From c8a471118f4ee5d081c140976f65720f32938959 Mon Sep 17 00:00:00 2001
From: antelder <antelder@13f79535-47bb-0310-9956-ffa450edef68>
Date: Wed, 27 May 2009 06:23:18 +0000
Subject: Add a Tuscany annotation processor so servlets etc can use SCA
 annotations

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@779022 13f79535-47bb-0310-9956-ffa450edef68
---
 .../sca/tomcat/TuscanyAnnotationsProcessor.java    | 85 ++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 java/sca/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyAnnotationsProcessor.java

(limited to 'java/sca/distribution')

diff --git a/java/sca/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyAnnotationsProcessor.java b/java/sca/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyAnnotationsProcessor.java
new file mode 100644
index 0000000000..8dfd8175e4
--- /dev/null
+++ b/java/sca/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyAnnotationsProcessor.java
@@ -0,0 +1,85 @@
+/*
+ * 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.tomcat;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import javax.naming.NamingException;
+import javax.servlet.ServletContext;
+
+import org.apache.AnnotationProcessor;
+import org.apache.catalina.util.DefaultAnnotationProcessor;
+
+public class TuscanyAnnotationsProcessor implements AnnotationProcessor {
+
+    private TuscanyStandardContext tuscanyStandardContext;
+    private AnnotationProcessor tomcatAnnotationProcessor;
+    private Method tuscanyInjectMethod;
+    
+    public TuscanyAnnotationsProcessor(TuscanyStandardContext tuscanyStandardContext, javax.naming.Context context) {
+        this.tuscanyStandardContext = tuscanyStandardContext;
+        this.tomcatAnnotationProcessor = new DefaultAnnotationProcessor(context);
+        initInjectMethod(tuscanyStandardContext);
+    }
+
+    private void initInjectMethod(TuscanyStandardContext tuscanyStandardContext) {
+        
+        // this needs to use reflection as the tuscany-hook module can't have any
+        // dependencies on the tuscany runtime modules as they're not 
+        // in the server classpath 
+        // TODO: is there a nicer way ?
+        
+        ClassLoader cl = tuscanyStandardContext.getParentClassLoader();
+        try {
+            Class<?> c = Class.forName("org.apache.tuscany.sca.implementation.web.runtime.utils.ContextHelper", true, cl);
+            if (c != null) {
+                this.tuscanyInjectMethod = c.getMethod("inject", new Class[]{Object.class, ServletContext.class});
+            }
+        } catch (Exception e){
+            // ignore
+        }
+    }
+    
+    public void postConstruct(Object instance) throws IllegalAccessException, InvocationTargetException {
+        tomcatAnnotationProcessor.postConstruct(instance);
+    }
+
+    public void preDestroy(Object instance) throws IllegalAccessException, InvocationTargetException {
+        tomcatAnnotationProcessor.preDestroy(instance);
+    }
+
+    public void processAnnotations(Object instance) throws IllegalAccessException, InvocationTargetException, NamingException {
+        if (tuscanyInjectMethod != null) {
+            ServletContext sc = tuscanyStandardContext.getServletContext();
+            if (sc != null) {
+                Object rc = sc.getAttribute("org.apache.tuscany.sca.implementation.web.RuntimeComponent");
+                if (rc != null) {
+                    try {
+                        tuscanyInjectMethod.invoke(null, instance, sc);
+                    } catch (Exception e) {
+                        throw new InvocationTargetException(e);
+                    }
+                }
+            }
+        }
+        tomcatAnnotationProcessor.processAnnotations(instance);
+    }
+}
-- 
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