1 files changed, 422 insertions, 0 deletions
diff --git a/tags/java/sca/2.0-M3/modules/node-api/src/main/java/org/apache/tuscany/sca/node/NodeFactory.java b/tags/java/sca/2.0-M3/modules/node-api/src/main/java/org/apache/tuscany/sca/node/NodeFactory.java
new file mode 100644
index 0000000000..94df876a31
--- /dev/null
+++ b/tags/java/sca/2.0-M3/modules/node-api/src/main/java/org/apache/tuscany/sca/node/NodeFactory.java
@@ -0,0 +1,422 @@
+/*
+ * 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 static org.apache.tuscany.sca.node.ContributionLocationHelper.getContributionLocations;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.Reader;
+import java.lang.reflect.InvocationTargetException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.net.URLConnection;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.apache.tuscany.sca.node.configuration.DefaultNodeConfigurationFactory;
+import org.apache.tuscany.sca.node.configuration.NodeConfiguration;
+import org.apache.tuscany.sca.node.configuration.NodeConfigurationFactory;
+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 extends DefaultNodeConfigurationFactory {
+    /**
+     * Default location of contribution metadata in an SCA contribution.
+     */
+    private static final String SCA_CONTRIBUTION_META = "META-INF/sca-contribution.xml";
+
+    /**
+     * Default location of a generated contribution metadata in an SCA contribution.
+     */
+    private static final String SCA_CONTRIBUTION_GENERATED_META = "META-INF/sca-contribution-generated.xml";
+
+    protected static NodeFactory nodeFactory;
+
+    protected static void setNodeFactory(NodeFactory factory) {
+        nodeFactory = factory;
+    }
+
+    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 Node start() {
+            try {
+                return new NodeProxy(node.getClass().getMethod("start").invoke(node));
+            } catch (Throwable e) {
+                handleException(e);
+                return null;
+            }
+        }
+
+        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() {
+        if (nodeFactory != null) {
+            return nodeFactory;
+        }
+
+        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("getServiceDeclaration", String.class).invoke(instance,
+                                                                                           NodeFactory.class.getName());
+                if (factoryDeclaration != null) {
+                    Class<?> factoryImplClass =
+                        (Class<?>)factoryDeclaration.getClass().getMethod("loadClass").invoke(factoryDeclaration);
+                    nodeFactory = (NodeFactory)factoryImplClass.newInstance();
+                    return nodeFactory;
+                }
+            } catch (ClassNotFoundException e) {
+                // Ignore
+            }
+
+            // Fail back to default impl
+            String className = "org.apache.tuscany.sca.node.impl.NodeFactoryImpl";
+
+            Class<?> cls = Class.forName(className);
+            nodeFactory = (NodeFactory)cls.newInstance();
+            return nodeFactory;
+
+        } catch (Exception e) {
+            throw new ServiceRuntimeException(e);
+        }
+    }
+
+    /**
+     * Open a URL connection without cache
+     * @param url
+     * @return
+     * @throws IOException
+     */
+    private static InputStream openStream(URL url) throws IOException {
+        InputStream is = null;
+        URLConnection connection = url.openConnection();
+        connection.setUseCaches(false);
+        is = connection.getInputStream();
+        return is;
+    }
+
+    /**
+     * Escape the space in URL string
+     * @param uri
+     * @return
+     */
+    private static URI createURI(String uri) {
+        int index = uri.indexOf(':');
+        String scheme = null;
+        String ssp = uri;
+        if (index != -1) {
+            scheme = uri.substring(0, index);
+            ssp = uri.substring(index + 1);
+        }
+        try {
+            return new URI(scheme, ssp, null);
+        } catch (URISyntaxException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    /**
+     * Creates a new SCA node from the configuration URL
+     *
+     * @param configurationURL the URL of the node configuration which is the XML document
+     * that contains the URI of the composite and a collection of URLs for the contributions
+     *
+     * @return a new SCA node.
+     */
+    public Node createNode(URL configurationURL) {
+        try {
+            InputStream is = openStream(configurationURL);
+            return createNode(is);
+        } catch (IOException e) {
+            throw new ServiceRuntimeException(e);
+        }
+    }
+
+    /**
+     * Creates a new SCA node from the XML configuration of the node
+     * @param is The input stream that the XML configuration can be read. The stream will be closed
+     * after this call.
+     * @return a new SCA node
+     */
+    public Node createNode(InputStream is) {
+        try {
+            NodeConfiguration configuration = loadConfiguration(is);
+            is.close();
+            return createNode(configuration);
+        } catch (IOException e) {
+            throw new ServiceRuntimeException(e);
+        }
+    }
+
+    /**
+     * Creates a new SCA node.
+     *
+     * @param deploymentCompositeURI the URI of the deployment composite. If the URI is relative, it should
+     * be resolved against the first contribution. Otherwise, the absolute URI is used to load the XML
+     * description of the composite. The deployment composite will be attached to the first contribution.
+     *
+     * @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 Node createNode(String deploymentCompositeURI, Contribution... contributions) {
+        if (contributions == null || contributions.length == 0) {
+            if (deploymentCompositeURI == null || deploymentCompositeURI.indexOf(':') != -1) {
+                throw new ServiceRuntimeException("No SCA contribution is provided or discovered");
+            }
+            // Try to find contributions on the classpath by the composite URI
+            List<String> locations = getContributionLocations(null, deploymentCompositeURI);
+            if (locations.isEmpty()) {
+                throw new ServiceRuntimeException("No SCA contributions are found on the classpath");
+            }
+            contributions = getContributions(locations);
+        }
+        NodeConfiguration configuration = createConfiguration(contributions);
+        if (deploymentCompositeURI != null && configuration.getContributions().size() > 0) {
+            configuration.getContributions().get(0).addDeploymentComposite(createURI(deploymentCompositeURI));
+        }
+        return createNode(configuration);
+    }
+
+    /**
+     * The following methods are used by the node launcher
+     */
+    public final Node createNode(String deploymentCompositeURI, String[] uris, String locations[]) {
+        return createNode(deploymentCompositeURI, getContributions(Arrays.asList(uris), Arrays.asList(locations)));
+    }
+
+    public final Node createNode(String deploymentCompositeURI, String locations[]) {
+        return createNode(deploymentCompositeURI, getContributions(Arrays.asList(locations)));
+    }
+
+    public final Node createNode(Reader deploymentCompositeContent, String[] uris, String locations[]) {
+        return createNode(deploymentCompositeContent, getContributions(Arrays.asList(uris), Arrays.asList(locations)));
+    }
+
+    public final Node createNode(String compositeURI, ClassLoader classLoader) {
+        List<String> locations = ContributionLocationHelper.getContributionLocations(classLoader, compositeURI);
+        return createNode(compositeURI, locations.toArray(new String[locations.size()]));
+    }
+    /**
+     * ------------------- end of methods -----------------
+     */
+
+    /**
+     * Create a new SCA node using the list of SCA contributions
+     * @param contributions
+     * @return
+     */
+    public Node createNode(Contribution... contributions) {
+        NodeConfiguration configuration = createConfiguration(contributions);
+        return createNode(configuration);
+    }
+
+
+    /**
+     * Creates a new SCA node.
+     *
+     * @param compositeContent the XML content of the deployment composite
+     * @param contributions the URI of the contributions that provides the composites and related artifacts
+     * @return a new SCA node.
+     */
+    public Node createNode(InputStream compositeContent, Contribution... contributions) {
+        NodeConfiguration configuration = createConfiguration(contributions);
+        if (compositeContent != null && configuration.getContributions().size() > 0) {
+            configuration.getContributions().get(0).addDeploymentComposite(compositeContent);
+        }
+        return createNode(configuration);
+    }
+
+    /**
+     * Creates a new SCA node.
+     *
+     * @param compositeContent the XML content of the deployment composite
+     * @param contributions the URI of the contributions that provides the composites and related artifacts
+     * @return a new SCA node.
+     */
+    public Node createNode(Reader compositeContent, Contribution... contributions) {
+        NodeConfiguration configuration = createConfiguration(contributions);
+        if (compositeContent != null && configuration.getContributions().size() > 0) {
+            configuration.getContributions().get(0).addDeploymentComposite(compositeContent);
+        }
+        return createNode(configuration);
+    }
+
+    /**
+     * Creates a new SCA node using defaults for the contribution location and deployable composites.
+     * By default, it uses the Thread context classloader to find META-INF/sca-contribution.xml or
+     * META-INF/sca-contribution-generated.xml on the classpath. The locations that contain such resources
+     * are taken as the SCA contributions.
+     *
+     * @return a new SCA node.
+     */
+    public Node createNode() {
+        List<String> locations = new ArrayList<String>();
+        locations.addAll(getContributionLocations(null, SCA_CONTRIBUTION_META));
+        locations.addAll(getContributionLocations(null, SCA_CONTRIBUTION_GENERATED_META));
+        if (locations.isEmpty()) {
+            throw new ServiceRuntimeException("No SCA contributions are found on the classpath");
+        }
+        Contribution[] contributions = getContributions(locations);
+        return createNode(contributions);
+    }
+    
+    private NodeConfiguration createConfiguration(Contribution... contributions) {
+        NodeConfigurationFactory factory = this;
+        NodeConfiguration configuration = factory.createNodeConfiguration();
+        if (contributions != null) {
+            for (Contribution c : contributions) {
+                configuration.addContribution(c.getURI(), c.getLocation());
+            }
+        }
+        return configuration;
+    }
+
+    private Contribution[] getContributions(List<String> locations) {
+        Contribution[] contributions = new Contribution[locations.size()];
+        int index = 0;
+        for (String location : locations) {
+            contributions[index++] = new Contribution(location, location);
+        }
+        return contributions;
+    }
+
+    private Contribution[] getContributions(List<String> uris, List<String> locations) {
+        if (uris.size() != locations.size()) {
+            throw new IllegalArgumentException("The number of URIs does not match the number of locations");
+        }
+        Contribution[] contributions = new Contribution[locations.size()];
+        for (int i = 0, n = locations.size(); i < n; i++) {
+            contributions[i] = new Contribution(uris.get(i), locations.get(i));
+        }
+        return contributions;
+    }
+
+    public void destroy() {
+    }
+
+    /**
+     * Create a new SCA node based on the configuration
+     * @param configuration The configuration of a node
+     * @return The SCA node
+     */
+    public abstract Node createNode(NodeConfiguration configuration);
+
+    /**
+     * Create the node configuration from the XML document
+     * @param configuration The input stream of the XML document
+     * @return The node configuration
+     */
+    public abstract NodeConfiguration loadConfiguration(InputStream xml);
+
+
+}