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authordims <dims@13f79535-47bb-0310-9956-ffa450edef68>2008-06-17 00:23:01 +0000
committerdims <dims@13f79535-47bb-0310-9956-ffa450edef68>2008-06-17 00:23:01 +0000
commitbdd0a41aed7edf21ec2a65cfa17a86af2ef8c48a (patch)
tree38a92061c0793434c4be189f1d70c3458b6bc41d /java/sca/modules/extensibility
Move Tuscany from Incubator to top level.
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@668359 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'java/sca/modules/extensibility')
-rw-r--r--java/sca/modules/extensibility/LICENSE205
-rw-r--r--java/sca/modules/extensibility/NOTICE5
-rw-r--r--java/sca/modules/extensibility/pom.xml50
-rw-r--r--java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java184
-rw-r--r--java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultModuleActivatorExtensionPoint.java92
-rw-r--r--java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultUtilityExtensionPoint.java184
-rw-r--r--java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ExtensionPointRegistry.java56
-rw-r--r--java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivator.java60
-rw-r--r--java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivatorExtensionPoint.java53
-rw-r--r--java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/UtilityExtensionPoint.java54
-rw-r--r--java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDeclaration.java136
-rw-r--r--java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java310
-rw-r--r--java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.ModuleActivatorExtensionPoint18
-rw-r--r--java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.UtilityExtensionPoint18
14 files changed, 1425 insertions, 0 deletions
diff --git a/java/sca/modules/extensibility/LICENSE b/java/sca/modules/extensibility/LICENSE
new file mode 100644
index 0000000000..8aa906c321
--- /dev/null
+++ b/java/sca/modules/extensibility/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
+
+ 1. Definitions.
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+ "Work" shall mean the work of authorship, whether in Source or
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+ "Derivative Works" shall mean any work, whether in Source or Object
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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
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+ the Work and Derivative Works thereof.
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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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+ or by an individual or Legal Entity authorized to submit on behalf of
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+ to the Licensor or its representatives, including but not limited to
+ communication on electronic mailing lists, source code control systems,
+ and issue tracking systems that are managed by, or on behalf of, the
+ Licensor for the purpose of discussing and improving the Work, but
+ excluding communication that is conspicuously marked or otherwise
+ designated in writing by the copyright owner as "Not a Contribution."
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+ "Contributor" shall mean Licensor and any individual or Legal Entity
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+ 2. Grant of Copyright License. Subject to the terms and conditions of
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+ (except as stated in this section) patent license to make, have made,
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+ 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
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+ (c) You must retain, in the Source form of any Derivative Works
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+ 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,
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+ 7. Disclaimer of Warranty. Unless required by applicable law or
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diff --git a/java/sca/modules/extensibility/NOTICE b/java/sca/modules/extensibility/NOTICE
new file mode 100644
index 0000000000..b3e4797aaa
--- /dev/null
+++ b/java/sca/modules/extensibility/NOTICE
@@ -0,0 +1,5 @@
+Copyright (c) 2005 - 2008 The Apache Software Foundation
+
+This product includes software developed by
+The Apache Software Foundation (http://www.apache.org/).
+
diff --git a/java/sca/modules/extensibility/pom.xml b/java/sca/modules/extensibility/pom.xml
new file mode 100644
index 0000000000..01cd2d0ca9
--- /dev/null
+++ b/java/sca/modules/extensibility/pom.xml
@@ -0,0 +1,50 @@
+<?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>1.4-SNAPSHOT</version>
+ <relativePath>../pom.xml</relativePath>
+ </parent>
+ <artifactId>tuscany-extensibility</artifactId>
+ <name>Apache Tuscany SCA Extensibility</name>
+
+
+ <build>
+ <plugins>
+ <plugin>
+ <groupId>org.apache.felix</groupId>
+ <artifactId>maven-bundle-plugin</artifactId>
+
+ <configuration>
+ <instructions>
+ <Bundle-Version>${tuscany.version}</Bundle-Version>
+ <Bundle-SymbolicName>org.apache.tuscany.sca.extensibility</Bundle-SymbolicName>
+ <Bundle-Description>${pom.name}</Bundle-Description>
+ <Export-Package>org.apache.tuscany.sca.*</Export-Package>
+ </instructions>
+ </configuration>
+ </plugin>
+ </plugins>
+ </build>
+
+</project>
diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java
new file mode 100644
index 0000000000..48f240559c
--- /dev/null
+++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java
@@ -0,0 +1,184 @@
+/*
+ * 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.core;
+
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Modifier;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+
+/**
+ * Default implementation of a registry to hold all the Tuscany core extension
+ * points. As the point of contact for all extension artifacts this registry
+ * allows loaded extensions to find all other parts of the system and register
+ * themselves appropriately.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultExtensionPointRegistry implements ExtensionPointRegistry {
+ private Map<Class<?>, Object> extensionPoints = new HashMap<Class<?>, Object>();
+
+ /**
+ * Constructs a new registry.
+ */
+ public DefaultExtensionPointRegistry() {
+ }
+
+ /**
+ * Add an extension point to the registry. This default implementation
+ * stores extensions against the interfaces that they implement.
+ *
+ * @param extensionPoint The instance of the extension point
+ *
+ * @throws IllegalArgumentException if extensionPoint is null
+ */
+ public void addExtensionPoint(Object extensionPoint) {
+ if (extensionPoint == null) {
+ throw new IllegalArgumentException("Cannot register null as an ExtensionPoint");
+ }
+
+ Set<Class<?>> interfaces = getAllInterfaces(extensionPoint.getClass());
+ for (Class<?> i : interfaces) {
+ extensionPoints.put(i, extensionPoint);
+ }
+ }
+
+ private Constructor<?> getConstructor(Constructor<?>[] constructors, Class<?>[] paramTypes) {
+ for (Constructor<?> c : constructors) {
+ Class<?>[] types = c.getParameterTypes();
+ if (c.getParameterTypes().length == paramTypes.length) {
+ boolean found = true;
+ for (int i = 0; i < types.length; i++) {
+ if (types[i] != paramTypes[i]) {
+ found = false;
+ break;
+ }
+ }
+ if (found) {
+ return c;
+ }
+ }
+ }
+ return null;
+ }
+
+ /**
+ * Get the extension point by the interface that it implements
+ *
+ * @param extensionPointType The lookup key (extension point interface)
+ * @return The instance of the extension point
+ *
+ * @throws IllegalArgumentException if extensionPointType is null
+ */
+ public <T> T getExtensionPoint(Class<T> extensionPointType) {
+ if (extensionPointType == null) {
+ throw new IllegalArgumentException("Cannot lookup ExtensionPoint of type null");
+ }
+
+ Object extensionPoint = extensionPoints.get(extensionPointType);
+ if (extensionPoint == null) {
+
+ // Dynamically load an extension point class declared under META-INF/services
+ try {
+ Class<?> extensionPointClass =
+ ServiceDiscovery.getInstance().loadFirstServiceClass(extensionPointType);
+ if (extensionPointClass != null) {
+ // Construct the extension point
+ Constructor<?>[] constructors = extensionPointClass.getConstructors();
+ Constructor<?> constructor = getConstructor(constructors, new Class<?>[] {ExtensionPointRegistry.class});
+ if (constructor != null) {
+ extensionPoint = constructor.newInstance(this);
+ } else {
+ constructor = getConstructor(constructors, new Class<?>[] {});
+ if (constructor != null) {
+ extensionPoint = constructor.newInstance();
+ } else {
+ throw new IllegalArgumentException(
+ "No valid constructor is found for " + extensionPointClass);
+ }
+ }
+
+ // Cache the loaded extension point
+ addExtensionPoint(extensionPoint);
+ }
+ } catch (InvocationTargetException e) {
+ throw new IllegalArgumentException(e);
+ } catch (IOException e) {
+ throw new IllegalArgumentException(e);
+ } catch (ClassNotFoundException e) {
+ throw new IllegalArgumentException(e);
+ } catch (InstantiationException e) {
+ throw new IllegalArgumentException(e);
+ } catch (IllegalAccessException e) {
+ throw new IllegalArgumentException(e);
+ }
+ }
+ return extensionPointType.cast(extensionPoint);
+ }
+
+ /**
+ * Remove an extension point based on the interface that it implements
+ *
+ * @param extensionPoint The extension point to remove
+ *
+ * @throws IllegalArgumentException if extensionPoint is null
+ */
+ public void removeExtensionPoint(Object extensionPoint) {
+ if (extensionPoint == null) {
+ throw new IllegalArgumentException("Cannot remove null as an ExtensionPoint");
+ }
+
+ Set<Class<?>> interfaces = getAllInterfaces(extensionPoint.getClass());
+ for (Class<?> i : interfaces) {
+ extensionPoints.remove(i);
+ }
+ }
+
+ /**
+ * Returns the set of interfaces implemented by the given class and its
+ * ancestors or a blank set if none
+ */
+ private static Set<Class<?>> getAllInterfaces(Class<?> clazz) {
+ Set<Class<?>> implemented = new HashSet<Class<?>>();
+ getAllInterfaces(clazz, implemented);
+ return implemented;
+ }
+
+ private static void getAllInterfaces(Class<?> clazz, Set<Class<?>> implemented) {
+ Class<?>[] interfaces = clazz.getInterfaces();
+ for (Class<?> interfaze : interfaces) {
+ if (Modifier.isPublic(interfaze.getModifiers())) {
+ implemented.add(interfaze);
+ }
+ }
+ Class<?> superClass = clazz.getSuperclass();
+ // Object has no superclass so check for null
+ if (superClass != null && !superClass.equals(Object.class)) {
+ getAllInterfaces(superClass, implemented);
+ }
+ }
+
+}
diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultModuleActivatorExtensionPoint.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultModuleActivatorExtensionPoint.java
new file mode 100644
index 0000000000..8ca030c0dd
--- /dev/null
+++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultModuleActivatorExtensionPoint.java
@@ -0,0 +1,92 @@
+/*
+ * 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.core;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+
+/**
+ * Default implementation of an extension point to hold Tuscany module activators.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultModuleActivatorExtensionPoint implements ModuleActivatorExtensionPoint {
+ private List<ModuleActivator> activators = new ArrayList<ModuleActivator>();
+ private boolean loadedActivators;
+
+ /**
+ * Constructs a new extension point.
+ */
+ public DefaultModuleActivatorExtensionPoint() {
+ }
+
+ public void addModuleActivator(ModuleActivator activator) {
+ activators.add(activator);
+ }
+
+ public List<ModuleActivator> getModuleActivators() {
+ loadModuleActivators();
+ return activators;
+ }
+
+ public void removeModuleActivator(Object activator) {
+ activators.remove(activator);
+ }
+
+ /**
+ * Dynamically load module activators declared under META-INF/services
+ */
+ private void loadModuleActivators() {
+ if (loadedActivators)
+ return;
+
+ // Get the activator service declarations
+ Set<ServiceDeclaration> activatorDeclarations;
+ try {
+ activatorDeclarations = ServiceDiscovery.getInstance().getServiceDeclarations(ModuleActivator.class);
+ } catch (IOException e) {
+ throw new IllegalStateException(e);
+ }
+
+ // Load and instantiate module activators
+ for (ServiceDeclaration activatorDeclaration: activatorDeclarations) {
+ ModuleActivator activator;
+ try {
+ Class<ModuleActivator> activatorClass = (Class<ModuleActivator>)activatorDeclaration.loadClass();
+ activator = activatorClass.newInstance();
+ } catch (ClassNotFoundException e) {
+ throw new IllegalArgumentException(e);
+ } catch (InstantiationException e) {
+ throw new IllegalArgumentException(e);
+ } catch (IllegalAccessException e) {
+ throw new IllegalArgumentException(e);
+ }
+ addModuleActivator(activator);
+ }
+
+ loadedActivators = true;
+ }
+
+}
diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultUtilityExtensionPoint.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultUtilityExtensionPoint.java
new file mode 100644
index 0000000000..6f7c83c8d9
--- /dev/null
+++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultUtilityExtensionPoint.java
@@ -0,0 +1,184 @@
+/*
+ * 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.core;
+
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Modifier;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+
+/**
+ * Default implementation of an extension point to hold Tuscany utility utilities.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultUtilityExtensionPoint implements UtilityExtensionPoint {
+ private Map<Class<?>, Object> utilities = new HashMap<Class<?>, Object>();
+
+ private ExtensionPointRegistry extensionPoints;
+
+ /**
+ * Constructs a new extension point.
+ */
+ public DefaultUtilityExtensionPoint(ExtensionPointRegistry extensionPoints) {
+ this.extensionPoints = extensionPoints;
+ }
+
+ /**
+ * Add a utility to the extension point. This default implementation
+ * stores utilities against the interfaces that they implement.
+ *
+ * @param utility The instance of the utility
+ *
+ * @throws IllegalArgumentException if utility is null
+ */
+ public void addUtility(Object utility) {
+ if (utility == null) {
+ throw new IllegalArgumentException("Cannot register null as a Service");
+ }
+
+ Set<Class<?>> interfaces = getAllInterfaces(utility.getClass());
+ for (Class<?> i : interfaces) {
+ utilities.put(i, utility);
+ }
+ }
+
+ private Constructor<?> getConstructor(Constructor<?>[] constructors, Class<?>[] paramTypes) {
+ for (Constructor<?> c : constructors) {
+ Class<?>[] types = c.getParameterTypes();
+ if (c.getParameterTypes().length == paramTypes.length) {
+ boolean found = true;
+ for (int i = 0; i < types.length; i++) {
+ if (types[i] != paramTypes[i]) {
+ found = false;
+ break;
+ }
+ }
+ if (found) {
+ return c;
+ }
+ }
+ }
+ return null;
+ }
+
+ /**
+ * Get the utility by the interface that it implements
+ *
+ * @param utilityType The lookup key (utility interface)
+ * @return The instance of the utility
+ *
+ * @throws IllegalArgumentException if utilityType is null
+ */
+ public <T> T getUtility(Class<T> utilityType) {
+ if (utilityType == null) {
+ throw new IllegalArgumentException("Cannot lookup Service of type null");
+ }
+
+ Object utility = utilities.get(utilityType);
+ if (utility == null) {
+
+ // Dynamically load a utility class declared under META-INF/utilities
+ try {
+ Class<?> utilityClass =
+ ServiceDiscovery.getInstance().loadFirstServiceClass(utilityType);
+ if (utilityClass != null) {
+ // Construct the utility
+ Constructor<?>[] constructors = utilityClass.getConstructors();
+ Constructor<?> constructor = getConstructor(constructors, new Class<?>[] {ExtensionPointRegistry.class});
+ if (constructor != null) {
+ utility = constructor.newInstance(extensionPoints);
+ } else {
+ constructor = getConstructor(constructors, new Class<?>[] {});
+ if (constructor != null) {
+ utility = constructor.newInstance();
+ } else {
+ throw new IllegalArgumentException(
+ "No valid constructor is found for " + utilityClass);
+ }
+ }
+
+ // Cache the loaded utility
+ addUtility(utility);
+ }
+ } catch (InvocationTargetException e) {
+ throw new IllegalArgumentException(e);
+ } catch (IOException e) {
+ throw new IllegalArgumentException(e);
+ } catch (ClassNotFoundException e) {
+ throw new IllegalArgumentException(e);
+ } catch (InstantiationException e) {
+ throw new IllegalArgumentException(e);
+ } catch (IllegalAccessException e) {
+ throw new IllegalArgumentException(e);
+ }
+ }
+ return utilityType.cast(utility);
+ }
+
+ /**
+ * Remove a utility based on the interface that it implements
+ *
+ * @param utility The utility to remove
+ *
+ * @throws IllegalArgumentException if utility is null
+ */
+ public void removeUtility(Object utility) {
+ if (utility == null) {
+ throw new IllegalArgumentException("Cannot remove null as a Service");
+ }
+
+ Set<Class<?>> interfaces = getAllInterfaces(utility.getClass());
+ for (Class<?> i : interfaces) {
+ utilities.remove(i);
+ }
+ }
+
+ /**
+ * Returns the set of interfaces implemented by the given class and its
+ * ancestors or a blank set if none
+ */
+ private static Set<Class<?>> getAllInterfaces(Class<?> clazz) {
+ Set<Class<?>> implemented = new HashSet<Class<?>>();
+ getAllInterfaces(clazz, implemented);
+ return implemented;
+ }
+
+ private static void getAllInterfaces(Class<?> clazz, Set<Class<?>> implemented) {
+ Class<?>[] interfaces = clazz.getInterfaces();
+ for (Class<?> interfaze : interfaces) {
+ if (Modifier.isPublic(interfaze.getModifiers())) {
+ implemented.add(interfaze);
+ }
+ }
+ Class<?> superClass = clazz.getSuperclass();
+ // Object has no superclass so check for null
+ if (superClass != null && !superClass.equals(Object.class)) {
+ getAllInterfaces(superClass, implemented);
+ }
+ }
+
+}
diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ExtensionPointRegistry.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ExtensionPointRegistry.java
new file mode 100644
index 0000000000..f2f67b2d52
--- /dev/null
+++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ExtensionPointRegistry.java
@@ -0,0 +1,56 @@
+/*
+ * 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.core;
+
+
+/**
+ * The registry for the Tuscany core extension points. As the point of contact
+ * for all extension artifacts this registry allows loaded extensions to find
+ * all other parts of the system and register themselves appropriately.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface ExtensionPointRegistry {
+
+ /**
+ * Add an extension point to the registry
+ * @param extensionPoint The instance of the extension point
+ *
+ * @throws IllegalArgumentException if extensionPoint is null
+ */
+ void addExtensionPoint(Object extensionPoint);
+
+ /**
+ * Get the extension point by the interface
+ * @param extensionPointType The lookup key (extension point interface)
+ * @return The instance of the extension point
+ *
+ * @throws IllegalArgumentException if extensionPointType is null
+ */
+ <T> T getExtensionPoint(Class<T> extensionPointType);
+
+ /**
+ * Remove an extension point
+ * @param extensionPoint The extension point to remove
+ *
+ * @throws IllegalArgumentException if extensionPoint is null
+ */
+ void removeExtensionPoint(Object extensionPoint);
+}
diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivator.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivator.java
new file mode 100644
index 0000000000..dbfd0dcd90
--- /dev/null
+++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivator.java
@@ -0,0 +1,60 @@
+/*
+ * 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.core;
+
+
+/**
+ * ModuleActivator represents a module that plugs into the Tuscany system. Each
+ * module should provide an implementation of this interface and register the
+ * ModuleActivator implementation class by defining a file named
+ *
+ * "META-INF/services/org.apache.tuscany.core.ModuleActivator"
+ *
+ * The content of the file is the class name of the ModuleActivator implementation.
+ * The implementation class must have a no-arg constructor. The same instance
+ * will be used to invoke all the methods during different phases of the module
+ * activation. Note that the start and stop methods defined by this interface
+ * take a reference to the Tuscany SCA runtime ExtensionPointRegistry. This
+ * gives the ModuleActivator the opportunity to add extension points to the
+ * registry as it is requested to start up and remove them when it is requested
+ * to shut down.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface ModuleActivator {
+
+ /**
+ * This method is invoked when the module is started by the Tuscany system.
+ * It can be used by this module to register extensions against extension
+ * points.
+ *
+ * @param registry The extension point registry
+ */
+ void start(ExtensionPointRegistry registry);
+
+ /**
+ * This method is invoked when the module is stopped by the Tuscany system.
+ * It can be used by this module to unregister extensions against the
+ * extension points.
+ *
+ * @param registry The extension point registry
+ */
+ void stop(ExtensionPointRegistry registry);
+}
diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivatorExtensionPoint.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivatorExtensionPoint.java
new file mode 100644
index 0000000000..ec0f12b8ba
--- /dev/null
+++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivatorExtensionPoint.java
@@ -0,0 +1,53 @@
+/*
+ * 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.core;
+
+import java.util.List;
+
+
+/**
+ * The extension point for the Tuscany module activator extensions.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface ModuleActivatorExtensionPoint {
+
+ /**
+ * Add a module activator extension to the extension point
+ * @param activator The instance of the module activator
+ *
+ * @throws IllegalArgumentException if activator is null
+ */
+ void addModuleActivator(ModuleActivator activator);
+
+ /**
+ * Returns the module activator extensions.
+ * @return The module activator extensions
+ */
+ List<ModuleActivator> getModuleActivators();
+
+ /**
+ * Remove a module activator
+ * @param activator The module activator to remove
+ *
+ * @throws IllegalArgumentException if activator is null
+ */
+ void removeModuleActivator(Object activator);
+}
diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/UtilityExtensionPoint.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/UtilityExtensionPoint.java
new file mode 100644
index 0000000000..6b14b95666
--- /dev/null
+++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/UtilityExtensionPoint.java
@@ -0,0 +1,54 @@
+/*
+ * 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.core;
+
+
+/**
+ * The extension point for the Tuscany core utility extensions.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface UtilityExtensionPoint {
+
+ /**
+ * Add a utility to the extension point
+ * @param utility The instance of the utility
+ *
+ * @throws IllegalArgumentException if utility is null
+ */
+ void addUtility(Object utility);
+
+ /**
+ * Get the utility by the interface
+ * @param utilityType The lookup key (utility interface)
+ * @return The instance of the utility
+ *
+ * @throws IllegalArgumentException if utilityType is null
+ */
+ <T> T getUtility(Class<T> utilityType);
+
+ /**
+ * Remove a utility
+ * @param utility The utility to remove
+ *
+ * @throws IllegalArgumentException if utility is null
+ */
+ void removeUtility(Object utility);
+}
diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDeclaration.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDeclaration.java
new file mode 100644
index 0000000000..4b25f2adc2
--- /dev/null
+++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDeclaration.java
@@ -0,0 +1,136 @@
+/*
+ * 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;
+
+import java.lang.ref.WeakReference;
+import java.net.URL;
+import java.util.Map;
+
+/**
+ * Service declaration using J2SE Jar service provider spec Classes specified
+ * inside this declaration are loaded using the ClassLoader used to read the
+ * configuration file corresponding to this declaration.
+ *
+ * @version $Rev$ $Date$
+ */
+public class ServiceDeclaration {
+
+ private WeakReference<ClassLoader> classLoader;
+
+ private String className;
+
+ private Map<String, String> attributes;
+
+ /**
+ * Service declaration constructor
+ *
+ * @param className Service implementation class name
+ * @param classLoader ClassLoader corresponding to this service
+ * implementation
+ * @param attributes Optional attributes for this service declaration
+ */
+ public ServiceDeclaration(String className, ClassLoader classLoader, Map<String, String> attributes) {
+
+ this.className = className;
+ this.classLoader = new WeakReference<ClassLoader>(classLoader);
+ this.attributes = attributes;
+ }
+
+ /**
+ * Load this service implementation class
+ *
+ * @return Class
+ * @throws ClassNotFoundException
+ */
+ @SuppressWarnings("unchecked")
+ public Class<?> loadClass() throws ClassNotFoundException {
+
+ return Class.forName(className, true, classLoader.get());
+ }
+
+ /**
+ * Load another class using the ClassLoader of this service implementation
+ *
+ * @param anotherClassName
+ * @return Class
+ * @throws ClassNotFoundException
+ */
+ public Class<?> loadClass(String anotherClassName) throws ClassNotFoundException {
+
+ return Class.forName(anotherClassName, true, classLoader.get());
+ }
+
+ /**
+ * Return the resource corresponding to this service implementation class
+ *
+ * @return resource URL
+ */
+ public URL getResource() {
+ return classLoader.get().getResource(className);
+ }
+
+ /**
+ * ClassLoader associated with this service declaration
+ *
+ * @return ClassLoader
+ */
+ public ClassLoader getClassLoader() {
+ return classLoader.get();
+ }
+
+ /**
+ * Service implementation class corresponding to this declaration
+ *
+ * @return The Service implementation class corresponding to this declaration
+ */
+ public String getClassName() {
+ return className;
+ }
+
+ /**
+ * Attributes specified for this declaration
+ *
+ * @return attributes
+ */
+ public Map<String, String> getAttributes() {
+ return attributes;
+ }
+
+ /**
+ * Equals method used to ensure that each service declaration is stored only
+ * once in a set of declarations.
+ */
+ @Override
+ public boolean equals(Object o) {
+ if (!(o instanceof ServiceDeclaration))
+ return false;
+ ServiceDeclaration s = (ServiceDeclaration)o;
+ if (!className.equals(s.className))
+ return false;
+ else if (!classLoader.equals(s.classLoader))
+ return false;
+ else if (attributes == null)
+ return s.attributes == null;
+ else
+ return attributes.equals(s.attributes);
+
+ }
+
+}
diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java
new file mode 100644
index 0000000000..fcf7843fa9
--- /dev/null
+++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java
@@ -0,0 +1,310 @@
+/*
+ * 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;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.security.AccessController;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Hashtable;
+import java.util.Map;
+import java.util.Set;
+import java.util.StringTokenizer;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * Service discovery for Tuscany based on J2SE Jar service provider spec.
+ * Services are described using configuration files in META-INF/services.
+ * Service description specifies a class name followed by optional properties.
+ * Multi-ClassLoader environments are supported through a ClassLoader
+ * registration API
+ *
+ * @version $Rev$ $Date$
+ */
+public class ServiceDiscovery {
+ private static final Logger logger = Logger.getLogger(ServiceDiscovery.class.getName());
+
+ private static ServiceDiscovery instance;
+
+ private HashSet<ClassLoader> registeredClassLoaders;
+
+ /**
+ * Get an instance of Service discovery, one instance is created per
+ * ClassLoader that this class is loaded from
+ *
+ * @return
+ */
+ public static ServiceDiscovery getInstance() {
+
+ if (instance == null) {
+ instance = new ServiceDiscovery();
+ instance.registeredClassLoaders = new HashSet<ClassLoader>();
+ instance.registeredClassLoaders.add(ServiceDiscovery.class.getClassLoader());
+ }
+ return instance;
+ }
+
+ /**
+ * Register a ClassLoader with this discovery mechanism. Tuscany extension
+ * ClassLoaders are registered here.
+ *
+ * @param classLoader
+ */
+ public synchronized void registerClassLoader(ClassLoader classLoader) {
+ registeredClassLoaders.add(classLoader);
+ }
+
+ /**
+ * Unregister a ClassLoader with this discovery mechanism.
+ *
+ * @param classLoader
+ */
+ public synchronized void unregisterClassLoader(ClassLoader classLoader) {
+ registeredClassLoaders.remove(classLoader);
+ }
+
+ /**
+ * Get all service declarations for this name
+ *
+ * @param name
+ * @return set of service declarations
+ * @throws IOException
+ */
+ public Set<ServiceDeclaration> getServiceDeclarations(String name) throws IOException {
+
+ Set<ServiceDeclaration> classSet = new HashSet<ServiceDeclaration>();
+
+ for (ClassLoader classLoader : registeredClassLoaders) {
+ getServiceClasses(classLoader, name, classSet, true);
+ }
+ return classSet;
+ }
+
+ /**
+ * Get all service declarations for this interface
+ *
+ * @param serviceInterface
+ * @return set of service declarations
+ * @throws IOException
+ */
+ public Set<ServiceDeclaration> getServiceDeclarations(Class<?> serviceInterface) throws IOException {
+
+ return getServiceDeclarations(serviceInterface.getName());
+ }
+
+ /**
+ * Load one service implementation class for this interface
+ *
+ * @param serviceInterface
+ * @return service implementation class
+ * @throws IOException
+ * @throws ClassNotFoundException
+ */
+ public Class<?> loadFirstServiceClass(Class<?> serviceInterface) throws IOException, ClassNotFoundException {
+
+ Set<ServiceDeclaration> classSet = new HashSet<ServiceDeclaration>();
+
+ for (ClassLoader classLoader : registeredClassLoaders) {
+ getServiceClasses(classLoader, serviceInterface.getName(), classSet, false);
+ if (classSet.size() > 0)
+ break;
+ }
+ if (classSet.size() > 0)
+ return classSet.iterator().next().loadClass();
+ else
+ return null;
+
+ }
+
+ /**
+ * Returns a unique list of resource URLs of name META-INF/services/<name>
+ * Each URL is associated with the first ClassLoader that it was visible
+ * from
+ *
+ * @param name Name of resource
+ * @return Table of URLs with associated ClassLoaders
+ * @throws IOException
+ */
+ public Hashtable<ClassLoader, Set<URL>> getServiceResources(final String name) throws IOException {
+
+ Hashtable<ClassLoader, Set<URL>> resourceTable = new Hashtable<ClassLoader, Set<URL>>();
+
+ HashSet<URL> allURLs = new HashSet<URL>();
+ for (final ClassLoader classLoader : registeredClassLoaders) {
+ HashSet<URL> urls = new HashSet<URL>();
+ resourceTable.put(classLoader, urls);
+ boolean debug = logger.isLoggable(Level.FINE);
+ if (debug) {
+ logger.fine("Discovering service resources using class loader " + classLoader);
+ }
+ // Allow privileged access to read META-INF/services/*. Add FilePermission to added to security policy file.
+ ArrayList<URL> urlList;
+ try {
+ // FIXME J2 Security - promote this to callers of this method
+ urlList = AccessController.doPrivileged(new PrivilegedExceptionAction<ArrayList<URL>>() {
+ public ArrayList<URL> run() throws IOException {
+ return Collections.list(classLoader.getResources("META-INF/services/" + name));
+ }
+ });
+ } catch (PrivilegedActionException e) {
+ throw (IOException)e.getException();
+ }
+
+ for (URL url : urlList) {
+ if (allURLs.contains(url))
+ continue;
+ urls.add(url);
+ }
+ allURLs.addAll(urls);
+ }
+ return resourceTable;
+ }
+
+ /**
+ * Parse a service declaration in the form class;attr=value,attr=value and
+ * return a map of attributes
+ *
+ * @param declaration
+ * @return a map of attributes
+ */
+ private Map<String, String> parseServiceDeclaration(String declaration) {
+ Map<String, String> attributes = new HashMap<String, String>();
+ int index = declaration.indexOf(';');
+ if (index != -1) {
+ attributes.put("class", declaration.substring(0, index).trim());
+ declaration = declaration.substring(index);
+ } else {
+ int j = declaration.indexOf('=');
+ if (j == -1) {
+ attributes.put("class", declaration.trim());
+ return attributes;
+ } else {
+ declaration = ";" + declaration;
+ }
+ }
+ StringTokenizer tokens = new StringTokenizer(declaration);
+ for (; tokens.hasMoreTokens();) {
+ String key = tokens.nextToken("=").substring(1).trim();
+ if (key == null)
+ break;
+ String value = tokens.nextToken(",").substring(1).trim();
+ if (value == null)
+ break;
+ attributes.put(key, value);
+ }
+ return attributes;
+ }
+
+ /**
+ * Load the service class whose name specified in a configuration file
+ *
+ * @param classLoader
+ * @param name The name of the service class
+ * @param classSet Populate this set with classes extends/implements the
+ * service class
+ * @throws IOException
+ */
+ private void getServiceClasses(final ClassLoader classLoader,
+ final String name,
+ Set<ServiceDeclaration> classSet,
+ boolean findAllClasses) throws IOException {
+
+ boolean debug = logger.isLoggable(Level.FINE);
+ if (debug) {
+ logger.fine("Discovering service providers using class loader " + classLoader);
+ }
+ // Allow privileged access to read META-INF/services/*. Add FilePermission to added to
+ // security policy file.
+ ArrayList<URL> urlList;
+ try {
+ urlList = AccessController.doPrivileged(new PrivilegedExceptionAction<ArrayList<URL>>() {
+ public ArrayList<URL> run() throws IOException {
+ return Collections.list(classLoader.getResources("META-INF/services/" + name));
+ }
+ });
+ } catch (PrivilegedActionException e) {
+ throw (IOException)e.getException();
+ }
+
+ for (final URL url : urlList) {
+ if (debug) {
+ logger.fine("Reading service provider file: " + url.toExternalForm());
+ }
+
+ // Allow privileged access to open URL stream. Add FilePermission to added to security
+ // policy file.
+ InputStream is;
+ try {
+ is = AccessController.doPrivileged(new PrivilegedExceptionAction<InputStream>() {
+ public InputStream run() throws IOException {
+ return url.openStream();
+ }
+ });
+ } catch (PrivilegedActionException e) {
+ throw (IOException)e.getException();
+ }
+ BufferedReader reader = null;
+ try {
+ reader = new BufferedReader(new InputStreamReader(is));
+ while (true) {
+ String line = reader.readLine();
+ if (line == null)
+ break;
+ line = line.trim();
+ if (!line.startsWith("#") && !"".equals(line)) {
+ String reg = line.trim();
+ if (debug) {
+ logger.fine("Registering service provider: " + reg);
+ }
+
+ Map<String, String> attributes = parseServiceDeclaration(reg);
+ String className = attributes.get("class");
+ ServiceDeclaration serviceClass = new ServiceDeclaration(className, classLoader, attributes);
+ classSet.add(serviceClass);
+
+ if (!findAllClasses)
+ break;
+ }
+ }
+ } finally {
+ if (reader != null)
+ reader.close();
+ if (is != null) {
+ try {
+ is.close();
+ } catch (IOException ioe) {
+ }
+ }
+ }
+ if (!findAllClasses && classSet.size() > 0)
+ break;
+ }
+ }
+
+}
diff --git a/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.ModuleActivatorExtensionPoint b/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.ModuleActivatorExtensionPoint
new file mode 100644
index 0000000000..42bad63132
--- /dev/null
+++ b/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.ModuleActivatorExtensionPoint
@@ -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.
+
+org.apache.tuscany.sca.core.DefaultModuleActivatorExtensionPoint
diff --git a/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.UtilityExtensionPoint b/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.UtilityExtensionPoint
new file mode 100644
index 0000000000..d769bad283
--- /dev/null
+++ b/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.UtilityExtensionPoint
@@ -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.
+
+org.apache.tuscany.sca.core.DefaultUtilityExtensionPoint