1 files changed, 199 insertions, 0 deletions
diff --git a/sandbox/ant/sca/tags/2.0-M2/modules/node-api/src/main/java/org/apache/tuscany/sca/node/NodeFactory.java b/sandbox/ant/sca/tags/2.0-M2/modules/node-api/src/main/java/org/apache/tuscany/sca/node/NodeFactory.java
new file mode 100644
index 0000000000..426c32bd49
--- /dev/null
+++ b/sandbox/ant/sca/tags/2.0-M2/modules/node-api/src/main/java/org/apache/tuscany/sca/node/NodeFactory.java
@@ -0,0 +1,199 @@
+/*
+ * 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.node;
+
+import java.lang.reflect.InvocationTargetException;
+
+import org.oasisopen.sca.CallableReference;
+import org.oasisopen.sca.ServiceReference;
+import org.oasisopen.sca.ServiceRuntimeException;
+
+/**
+ * A factory for SCA processing nodes. An SCA processing node can be loaded
+ * with an SCA composite and the SCA contributions required by the composite.
+ * 
+ * @version $Rev$ $Date$
+ */
+public abstract class NodeFactory {
+
+    public static class NodeProxy implements Node, Client {
+        private Object node;
+
+        private NodeProxy(Object node) {
+            super();
+            this.node = node;
+        }
+
+        public static <T> T createProxy(Class<T> type, Object node) {
+            try {
+                return type.getDeclaredConstructor(Object.class).newInstance(node);
+            } catch (Exception e) {
+                throw new IllegalArgumentException(e);
+            }
+        }
+
+        public <B, R extends CallableReference<B>> R cast(B target) throws IllegalArgumentException {
+            try {
+                return (R)node.getClass().getMethod("cast", Object.class).invoke(node, target);
+            } catch (Throwable e) {
+                handleException(e);
+                return null;
+            }
+        }
+
+        public <B> B getService(Class<B> businessInterface, String serviceName) {
+            try {
+                return (B)node.getClass().getMethod("getService", Class.class, String.class).invoke(node,
+                                                                                                    businessInterface,
+                                                                                                    serviceName);
+            } catch (Throwable e) {
+                handleException(e);
+                return null;
+            }
+        }
+
+        public <B> ServiceReference<B> getServiceReference(Class<B> businessInterface, String serviceName) {
+            try {
+                return (ServiceReference<B>)node.getClass().getMethod("getServiceReference", Class.class, String.class)
+                    .invoke(node, businessInterface, serviceName);
+            } catch (Throwable e) {
+                handleException(e);
+                return null;
+            }
+        }
+
+        public void start() {
+            try {
+                node.getClass().getMethod("start").invoke(node);
+            } catch (Throwable e) {
+                handleException(e);
+            }
+        }
+
+        public void stop() {
+            try {
+                node.getClass().getMethod("stop").invoke(node);
+            } catch (Throwable e) {
+                handleException(e);
+            }
+        }
+
+        public void destroy() {
+            try {
+                node.getClass().getMethod("destroy").invoke(node);
+            } catch (Throwable e) {
+                handleException(e);
+            }
+        }
+
+        private static void handleException(Throwable ex) {
+            if (ex instanceof InvocationTargetException) {
+                ex = ((InvocationTargetException)ex).getTargetException();
+            }
+            if (ex instanceof RuntimeException) {
+                throw (RuntimeException)ex;
+            }
+            if (ex instanceof Error) {
+                throw (Error)ex;
+            } else {
+                throw new RuntimeException(ex);
+            }
+        }
+
+    }
+
+    /**
+     * Returns a new SCA node factory instance.
+     *  
+     * @return a new SCA node factory
+     */
+    public static NodeFactory newInstance() {
+        NodeFactory scaNodeFactory = null;
+
+        try {
+            // final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+            // Use reflection APIs to call ServiceDiscovery to avoid hard dependency to tuscany-extensibility
+            try {
+                Class<?> discoveryClass = Class.forName("org.apache.tuscany.sca.extensibility.ServiceDiscovery");
+                Object instance = discoveryClass.getMethod("getInstance").invoke(null);
+                Object factoryDeclaration = discoveryClass.getMethod("getFirstServiceDeclaration", String.class).invoke(instance, NodeFactory.class.getName());
+                if (factoryDeclaration != null) {
+                    Class<?> factoryImplClass = (Class<?>)factoryDeclaration.getClass().getMethod("loadClass").invoke(factoryDeclaration);
+                    scaNodeFactory = (NodeFactory)factoryImplClass.newInstance();
+                    return scaNodeFactory;
+                }
+            } catch (ClassNotFoundException e) {
+                // Ignore 
+            }
+
+            // Fail back to default impl
+            String className = "org.apache.tuscany.sca.node.impl.NodeFactoryImpl";
+
+            Class<?> cls = Class.forName(className);
+            scaNodeFactory = (NodeFactory)cls.newInstance();
+            return scaNodeFactory;
+
+        } catch (Exception e) {
+            throw new ServiceRuntimeException(e);
+        }
+    }
+
+    /**
+     * Creates a new SCA node using defaults for the contribution location and runnable composite
+     * 
+     * @return a new SCA node.
+     */
+    public abstract Node createNode();
+
+    /**
+     * Creates a new SCA node from the configuration URL
+     * 
+     * @param configurationURL the URL of the node configuration which is the ATOM feed
+     * that contains the URI of the composite and a collection of URLs for the contributions
+     *  
+     * @return a new SCA node.
+     */
+    public abstract Node createNode(String configurationURL);
+
+    /**
+     * Creates a new SCA node.
+     * 
+     * @param compositeURI the URI of the composite to use 
+     * @param contributions the URI of the contributions that provides the composites and related 
+     * artifacts. If the list is empty, then we will use the thread context classloader to discover
+     * the contribution on the classpath
+     *   
+     * @return a new SCA node.
+     */
+    public abstract Node createNode(String compositeURI, Contribution... contributions);
+
+    /**
+     * Creates a new SCA node.
+     * 
+     * @param compositeURI the URI of the composite to use 
+     * @param compositeContent the XML content of the composite to use 
+     * @param contributions the URI of the contributions that provides the composites and related artifacts 
+     * @return a new SCA node.
+     */
+    public abstract Node createNode(String compositeURI,
+                                          String compositeContent,
+                                          Contribution... contributions);
+
+}