Branch to experiment with dynamic component interfaces and implementations.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@965346 13f79535-47bb-0310-9956-ffa450edef68

10 files changed, 1179 insertions, 0 deletions

diff --git a/sandbox/sebastien/java/dynamic/modules/host-webapp/LICENSE b/sandbox/sebastien/java/dynamic/modules/host-webapp/LICENSE
new file mode 100644
index 0000000000..8aa906c321
--- /dev/null
+++ b/sandbox/sebastien/java/dynamic/modules/host-webapp/LICENSE
@@ -0,0 +1,205 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
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+   1. Definitions.
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+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
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+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
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+      on behalf of whom a Contribution has been received by Licensor and
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+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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+      (except as stated in this section) patent license to make, have made,
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+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
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+      (d) If the Work includes a "NOTICE" text file as part of its
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+          of the NOTICE file are for informational purposes only and
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+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
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+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
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+      agreed to in writing, Licensor provides the Work (and each
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+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
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+   Unless required by applicable law or agreed to in writing, software
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+
diff --git a/sandbox/sebastien/java/dynamic/modules/host-webapp/META-INF/MANIFEST.MF b/sandbox/sebastien/java/dynamic/modules/host-webapp/META-INF/MANIFEST.MF
new file mode 100644
index 0000000000..871a1b160d
--- /dev/null
+++ b/sandbox/sebastien/java/dynamic/modules/host-webapp/META-INF/MANIFEST.MF
@@ -0,0 +1,23 @@
+Manifest-Version: 1.0

+Export-Package: org.apache.tuscany.sca.host.webapp;version="2.0.0";

+ uses:="javax.servlet,org.apache.tuscany.sca.host.http,org.apache.tuscany.sca.core"

+SCA-Version: 1.1

+Bundle-Name: Apache Tuscany SCA Webapp Host

+Bundle-Vendor: The Apache Software Foundation

+Bundle-Version: 2.0.0

+Bundle-ManifestVersion: 2

+Bundle-License: http://www.apache.org/licenses/LICENSE-2.0.txt

+Bundle-Description: Apache Tuscany SCA Webapp Host

+Import-Package: javax.naming,

+ javax.servlet,

+ javax.servlet.http,

+ org.apache.tuscany.sca.core;version="2.0.0",

+ org.apache.tuscany.sca.host.http;version="2.0.0",

+ org.apache.tuscany.sca.host.webapp;version="2.0.0",

+ org.apache.tuscany.sca.node;version="2.0.0",

+ org.apache.tuscany.sca.node.configuration;version="2.0.0",

+ org.apache.tuscany.sca.node.impl;version="2.0.0",

+ org.oasisopen.sca;version="2.0.0"

+Bundle-SymbolicName: org.apache.tuscany.sca.host.webapp

+Bundle-DocURL: http://www.apache.org/

+Bundle-RequiredExecutionEnvironment: J2SE-1.5,JavaSE-1.6
diff --git a/sandbox/sebastien/java/dynamic/modules/host-webapp/NOTICE b/sandbox/sebastien/java/dynamic/modules/host-webapp/NOTICE
new file mode 100644
index 0000000000..84e148eeef
--- /dev/null
+++ b/sandbox/sebastien/java/dynamic/modules/host-webapp/NOTICE
@@ -0,0 +1,7 @@
+${pom.name}
+Copyright (c) 2005 - 2010 The Apache Software Foundation
+
+This product includes software developed by
+The Apache Software Foundation (http://www.apache.org/).
+
+
diff --git a/sandbox/sebastien/java/dynamic/modules/host-webapp/pom.xml b/sandbox/sebastien/java/dynamic/modules/host-webapp/pom.xml
new file mode 100644
index 0000000000..95a052e299
--- /dev/null
+++ b/sandbox/sebastien/java/dynamic/modules/host-webapp/pom.xml
@@ -0,0 +1,73 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * 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.    
+-->
+<project>
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.apache.tuscany.sca</groupId>
+        <artifactId>tuscany-modules</artifactId>
+        <version>2.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>tuscany-host-webapp</artifactId>
+    <name>Apache Tuscany SCA Webapp Host</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-contribution</artifactId>
+            <version>2.0-SNAPSHOT</version>
+        </dependency>
+        
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-host-http</artifactId>
+            <version>2.0-SNAPSHOT</version>
+        </dependency>
+       
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-node-api</artifactId>
+            <version>2.0-SNAPSHOT</version>
+        </dependency>
+                
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-node-impl</artifactId>
+            <version>2.0-SNAPSHOT</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-implementation-java-runtime</artifactId>
+            <version>2.0-SNAPSHOT</version>
+            <scope>runtime</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>servlet-api</artifactId>
+            <version>2.5</version>
+            <scope>provided</scope>
+        </dependency>
+
+    </dependencies>
+
+</project>
diff --git a/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/TuscanyContextListener.java b/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/TuscanyContextListener.java
new file mode 100644
index 0000000000..45c1bbf3da
--- /dev/null
+++ b/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/TuscanyContextListener.java
@@ -0,0 +1,59 @@
+/*
+ * 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.host.webapp;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import javax.servlet.ServletContextEvent;
+import javax.servlet.ServletContextListener;
+
+/**
+ * A ServletContextListener to create and close the SCADomain
+ * when the webapp is initialized or destroyed.
+ */
+public class TuscanyContextListener implements ServletContextListener {
+    private final Logger logger = Logger.getLogger(TuscanyContextListener.class.getName());
+    private boolean inited;
+
+    public void contextInitialized(ServletContextEvent event) {
+        logger.info(event.getServletContext().getServletContextName() + " is starting.");
+        try {
+            WebAppHelper.init(event.getServletContext());
+        } catch (Throwable e) {
+            logger.log(Level.SEVERE, e.getMessage(), e);
+        }
+        inited = true;
+    }
+
+    public void contextDestroyed(ServletContextEvent event) {
+        logger.info(event.getServletContext().getServletContextName() + " is stopping.");
+        if (!inited) {
+            return;
+        }
+        try {
+            WebAppHelper.stop(event.getServletContext());
+        } catch (Throwable e) {
+            logger.log(Level.SEVERE, e.getMessage(), e);
+        }
+        inited = false;
+    }
+
+}
diff --git a/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/TuscanyServletFilter.java b/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/TuscanyServletFilter.java
new file mode 100644
index 0000000000..a12466a9fd
--- /dev/null
+++ b/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/TuscanyServletFilter.java
@@ -0,0 +1,109 @@
+/*
+ * 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.host.webapp;
+
+import java.io.IOException;
+import java.util.Enumeration;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import javax.servlet.Filter;
+import javax.servlet.FilterConfig;
+import javax.servlet.RequestDispatcher;
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+
+import org.apache.tuscany.sca.host.http.ServletHost;
+
+/**
+ * A Servlet filter that forwards service requests to the Servlets registered with
+ * the Tuscany ServletHost.
+ *
+ * @version $Rev$ $Date$
+ */
+public class TuscanyServletFilter implements Filter {
+    private static final long serialVersionUID = 1L;
+    private Logger logger = Logger.getLogger(TuscanyServletFilter.class.getName());
+
+    private transient ServletContext context;
+    private transient ServletHost servletHost;
+
+    public TuscanyServletFilter() {
+        super();
+    }
+
+    public void init(final FilterConfig config) throws ServletException {
+        try {
+            context = config.getServletContext();
+            for (Enumeration<String> e = config.getInitParameterNames(); e.hasMoreElements();) {
+                String name = e.nextElement();
+                String value = config.getInitParameter(name);
+                context.setAttribute(name, value);
+            }
+            servletHost = WebAppHelper.init(context);
+        } catch (Throwable e) {
+            logger.log(Level.SEVERE, e.getMessage(), e);
+            context.log(e.getMessage(), e);
+            throw new ServletException(e);
+        }
+    }
+
+    public void destroy() {
+        WebAppHelper.stop(context);
+        servletHost = null;
+    }
+
+    public void doFilter(ServletRequest request, ServletResponse response, javax.servlet.FilterChain chain)
+        throws IOException, ServletException {
+        try {
+            // Get the Servlet path
+            HttpServletRequest httpRequest = (HttpServletRequest)request;
+            String path = httpRequest.getPathInfo();
+            if (path == null) {
+                path = httpRequest.getServletPath();
+            }
+            if (path == null) {
+                path = "/";
+            }
+
+            // Get a request dispatcher for the Servlet mapped to that path
+            RequestDispatcher dispatcher = servletHost.getRequestDispatcher(path);
+            if (dispatcher != null) {
+
+                // Let the dispatcher forward the request to the Servlet 
+                dispatcher.forward(request, response);
+
+            } else {
+
+                // Proceed down the filter chain
+                chain.doFilter(request, response);
+
+            }
+        } catch (Throwable e) {
+            logger.log(Level.SEVERE, e.getMessage(), e);
+            context.log(e.getMessage(), e);
+            throw new ServletException(e);
+        }
+    }
+
+}
diff --git a/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/WebAppHelper.java b/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/WebAppHelper.java
new file mode 100644
index 0000000000..41ae426272
--- /dev/null
+++ b/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/WebAppHelper.java
@@ -0,0 +1,230 @@
+/*
+ * 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.host.webapp;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.util.Enumeration;
+
+import javax.servlet.ServletConfig;
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.host.http.ServletHost;
+import org.apache.tuscany.sca.host.http.ServletHostExtensionPoint;
+import org.apache.tuscany.sca.node.Node;
+import org.apache.tuscany.sca.node.NodeFactory;
+import org.apache.tuscany.sca.node.configuration.NodeConfiguration;
+
+public class WebAppHelper {
+    public static final String DOMAIN_NAME_ATTR = "org.apache.tuscany.sca.domain.name";
+    public static final String SCA_NODE_ATTRIBUTE = Node.class.getName();
+    private static NodeFactory factory;
+    private static WebAppServletHost host;
+
+    private static URL getResource(ServletContext servletContext, String location) throws IOException {
+        URI uri = URI.create(location);
+        if (uri.isAbsolute()) {
+            return uri.toURL();
+        } else {
+            String path = location;
+            if (!path.startsWith("/")) {
+                path = "/" + path;
+            }
+            URL url = servletContext.getResource(path);
+            if (url != null && url.getProtocol().equals("jndi")) {
+                //this is Tomcat case, we should use getRealPath
+                File warRootFile = new File(servletContext.getRealPath(path));
+                return warRootFile.toURI().toURL();
+            } else {
+                //this is Jetty case
+                return url;
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private static NodeConfiguration getNodeConfiguration(ServletContext servletContext) throws IOException, URISyntaxException {
+        NodeConfiguration configuration = null;
+        String nodeConfigURI = (String) servletContext.getAttribute("node.configuration");
+        if (nodeConfigURI != null) {
+            URL url = getResource(servletContext, nodeConfigURI);
+            configuration = factory.loadConfiguration(url.openStream(), url);
+        } else {
+            configuration = factory.createNodeConfiguration();
+            Enumeration<String> names = servletContext.getAttributeNames();
+            while (names.hasMoreElements()) {
+                String name = names.nextElement();
+                if (name.startsWith("contribution")) {
+                    String contrib = (String) servletContext.getAttribute(name);
+                    if (contrib != null) {
+                        File f = new File(getResource(servletContext, contrib).toURI());
+                        if (f.isDirectory()) {
+                            for (File n : f.listFiles()) {
+                                configuration.addContribution(n.toURI().toURL());
+                            }
+                        } else {
+                            configuration.addContribution(f.toURI().toURL());
+                        }
+                    }
+                }
+            }
+            
+            if (configuration.getContributions().isEmpty()) {
+                // TODO: Which path should be the default root
+                configuration.addContribution(getResource(servletContext, "/"));
+            }
+            URL composite = getResource(servletContext, "/WEB-INF/web.composite");
+            if (composite != null) {
+                configuration.getContributions().get(0).addDeploymentComposite(composite);
+            }
+            String nodeURI = (String) servletContext.getAttribute("node.uri");
+            if (nodeURI == null) {
+                nodeURI = new File(servletContext.getRealPath("/")).getName();
+            }
+            configuration.setURI(nodeURI);
+            String domainURI = (String) servletContext.getAttribute("domain.uri");
+            if (domainURI != null) {
+                configuration.setDomainURI(domainURI);
+            } else {
+                domainURI = servletContext.getInitParameter("org.apache.tuscany.sca.defaultDomainURI");
+                if (domainURI != null) {
+                    configuration.setDomainURI(getDomainName(domainURI));
+                    configuration.setDomainRegistryURI(domainURI);
+                }
+            }
+        }
+        return configuration;
+    }
+
+    // TODO: Temp for now to get the old samples working till i clean up all the domain uri/name after the ML discussion.
+    private static String getDomainName(String configURI) {
+        String domainName;
+        if (configURI.startsWith("tuscany:vm:")) {
+            domainName = configURI.substring("tuscany:vm:".length());  
+        } else if (configURI.startsWith("tuscany:")) {
+            int i = configURI.indexOf('?');
+            if (i == -1) {
+                domainName = configURI.substring("tuscany:".length());  
+            } else{
+                domainName = configURI.substring("tuscany:".length(), i);  
+            }
+        } else {
+            domainName = configURI;  
+        }
+        return domainName;
+    }
+    
+    public synchronized static ServletHost init(final ServletContext servletContext) {
+        if (host == null) {
+            try {
+                
+                String configValue = servletContext.getInitParameter("org.apache.tuscany.sca.config");
+                if (configValue != null) {
+                    factory = NodeFactory.newInstance(configValue);
+                } else {
+                    factory = NodeFactory.newInstance();
+                }
+                ExtensionPointRegistry registry = factory.getExtensionPointRegistry();
+                ServletHostExtensionPoint servletHosts = registry.getExtensionPoint(ServletHostExtensionPoint.class);
+                servletHosts.setWebApp(true);
+                
+                // TODO: why are the init parameters copied to the attributes?
+                for (Enumeration<?> e = servletContext.getInitParameterNames(); e.hasMoreElements();) {
+                    String name = (String)e.nextElement();
+                    String value = servletContext.getInitParameter(name);
+                    servletContext.setAttribute(name, value);
+                }
+
+                host = getServletHost(servletContext);
+
+            } catch (ServletException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        Node node = (Node)servletContext.getAttribute(SCA_NODE_ATTRIBUTE);
+        if (node == null) {
+            try {
+                node = createAndStartNode(servletContext);
+            } catch (ServletException e) {
+                throw new RuntimeException(e);
+            }
+            servletContext.setAttribute(SCA_NODE_ATTRIBUTE, node);
+        }
+
+        return host;
+    }
+
+    private static WebAppServletHost getServletHost(final ServletContext servletContext) throws ServletException {
+        WebAppServletHost host = getServletHost(factory);
+        host.init(new ServletConfig() {
+            public String getInitParameter(String name) {
+                return servletContext.getInitParameter(name);
+            }
+
+            public Enumeration<?> getInitParameterNames() {
+                return servletContext.getInitParameterNames();
+            }
+
+            public ServletContext getServletContext() {
+                return servletContext;
+            }
+
+            public String getServletName() {
+                return servletContext.getServletContextName();
+            }
+        });
+        return host;
+    }
+
+    private static WebAppServletHost getServletHost(NodeFactory factory) {
+        ExtensionPointRegistry registry = factory.getExtensionPointRegistry();
+        return (WebAppServletHost) org.apache.tuscany.sca.host.http.ServletHostHelper.getServletHost(registry);
+    }
+
+    private static Node createAndStartNode(final ServletContext servletContext) throws ServletException {
+        NodeConfiguration configuration;
+        try {
+            configuration = getNodeConfiguration(servletContext);
+        } catch (IOException e) {
+            throw new ServletException(e);
+        } catch (URISyntaxException e) {
+            throw new ServletException(e);
+        }
+        Node node = factory.createNode(configuration).start();
+        return node;
+    }
+
+    public static void stop(ServletContext servletContext) {
+        Node node = (Node)servletContext.getAttribute(WebAppHelper.SCA_NODE_ATTRIBUTE);
+        if (node != null) {
+            node.stop();
+            servletContext.setAttribute(WebAppHelper.SCA_NODE_ATTRIBUTE, null);
+        }
+    }
+
+    public static NodeFactory getNodeFactory() {
+        return factory;
+    }
+}
diff --git a/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/WebAppRequestDispatcher.java b/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/WebAppRequestDispatcher.java
new file mode 100644
index 0000000000..76cce939ad
--- /dev/null
+++ b/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/WebAppRequestDispatcher.java
@@ -0,0 +1,117 @@
+/*
+ * 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.host.webapp;
+
+import java.io.IOException;
+import java.util.StringTokenizer;
+
+import javax.servlet.RequestDispatcher;
+import javax.servlet.Servlet;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletRequestWrapper;
+
+/**
+ * A Servlet request dispatcher that can be used to delegate requests to a
+ * Servlet registered with the Webapp Servlet host.
+ *
+ * @version $Rev$ $Date$
+ */
+class WebAppRequestDispatcher implements RequestDispatcher {
+    private String servletPath;
+    private Servlet servlet;
+    
+    public WebAppRequestDispatcher(String mapping, Servlet servlet) {
+        if (mapping.endsWith("*")) {
+            mapping = mapping.substring(0, mapping.length()-1);
+        }
+        if (mapping.endsWith("/")) {
+            mapping = mapping.substring(0, mapping.length()-1);
+        }
+        this.servletPath = mapping;
+        this.servlet = servlet;
+    }
+
+    /**
+     * Returns a request wrapper which will return the correct Servlet path
+     * and path info.
+     * 
+     * @param request
+     * @return
+     */
+    private HttpServletRequest createRequestWrapper(ServletRequest request) {
+        HttpServletRequest requestWrapper = new HttpServletRequestWrapper((HttpServletRequest)request) {
+            
+            @Override
+            public String getServletPath() {
+                return servletPath;
+            }
+            
+            @Override
+            public String getPathInfo() {
+                String path = super.getServletPath();
+                if (path.length() == 0) {
+                    path = super.getPathInfo();
+                }
+
+                // TODO: another context path hack, revisit when context path is sorted out
+                path = fiddlePath(path, servletPath);
+
+                return path;
+            }
+        };
+        return requestWrapper;
+    }
+
+    /**
+     * Remove any path suffix thats part of the Servlet context path
+     */
+    protected String fiddlePath(String path, String servletPath) {
+        if (path.startsWith(servletPath)) {
+            return path.substring(servletPath.length());
+        }
+        StringTokenizer st = new StringTokenizer(path, "/");
+        if (st.countTokens() == 1) {
+            return path;
+        }
+        String root = "";
+        while (st.hasMoreTokens()){
+                String s = st.nextToken();
+                if (servletPath.endsWith((root + "/" + s))) {
+                        root += "/" + s;
+                } else {
+                        break;
+                }
+        }
+        String fiddlePath = path.substring(root.length());
+        return fiddlePath;
+    }
+
+    public void forward(ServletRequest request, ServletResponse response) throws ServletException, IOException {
+        servlet.service(createRequestWrapper(request), response);
+    }
+    
+    public void include(ServletRequest request, ServletResponse response) throws ServletException, IOException {
+        servlet.service(createRequestWrapper(request), response);
+    }
+}
+
diff --git a/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/WebAppServletHost.java b/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/WebAppServletHost.java
new file mode 100644
index 0000000000..0c5431a7d8
--- /dev/null
+++ b/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/java/org/apache/tuscany/sca/host/webapp/WebAppServletHost.java
@@ -0,0 +1,338 @@
+/*
+ * 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.host.webapp;
+
+import java.lang.reflect.Method;
+import java.net.InetAddress;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URL;
+import java.net.UnknownHostException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.logging.Logger;
+
+import javax.servlet.RequestDispatcher;
+import javax.servlet.Servlet;
+import javax.servlet.ServletConfig;
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+
+import org.apache.tuscany.sca.host.http.SecurityContext;
+import org.apache.tuscany.sca.host.http.ServletHost;
+import org.apache.tuscany.sca.host.http.ServletMappingException;
+import org.apache.tuscany.sca.node.Node;
+
+/**
+ * ServletHost implementation for use in a webapp environment.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class WebAppServletHost implements ServletHost {
+    private static final Logger logger = Logger.getLogger(WebAppServletHost.class.getName());
+
+    public static final String SCA_NODE_ATTRIBUTE = Node.class.getName();
+
+    private Map<String, Servlet> servlets;
+    private String contextPath = "/";
+    private int defaultPortNumber = 8080;
+    private String contributionRoot;
+
+    private ServletConfig servletConfig;
+    private ServletContext servletContext;
+    private Map<String, Object> tempAttributes = new HashMap<String, Object>();
+
+    public WebAppServletHost() {
+        servlets = new HashMap<String, Servlet>();
+    }
+
+    public void setDefaultPort(int port) {
+        defaultPortNumber = port;
+    }
+
+    public int getDefaultPort() {
+        return defaultPortNumber;
+    }
+    
+    public String getName() {
+        return "webapp";
+    }
+    
+    public String addServletMapping(String suri, Servlet servlet) throws ServletMappingException {
+        return addServletMapping(suri, servlet, null);
+    }    
+
+    public String addServletMapping(String suri, Servlet servlet, SecurityContext securityContext) throws ServletMappingException {
+        URI pathURI = URI.create(suri);
+
+        // Make sure that the path starts with a /
+        suri = pathURI.getPath();
+        if (!suri.startsWith("/")) {
+            suri = '/' + suri;
+        }
+
+        // String relativeURI = suri;
+        if (!suri.startsWith(contextPath + "/")) {
+            suri = contextPath + suri;
+        } 
+
+        if (!servlets.values().contains(servlet)) {
+            // The same servlet can be registred more than once
+            try {
+                servlet.init(servletConfig);
+            } catch (ServletException e) {
+                throw new ServletMappingException(e);
+            }
+        }
+        
+        // In a webapp just use the given path and ignore the host and port
+        // as they are fixed by the Web container
+        servlets.put(suri, servlet);
+
+        URL url = getURLMapping(suri, securityContext);
+        logger.info("Added Servlet mapping: " + url);
+        return url.toString();
+    }
+
+    public Servlet removeServletMapping(String suri) throws ServletMappingException {
+        URI pathURI = URI.create(suri);
+
+        // Make sure that the path starts with a /
+        suri = pathURI.getPath();
+        if (!suri.startsWith("/")) {
+            suri = '/' + suri;
+        }
+
+        if (!suri.startsWith(contextPath)) {
+            suri = contextPath + suri;
+        }
+
+        // In a webapp just use the given path and ignore the host and port
+        // as they are fixed by the Web container
+        Servlet servlet = servlets.remove(suri);
+        /*
+        if (servlet != null) {
+            servlet.destroy();
+        }
+        */
+        return servlet;
+    }
+
+    public Servlet getServletMapping(String suri) throws ServletMappingException {
+        if (!suri.startsWith("/")) {
+            suri = '/' + suri;
+        }
+
+        if (!suri.startsWith(contextPath)) {
+            suri = contextPath + suri;
+        }
+
+        // Get the Servlet mapped to the given path
+        Servlet servlet = servlets.get(suri);
+        return servlet;
+    }
+
+    public URL getURLMapping(String suri, SecurityContext securityContext) throws ServletMappingException {
+        URI uri = URI.create(suri);
+
+        // Get the URI scheme and port
+        String scheme = uri.getScheme();
+        if (scheme == null) {
+            scheme = "http";
+        }
+        int portNumber = uri.getPort();
+        if (portNumber == -1) {
+            portNumber = defaultPortNumber;
+        }
+
+        // Get the host
+        String host = uri.getHost();
+        if (host == null) {
+            try {
+                host = InetAddress.getLocalHost().getHostName();
+            } catch (UnknownHostException e) {
+                host = "localhost";
+            }
+        }
+
+        // Construct the URL
+        String path = uri.getPath();
+        if (!path.startsWith("/")) {
+            path = '/' + path;
+        }
+
+        if (contextPath != null && !path.startsWith(contextPath)) {
+            path = contextPath + path;
+        }
+
+        URL url;
+        try {
+            url = new URL(scheme, host, portNumber, path);
+        } catch (MalformedURLException e) {
+            throw new ServletMappingException(e);
+        }
+        return url;
+    }
+
+    public RequestDispatcher getRequestDispatcher(String suri) throws ServletMappingException {
+
+        // Make sure that the path starts with a /
+        if (!suri.startsWith("/")) {
+            suri = '/' + suri;
+        }
+
+        if (contextPath != null && contextPath.length() > 0 && !"/".equals(contextPath)) {
+            suri = contextPath + suri;
+        }
+
+        // Get the Servlet mapped to the given path
+        Servlet servlet = servlets.get(suri);
+        if (servlet != null) {
+            return new WebAppRequestDispatcher(suri, servlet);
+        }
+
+        for (Map.Entry<String, Servlet> entry : servlets.entrySet()) {
+            String servletPath = entry.getKey();
+            if (servletPath.endsWith("*")) {
+                servletPath = servletPath.substring(0, servletPath.length() - 1);
+                if (suri.startsWith(servletPath)) {
+                    // entry key is contextPath/servletPath, WebAppRequestDispatcher only wants servletPath
+                    return new WebAppRequestDispatcher(entry.getKey().substring(contextPath.length()), entry.getValue());
+                } else {
+                    if ((suri + "/").startsWith(servletPath)) {
+                        return new WebAppRequestDispatcher(entry.getKey().substring(contextPath.length()), entry.getValue());
+                    }
+                }
+            }
+        }
+
+        // No Servlet found
+        return null;
+    }
+
+    public void init(ServletConfig config) throws ServletException {
+        this.servletConfig = config;
+        servletContext = config.getServletContext();
+        
+        for (String name : tempAttributes.keySet()) {
+            servletContext.setAttribute(name, tempAttributes.get(name));
+        }
+        
+        // WebAppHelper.init(servletContext);
+        
+        initContextPath(config);
+
+        // Initialize the registered Servlets
+        for (Servlet servlet : servlets.values()) {
+            servlet.init(config);
+        }
+        
+    }
+    
+    /**
+     * Initializes the contextPath
+     * The 2.5 Servlet API has a getter for this, for pre 2.5 Servlet
+     * containers use an init parameter.
+     */
+    @SuppressWarnings("unchecked")
+    public void initContextPath(ServletConfig config) {
+        
+        String oldContextPath = contextPath;
+        
+        if (Collections.list(config.getInitParameterNames()).contains("contextPath")) {
+            contextPath = config.getInitParameter("contextPath");
+        } else {
+            // The getContextPath() is introduced since Servlet 2.5
+            ServletContext context = config.getServletContext();
+            try {
+                // Try to get the method anyway since some ServletContext impl has this method even before 2.5
+                Method m = context.getClass().getMethod("getContextPath", new Class[] {});
+                contextPath = (String)m.invoke(context, new Object[] {});
+            } catch (Exception e) {
+                logger.warning("Servlet level is: " + context.getMajorVersion() + "." + context.getMinorVersion());
+                throw new IllegalStateException("'contextPath' init parameter must be set for pre-2.5 servlet container");
+            }
+        }
+
+        logger.info("ContextPath: " + contextPath);
+
+        // if the context path changes after some servlets have been registered then
+        // need to reregister them (this can happen if extensions start before webapp init)
+        if (!oldContextPath.endsWith(contextPath)) {
+            List<String> oldServletURIs = new ArrayList<String>();
+            for (String oldServletURI : servlets.keySet()) {
+                if (oldServletURI.startsWith(oldContextPath)) {
+                    if (!oldServletURI.startsWith(contextPath)) {
+                        oldServletURIs.add(oldServletURI);
+                    }
+                }
+            }
+            for (String oldURI : oldServletURIs) {
+                String ns = contextPath + "/" + oldURI.substring(oldContextPath.length());
+                servlets.put(ns, servlets.remove(oldURI));
+            }
+        }
+        
+    }    
+    
+    void destroy() {
+
+        // Destroy the registered Servlets
+        for (Servlet servlet : servlets.values()) {
+            servlet.destroy();
+        }
+
+        // Close the SCA domain
+        WebAppHelper.stop(servletContext);
+    }
+
+    public String getContextPath() {
+        return contextPath;
+    }
+
+    public void setContextPath(String path) {
+    }
+
+    /**
+     * TODO: How context paths work is still up in the air so for now
+     *    this hacks in a path that gets some samples working
+     *    can't use setContextPath as NodeImpl calls that later
+     */
+    public void setContextPath2(String path) {
+        if (path != null && path.length() > 0) {
+            this.contextPath = path;
+        }
+    }
+
+    public String getContributionRoot() {
+        return contributionRoot;
+    }
+
+    public void setAttribute(String name, Object value) {
+        if (servletContext != null) {
+            servletContext.setAttribute(name, value);
+        } else {
+            tempAttributes.put(name, value);
+        }
+    }
+}
diff --git a/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/resources/META-INF/services/org.apache.tuscany.sca.host.http.ServletHost b/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/resources/META-INF/services/org.apache.tuscany.sca.host.http.ServletHost
new file mode 100644
index 0000000000..de0d15435c
--- /dev/null
+++ b/sandbox/sebastien/java/dynamic/modules/host-webapp/src/main/resources/META-INF/services/org.apache.tuscany.sca.host.http.ServletHost
@@ -0,0 +1,18 @@
+# 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.

+# Implementation class for the ServletHost

+org.apache.tuscany.sca.host.webapp.WebAppServletHost;name=webapp,ranking=0