Sandbox to experiment with different ways to embed the runtime.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@990620 13f79535-47bb-0310-9956-ffa450edef68

12 files changed, 1091 insertions, 0 deletions

diff --git a/sandbox/sebastien/java/embed/modules/extensibility-equinox/LICENSE b/sandbox/sebastien/java/embed/modules/extensibility-equinox/LICENSE
new file mode 100644
index 0000000000..6e529a25c4
--- /dev/null
+++ b/sandbox/sebastien/java/embed/modules/extensibility-equinox/LICENSE
@@ -0,0 +1,205 @@
+

+                                 Apache License

+                           Version 2.0, January 2004

+                        http://www.apache.org/licenses/

+

+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

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+      represent, as a whole, an original work of authorship. For the purposes

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+      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

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+      designated in writing by the copyright owner as "Not a Contribution."

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+      on behalf of whom a Contribution has been received by Licensor and

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+      this License, each Contributor hereby grants to You a perpetual,

+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable

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+      Work and such Derivative Works in Source or Object form.

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+      this License, each Contributor hereby grants to You a perpetual,

+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable

+      (except as stated in this section) patent license to make, have made,

+      use, offer to sell, sell, import, and otherwise transfer the Work,

+      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

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+

+   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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+      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

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+      unless required by applicable law (such as deliberate and grossly

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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/embed/modules/extensibility-equinox/META-INF/MANIFEST.MF b/sandbox/sebastien/java/embed/modules/extensibility-equinox/META-INF/MANIFEST.MF
new file mode 100644
index 0000000000..7ece048182
--- /dev/null
+++ b/sandbox/sebastien/java/embed/modules/extensibility-equinox/META-INF/MANIFEST.MF
@@ -0,0 +1,30 @@
+Manifest-Version: 1.0

+Private-Package: org.apache.tuscany.sca.extensibility.equinox;version=

+ "2.0.0"

+Bundle-ActivationPolicy: lazy

+SCA-Version: 1.1

+Bundle-Name: Apache Tuscany SCA Extensibility for Eclipse Equinox

+Bundle-Vendor: The Apache Software Foundation

+Eclipse-LazyStart: true

+Bundle-Version: 2.0.0

+Bundle-Activator: org.apache.tuscany.sca.extensibility.equinox.Equinox

+ ServiceDiscoveryActivator

+Bundle-ManifestVersion: 2

+Bundle-Description: Apache Tuscany SCA Extensibility for Eclipse Equin

+ ox

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

+Import-Package: org.apache.tuscany.sca.core;version="2.0.0",

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

+ org.osgi.framework;version="1.4",

+ org.osgi.framework.launch;version="1.0.0";resolution:=optional,

+ org.osgi.util.tracker;version="1.4.2"

+Tuscany-Comment2: The system bundle exports javax.transaction* packages that only

+ contains a subset of the classes

+DynamicImport-Package: org.apache.tuscany.sca.extensibility.equinox,

+ javax.transaction;version="1.1",

+ javax.transaction.xa;version="1.1",

+ * 

+Bundle-SymbolicName: org.apache.tuscany.sca.extensibility.equinox

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

+Bundle-RequiredExecutionEnvironment: J2SE-1.5,JavaSE-1.6
+Export-Package: org.apache.tuscany.sca.extensibility.equinox;version="2.0.0"

diff --git a/sandbox/sebastien/java/embed/modules/extensibility-equinox/NOTICE b/sandbox/sebastien/java/embed/modules/extensibility-equinox/NOTICE
new file mode 100644
index 0000000000..a67cd7c175
--- /dev/null
+++ b/sandbox/sebastien/java/embed/modules/extensibility-equinox/NOTICE
@@ -0,0 +1,5 @@
+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/embed/modules/extensibility-equinox/pom.xml b/sandbox/sebastien/java/embed/modules/extensibility-equinox/pom.xml
new file mode 100644
index 0000000000..6643dd01d6
--- /dev/null
+++ b/sandbox/sebastien/java/embed/modules/extensibility-equinox/pom.xml
@@ -0,0 +1,66 @@
+<?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-extensibility-equinox</artifactId>
+    <name>Apache Tuscany SCA Extensibility for Eclipse Equinox</name>
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-extensibility</artifactId>
+            <version>2.0-SNAPSHOT</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.eclipse</groupId>
+            <artifactId>osgi</artifactId>
+            <version>3.5.0-v20090520</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-dependency-plugin</artifactId>
+                <version>2.0</version>
+                <executions>
+                    <execution>
+                        <id>copy-dependencies</id>
+                        <phase>process-test-resources</phase>
+                        <goals>
+                            <goal>copy-dependencies</goal>
+                        </goals>
+                        <configuration>
+                            <outputDirectory>${project.build.directory}/bundles</outputDirectory>
+                            <excludeArtifactIds>osgi,junit,easymock,tuscany-extensibility</excludeArtifactIds>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>
diff --git a/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java
new file mode 100644
index 0000000000..6736f9cfb4
--- /dev/null
+++ b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java
@@ -0,0 +1,326 @@
+/*
+ * 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.extensibility.equinox;
+
+import java.io.IOException;
+import java.net.URL;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.Collection;
+import java.util.Enumeration;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDeclarationParser;
+import org.apache.tuscany.sca.extensibility.ServiceDiscoverer;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.BundleEvent;
+import org.osgi.framework.BundleException;
+import org.osgi.framework.Constants;
+import org.osgi.framework.Version;
+import org.osgi.util.tracker.BundleTracker;
+
+/**
+ * A ServiceDiscoverer that find META-INF/services/... in installed bundles
+ *
+ * @version $Rev$ $Date$
+ */
+public class EquinoxServiceDiscoverer implements ServiceDiscoverer {
+    private static final Logger logger = Logger.getLogger(EquinoxServiceDiscoverer.class.getName());
+
+    private BundleContext context;
+    private Version version;
+    private BundleTracker bundleTracker;
+
+    public EquinoxServiceDiscoverer(BundleContext context) {
+        this.context = context;
+        Bundle bundle = context.getBundle();
+        this.version = getSCAVersion(bundle);
+        if (this.version.equals(Version.emptyVersion)) {
+            this.version = Version.parseVersion("1.1");
+        }
+        bundleTracker = new ActiveBundleTracker(context);
+        bundleTracker.open();
+    }
+    
+    public void stop() {
+        bundleTracker.close();
+    }
+
+    private Version getSCAVersion(Bundle bundle) {
+        String header = (String)bundle.getHeaders().get("SCA-Version");
+        return Version.parseVersion(header);
+    }
+    
+    public static class ActiveBundleTracker extends BundleTracker {
+
+        /**
+         * @param context
+         * @param stateMask
+         * @param customizer
+         */
+        public ActiveBundleTracker(BundleContext context) {
+            super(context, Bundle.RESOLVED | Bundle.ACTIVE | Bundle.STARTING, null);
+        }
+
+        @Override
+        public Object addingBundle(Bundle bundle, BundleEvent event) {
+            if (event != null && event.getType() == BundleEvent.STOPPED) {
+                return null;
+            }
+            return super.addingBundle(bundle, event);
+        }
+
+    }
+
+
+    public static class ServiceDeclarationImpl implements ServiceDeclaration {
+        private Bundle bundle;
+        private URL url;
+        private String className;
+        private Class<?> javaClass;
+        private Map<String, String> attributes;
+
+        public ServiceDeclarationImpl(Bundle bundle, URL url, String className, Map<String, String> attributes) {
+            super();
+            this.bundle = bundle;
+            this.url = url;
+            this.className = className;
+            this.attributes = attributes;
+        }
+
+        public Map<String, String> getAttributes() {
+            return attributes;
+        }
+
+        public String getClassName() {
+            return className;
+        }
+
+        public Class<?> loadClass() throws ClassNotFoundException {
+            if (className == null) {
+                return null;
+            }
+            if (javaClass == null) {
+                javaClass = loadClass(className);
+            }
+            return javaClass;
+        }
+
+        public Class<?> loadClass(String className) throws ClassNotFoundException {
+            return bundle.loadClass(className);
+        }
+
+        public URL getLocation() {
+            return url;
+        }
+
+        public URL getResource(final String name) {
+            return AccessController.doPrivileged(new PrivilegedAction<URL>() {
+                public URL run() {
+                    return bundle.getResource(name);
+                }
+            });
+        }
+
+        @Override
+        public String toString() {
+            StringBuffer sb = new StringBuffer();
+            sb.append("Bundle: ").append(EquinoxServiceDiscoverer.toString(bundle));
+            sb.append(" Resource: ").append(url);
+            sb.append(" Attributes: ").append(attributes);
+            return sb.toString();
+        }
+
+        public Bundle getBundle() {
+            return bundle;
+        }
+
+        public boolean isAssignableTo(Class<?> serviceType) {
+            try {
+                loadClass();
+            } catch (ClassNotFoundException e) {
+                // Ignore 
+            }
+            return (javaClass != null && serviceType.isAssignableFrom(javaClass));
+        }
+
+    }
+
+    /**
+     * Empty static method to trigger the activation of this bundle.
+     */
+    public static void init() {
+    }
+
+    private static String toString(Bundle b) {
+        StringBuffer sb = new StringBuffer();
+        sb.append(b.getBundleId()).append(" ").append(b.getSymbolicName());
+        int s = b.getState();
+        if ((s & Bundle.UNINSTALLED) != 0) {
+            sb.append(" UNINSTALLED");
+        }
+        if ((s & Bundle.INSTALLED) != 0) {
+            sb.append(" INSTALLED");
+        }
+        if ((s & Bundle.RESOLVED) != 0) {
+            sb.append(" RESOLVED");
+        }
+        if ((s & Bundle.STARTING) != 0) {
+            sb.append(" STARTING");
+        }
+        if ((s & Bundle.STOPPING) != 0) {
+            sb.append(" STOPPING");
+        }
+        if ((s & Bundle.ACTIVE) != 0) {
+            sb.append(" ACTIVE");
+        }
+        return sb.toString();
+
+    }
+
+
+    public ServiceDeclaration getServiceDeclaration(String name) throws IOException {
+        Collection<ServiceDeclaration> declarations = getServiceDeclarations(name);
+        if (declarations.isEmpty()) {
+            return null;
+        } else {
+            return declarations.iterator().next();
+        }
+    }
+    
+    private boolean isProviderBundle(Bundle bundle, boolean isTuscanyService) {
+        if (bundle.getBundleId() == 0 || bundle.getSymbolicName().startsWith("1.x-osgi-bundle")
+            || bundle.getHeaders().get(Constants.FRAGMENT_HOST) != null) {
+            // Skip system bundle as it has access to the application classloader
+            // Skip the 1.x runtime bundle as this has 1.x services in it
+            //    For testing running 1.x and 2.x in same VM. 
+            //    Don't know what final form will be yet.
+            // Skip bundle fragments too
+            return false;
+        }
+        // FIXME: [rfeng] What bundles should be searched? ACTIVE and STARTING?
+        if ((bundle.getState() & Bundle.UNINSTALLED) != 0) {
+            return false;
+        }
+        if (isTuscanyService) {
+            Version scaVersion = getSCAVersion(bundle);
+            return scaVersion.compareTo(version) == 0;
+        }
+        return true;
+    }
+    
+    protected Collection<Bundle> getBundles(boolean isTuscanyService) {
+        // return bundles.keySet();
+        Set<Bundle> set = new HashSet<Bundle>();
+        for (Bundle b : context.getBundles()) {
+            if (isProviderBundle(b, isTuscanyService)) {
+                set.add(b);
+            }
+            /*
+            else {
+                if (b.getBundleId() != 0 && isTuscanyService) {
+                    logger.warning("Bundle is skipped for service discovery: " + toString(b));
+                }
+            }
+            */
+        }
+        return set;
+    }
+
+    public Collection<ServiceDeclaration> getServiceDeclarations(String serviceName) throws IOException {
+        boolean debug = logger.isLoggable(Level.FINE);
+        Collection<ServiceDeclaration> descriptors = new HashSet<ServiceDeclaration>();
+
+        // http://java.sun.com/j2se/1.5.0/docs/api/javax/xml/xpath/XPathFactory.html
+        boolean isPropertyFile = "javax.xml.xpath.XPathFactory".equals(serviceName);
+        boolean isTuscanyService = serviceName.startsWith("org.apache.tuscany.sca.");
+        serviceName = "META-INF/services/" + serviceName;
+
+        Set<URL> visited = new HashSet<URL>();
+        //System.out.println(">>>> getServiceDeclarations()");
+        for (Bundle bundle : getBundles(isTuscanyService)) {
+//            if (!isProviderBundle(bundle)) {
+//                continue;
+//            }
+            Enumeration<URL> urls = null;
+            try {
+                // Use getResources to find resources on the classpath of the bundle
+                // Please note there are cases that getResources will return null even
+                // the bundle containing such entries:
+                // 1. There is a match on Import-Package or DynamicImport-Package, and another
+                // bundle exports the resource package, there is a possiblity that it doesn't
+                // find the containing entry
+                // 2. The bundle cannot be resolved, then getResources will return null
+                urls = bundle.getResources(serviceName);
+                if (urls == null) {
+                    URL entry = bundle.getEntry(serviceName);
+                    if (entry != null) {
+                        logger.warning("Unresolved resource " + serviceName + " found in " + toString(bundle));
+                        try {
+                            bundle.start();
+                        } catch (BundleException e) {
+                            logger.log(Level.SEVERE, e.getMessage(), e);
+                        }
+                        // urls = Collections.enumeration(Arrays.asList(entry));
+                    }
+                }
+            } catch (IOException e) {
+                logger.log(Level.SEVERE, e.getMessage(), e);
+            }
+            if (urls == null) {
+                continue;
+            }
+            while (urls.hasMoreElements()) {
+                final URL url = urls.nextElement();
+
+                if (!visited.add(url)) {
+                    // The URL has already been processed
+                    continue;
+                }
+
+                if (debug) {
+                    logger.fine("Reading service provider file: " + url.toExternalForm());
+                }
+                try {
+                    for (Map<String, String> attributes : ServiceDeclarationParser.load(url, isPropertyFile)) {
+                        String className = attributes.get("class");
+                        ServiceDeclarationImpl descriptor = new ServiceDeclarationImpl(bundle, url, className, attributes);
+                        descriptors.add(descriptor);
+                    }
+                } catch (IOException e) {
+                    logger.log(Level.SEVERE, e.getMessage(), e);
+                }
+            }
+        }
+        return descriptors;
+    }
+    
+    public ClassLoader getContextClassLoader() {
+        // Get the bundle classloader for the extensibility bundle that has DynamicImport-Package *
+        return getClass().getClassLoader();
+    }
+
+}
diff --git a/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoveryActivator.java b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoveryActivator.java
new file mode 100644
index 0000000000..14ad6670a8
--- /dev/null
+++ b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoveryActivator.java
@@ -0,0 +1,49 @@
+/*
+ * 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.extensibility.equinox;
+
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+import org.osgi.framework.BundleActivator;
+import org.osgi.framework.BundleContext;
+
+/**
+ * The Bundle Activator that creates the Equinox-based service discoverer 
+ *
+ * @version $Rev$ $Date$
+ */
+public class EquinoxServiceDiscoveryActivator implements BundleActivator {
+    // private static final Logger logger = Logger.getLogger(EquinoxServiceDiscoveryActivator.class.getName());
+    private EquinoxServiceDiscoverer discoverer;
+
+    public void start(BundleContext context) throws Exception {
+        discoverer = new EquinoxServiceDiscoverer(context);
+        ServiceDiscovery.getInstance().setServiceDiscoverer(discoverer);
+        // logger.info("Equinox-based service discoverer is now configured.");
+    }
+
+    public void stop(BundleContext context) throws Exception {
+        ServiceDiscovery.getInstance().setServiceDiscoverer(null);
+        if (discoverer != null) {
+            discoverer.stop();
+            discoverer = null;
+        }
+    }
+
+}
diff --git a/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java
new file mode 100644
index 0000000000..4b5fffff01
--- /dev/null
+++ b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java
@@ -0,0 +1,106 @@
+/*
+ * 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.extensibility.equinox;
+
+import java.util.Dictionary;
+import java.util.Hashtable;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.BundleException;
+import org.osgi.framework.ServiceReference;
+import org.osgi.framework.ServiceRegistration;
+
+/**
+ * OSGi ServiceRegistry based extension point registry
+ */
+public class OSGiExtensionPointRegistry extends DefaultExtensionPointRegistry {
+    private Map<Class<?>, ServiceRegistration> registrations = new ConcurrentHashMap<Class<?>, ServiceRegistration>();
+    private BundleContext bundleContext;
+
+    public OSGiExtensionPointRegistry(BundleContext bundleContext) {
+        super(ServiceDiscovery.getInstance(new EquinoxServiceDiscoverer(bundleContext)));
+        this.bundleContext = bundleContext;
+    }
+
+    @Override
+    protected void registerExtensionPoint(Class<?> extensionPointType,
+                                          Object extensionPoint,
+                                          ServiceDeclaration declaration) {
+        BundleContext context = bundleContext;
+        if (declaration instanceof EquinoxServiceDiscoverer.ServiceDeclarationImpl) {
+            EquinoxServiceDiscoverer.ServiceDeclarationImpl declarationImpl =
+                (EquinoxServiceDiscoverer.ServiceDeclarationImpl)declaration;
+            Bundle bundle = declarationImpl.getBundle();
+            /**
+             * If this bundle is not in the STARTING, ACTIVE, or STOPPING states or this bundle
+             * is a fragment bundle, then this bundle has no valid BundleContext. This method will
+             * return null if this bundle has no valid BundleContext
+             */
+            if ((bundle.getState() & (Bundle.ACTIVE | Bundle.STARTING)) == 0) {
+                try {
+                    bundle.start();
+                } catch (BundleException e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            context = bundle.getBundleContext();
+        }
+        Dictionary<Object, Object> props = new Hashtable<Object, Object>();
+        ServiceRegistration registration = context.registerService(extensionPointType.getName(), extensionPoint, props);
+        registrations.put(extensionPointType, registration);
+        super.registerExtensionPoint(extensionPointType, extensionPoint, declaration);
+    }
+
+    @Override
+    protected void unregisterExtensionPoint(Class<?> i) {
+        ServiceRegistration registration = registrations.remove(i);
+        if (registration != null) {
+            try {
+                registration.unregister();
+            } catch (IllegalStateException e) {
+                // The service has been unregistered, ignore it
+            }        
+        }
+        super.unregisterExtensionPoint(i);
+    }
+
+    @Override
+    public synchronized void stop() {
+        for (ServiceRegistration reg : registrations.values()) {
+            try {
+                ServiceReference ref = reg.getReference();
+                if (ref != null) {
+                    reg.unregister();
+                }
+            } catch (IllegalStateException e) {
+                // Ignore it, the service has been unregistered when the owning bundle stops
+            }
+        }
+        registrations.clear();
+        super.stop();
+    }
+
+}
diff --git a/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxHostTestCase.java b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxHostTestCase.java
new file mode 100644
index 0000000000..aa9cd50abc
--- /dev/null
+++ b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxHostTestCase.java
@@ -0,0 +1,95 @@
+/*
+ * 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.extensibility.equinox;
+
+import java.util.Dictionary;
+import java.util.Enumeration;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleContext;
+
+/**
+ * Test start/stop the Equinox runtime.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class EquinoxHostTestCase {
+    @Test
+    public void testStartThenStop() {
+        TestEquinoxHost host = new TestEquinoxHost();
+        BundleContext context = host.start();
+        Assert.assertNotNull(context);
+        for (Bundle b : context.getBundles()) {
+            System.out.println(toString(b, false));
+        }
+        host.stop();
+    }
+
+    @Test
+    public void testStartTwice() {
+        TestEquinoxHost host = new TestEquinoxHost();
+        host.start();
+        try {
+            host.start();
+            Assert.fail();
+        } catch (IllegalStateException e) {
+            Assert.assertTrue(IllegalStateException.class.isInstance(e.getCause()));
+        } finally {
+            host.stop();
+        }
+    }
+
+    public static String toString(Bundle b, boolean verbose) {
+        StringBuffer sb = new StringBuffer();
+        sb.append(b.getBundleId()).append(" ").append(b.getSymbolicName());
+        int s = b.getState();
+        if ((s & Bundle.UNINSTALLED) != 0) {
+            sb.append(" UNINSTALLED");
+        }
+        if ((s & Bundle.INSTALLED) != 0) {
+            sb.append(" INSTALLED");
+        }
+        if ((s & Bundle.RESOLVED) != 0) {
+            sb.append(" RESOLVED");
+        }
+        if ((s & Bundle.STARTING) != 0) {
+            sb.append(" STARTING");
+        }
+        if ((s & Bundle.STOPPING) != 0) {
+            sb.append(" STOPPING");
+        }
+        if ((s & Bundle.ACTIVE) != 0) {
+            sb.append(" ACTIVE");
+        }
+
+        sb.append(" ").append(b.getLocation());
+        if (verbose) {
+            Dictionary<Object, Object> dict = b.getHeaders();
+            Enumeration<Object> keys = dict.keys();
+            while (keys.hasMoreElements()) {
+                Object key = keys.nextElement();
+                sb.append(" ").append(key).append("=").append(dict.get(key));
+            }
+        }
+        return sb.toString();
+    }
+}
diff --git a/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscovererTestCase.java b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscovererTestCase.java
new file mode 100644
index 0000000000..0b0e46fd15
--- /dev/null
+++ b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscovererTestCase.java
@@ -0,0 +1,132 @@
+/*
+ * 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.extensibility.equinox;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Collection;
+
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleContext;
+
+/**
+ * Test the Equinox service discoverer.
+ *
+ * @version $Rev$ $Date$
+ */
+public class EquinoxServiceDiscovererTestCase {
+    private static EquinoxServiceDiscoverer discoverer;
+    private static Bundle testBundle1;
+    private static Bundle testBundle2;
+    private static TestEquinoxHost host;
+
+    private static String getState(Bundle b) {
+        StringBuffer sb = new StringBuffer();
+        int s = b.getState();
+        if ((s & Bundle.UNINSTALLED) != 0) {
+            sb.append("UNINSTALLED ");
+        }
+        if ((s & Bundle.INSTALLED) != 0) {
+            sb.append("INSTALLED ");
+        }
+        if ((s & Bundle.RESOLVED) != 0) {
+            sb.append("RESOLVED ");
+        }
+        if ((s & Bundle.STARTING) != 0) {
+            sb.append("STARTING ");
+        }
+        if ((s & Bundle.STOPPING) != 0) {
+            sb.append("STOPPING ");
+        }
+        if ((s & Bundle.ACTIVE) != 0) {
+            sb.append("ACTIVE ");
+        }
+        return sb.toString();
+
+    }
+
+    /**
+     * @throws java.lang.Exception
+     */
+    @BeforeClass
+    public static void setUpBeforeClass() throws Exception {
+        host = new TestEquinoxHost();
+        BundleContext context = host.start();
+
+        InputStream is = EquinoxServiceDiscovererTestCase.class.getResourceAsStream("/test-bundle-v1.jar");
+        testBundle1 = context.installBundle("test-bundle-v1", is);
+        is.close();
+        
+        is = EquinoxServiceDiscovererTestCase.class.getResourceAsStream("/test-bundle-v2.jar");
+        testBundle2 = context.installBundle("test-bundle-v2", is);
+        is.close();
+
+        discoverer = new EquinoxServiceDiscoverer(context);
+    }
+
+    /**
+     * @throws java.lang.Exception
+     */
+    @AfterClass
+    public static void tearDownAfterClass() throws Exception {
+        if (testBundle1 != null) {
+            // Uninstall the bundle to clean up the cache
+            testBundle1.uninstall();
+        }
+        if (testBundle2 != null) {
+            // Uninstall the bundle to clean up the cache
+            testBundle2.uninstall();
+        }
+        host.stop();
+        System.out.println("Done");
+    }
+
+    @Test
+    public void testDiscovery() throws IOException {
+        // Both version 1 and 2 should be found because test.TestService is not a Tuscany service
+        Collection<ServiceDeclaration> descriptors = discoverer.getServiceDeclarations("test.TestService");
+        Assert.assertEquals(2, descriptors.size());
+        descriptors = discoverer.getServiceDeclarations("notthere");
+        Assert.assertEquals(0, descriptors.size());
+    }
+
+    @Test
+    public void testDiscoveryFirst() throws IOException {
+        ServiceDeclaration descriptor = discoverer.getServiceDeclaration("test.TestService");
+        Assert.assertNotNull(descriptor);
+        descriptor = discoverer.getServiceDeclaration("notthere");
+        Assert.assertNull(descriptor);
+    }
+
+    @Test
+    public void testTuscanyDiscovery() throws IOException {
+        Collection<ServiceDeclaration> descriptors = discoverer.getServiceDeclarations("org.apache.tuscany.sca.test.TestService");
+        // Only the version 2 should be found
+        Assert.assertEquals(1, descriptors.size());
+        ServiceDeclaration sd = descriptors.iterator().next();
+        Assert.assertEquals("2", sd.getAttributes().get("version"));
+    }
+
+}
diff --git a/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/TestEquinoxHost.java b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/TestEquinoxHost.java
new file mode 100644
index 0000000000..566cd6e1a5
--- /dev/null
+++ b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/TestEquinoxHost.java
@@ -0,0 +1,77 @@
+/*
+ * 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.extensibility.equinox;
+
+import java.io.File;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.launch.Framework;
+import org.osgi.framework.launch.FrameworkFactory;
+
+/**
+ * A test host that starts/stops Equinox.
+ *
+ * @version $Rev$ $Date$
+ */
+public class TestEquinoxHost {
+    private Framework framework;
+
+    private BundleContext init() throws Exception {
+        if (framework != null) {
+            throw new IllegalStateException("The framework is started already");
+        }
+        ServiceDeclaration sd = ServiceDiscovery.getInstance().getServiceDeclaration(FrameworkFactory.class.getName());
+        Class<?> factoryCls = sd.loadClass();
+        FrameworkFactory factory = (FrameworkFactory)factoryCls.newInstance();
+        Map<Object, Object> props = new HashMap<Object, Object>();
+        props.put("osgi.clean", "true");
+        props.put("osgi.instance.area", new File("target/workspace").toURI().toString());
+        props.put("osgi.install.area", new File("target/eclipse").toURI().toString());
+        props.put("osgi.configuration.area", new File("target/eclipse").toURI().toString());
+        framework = factory.newFramework(props);
+        framework.start();
+        return framework.getBundleContext();
+    }
+
+    public BundleContext start() {
+        try {
+            return init();
+        } catch (Exception e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    public void stop() {
+        try {
+            if (framework != null) {
+                framework.stop();
+                framework.waitForStop(2000);
+                framework = null;
+            }
+        } catch (Exception e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+}
diff --git a/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/resources/test-bundle-v1.jar b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/resources/test-bundle-v1.jar
new file mode 100644
index 0000000000..61c7b5a49e
--- /dev/null
+++ b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/resources/test-bundle-v1.jar
diff --git a/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/resources/test-bundle-v2.jar b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/resources/test-bundle-v2.jar
new file mode 100644
index 0000000000..b02c368c58
--- /dev/null
+++ b/sandbox/sebastien/java/embed/modules/extensibility-equinox/src/test/resources/test-bundle-v2.jar