany.sca.invocation.InvokerAsyncResponse;
+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 Invoker next;
+    protected InvokerAsyncResponse previous;
+    
+    public Invoker getNext() {
+        return (Invoker)next;
+    }
+    
+    public void setNext(Invoker next) {
+        this.next = next;
+    }
+    
+    public InvokerAsyncResponse getPrevious() {
+        return previous;
+    }
+    
+    public void setPrevious(InvokerAsyncResponse 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) throws Throwable {
+    	try{ 
+	        msg = processRequest(msg);
+	        InvokerAsyncRequest theNext = (InvokerAsyncRequest)getNext();
+	        if( theNext != null ) theNext.invokeAsyncRequest(msg);
+	        postProcessRequest(msg);
+    	} catch (Throwable e) {
+    		postProcessRequest(msg, e);
+    	} // end try
+    } // end method invokeAsyncRequest
+    
+    public void invokeAsyncResponse(Message msg) {
+        msg = processResponse(msg);
+        InvokerAsyncResponse thePrevious = (InvokerAsyncResponse)getPrevious();
+        if (thePrevious != null ) thePrevious.invokeAsyncResponse(msg);
+    } // end method invokeAsyncResponse
+
+    /**
+     * Basic null version of postProcessRequest - subclasses should override for any required
+     * real processing 
+     */
+    public Message postProcessRequest(Message msg) {
+    	// Default processing is to do nothing
+    	return msg;
+    } // end method postProcessRequest
+
+    /**
+     * Basic null version of postProcessRequest - subclasses should override for any required
+     * real processing 
+     * @throws Throwable 
+     */
+    public Message postProcessRequest(Message msg, Throwable e) throws Throwable {
+    	// Default processing is to rethrow the exception
+    	throw e;
+    } // end method postProcessRequest
+
+    
+    /**
+     * A testing method while I use the local SCA binding wire to look 
+     * at how the async response path works. This allows me to detect the
+     * point where the reference wire turns into the service with in the
+     * optimized case
+     * 
+     * @return
+     */
+    public boolean isLocalSCABIndingInvoker() {
+        return false;
+    }
+}
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