diff options
Diffstat (limited to 'tags/java/sca/2.0-M3/modules/extensibility/src')
18 files changed, 1719 insertions, 0 deletions
diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java new file mode 100644 index 0000000000..3ea587c5f2 --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java @@ -0,0 +1,226 @@ +/* + * 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.IdentityHashMap; +import java.util.Map; +import java.util.Set; + +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +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 synchronized void addExtensionPoint(Object extensionPoint) { + addExtensionPoint(extensionPoint, null); + } + + public synchronized void addExtensionPoint(Object extensionPoint, ServiceDeclaration declaration) { + if (extensionPoint == null) { + throw new IllegalArgumentException("Cannot register null as an ExtensionPoint"); + } + if (extensionPoint instanceof ModuleActivator) { + ((ModuleActivator)extensionPoint).start(this); + } + Set<Class<?>> interfaces = getAllInterfaces(extensionPoint.getClass()); + for (Class<?> i : interfaces) { + registerExtensionPoint(i, extensionPoint, declaration); + } + } + + protected void registerExtensionPoint(Class<?> i, Object extensionPoint, ServiceDeclaration declaration) { + 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 synchronized <T> T getExtensionPoint(Class<T> extensionPointType) { + if (extensionPointType == null) { + throw new IllegalArgumentException("Cannot lookup ExtensionPoint of type null"); + } + + Object extensionPoint = findExtensionPoint(extensionPointType); + if (extensionPoint == null) { + + // Dynamically load an extension point class declared under META-INF/services + try { + ServiceDeclaration extensionPointDeclaration = + ServiceDiscovery.getInstance().getServiceDeclaration(extensionPointType.getName()); + if (extensionPointDeclaration != null) { + Class<?> extensionPointClass = extensionPointDeclaration.loadClass(); + + // 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, extensionPointDeclaration); + } + } 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); + } + + protected <T> Object findExtensionPoint(Class<T> extensionPointType) { + return extensionPoints.get(extensionPointType); + } + + /** + * 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 synchronized void removeExtensionPoint(Object extensionPoint) { + if (extensionPoint == null) { + throw new IllegalArgumentException("Cannot remove null as an ExtensionPoint"); + } + + if (extensionPoint instanceof ModuleActivator) { + ((ModuleActivator)extensionPoint).stop(this); + } + + Set<Class<?>> interfaces = getAllInterfaces(extensionPoint.getClass()); + for (Class<?> i : interfaces) { + unregisterExtensionPoint(i); + } + } + + protected void unregisterExtensionPoint(Class<?> i) { + 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); + } + } + + public void destroy() { + // Get a unique map as an extension point may exist in the map by different keys + Map<ModuleActivator, ModuleActivator> map = new IdentityHashMap<ModuleActivator, ModuleActivator>(); + for (Object extp : extensionPoints.values()) { + if (extp instanceof ModuleActivator) { + ModuleActivator activator = (ModuleActivator)extp; + map.put(activator, activator); + } + } + for (ModuleActivator activator : map.values()) { + activator.stop(this); + } + extensionPoints.clear(); + } + +} diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java new file mode 100644 index 0000000000..54d0d118bb --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java @@ -0,0 +1,174 @@ +/* + * 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.lang.reflect.Constructor; +import java.lang.reflect.Method; +import java.lang.reflect.Modifier; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.util.HashMap; + +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +import org.apache.tuscany.sca.extensibility.ServiceDiscovery; + + + +/** + * Default implementation of a model factory extension point. + * + * @version $Rev$ $Date$ + */ +public class DefaultFactoryExtensionPoint implements FactoryExtensionPoint { + private ExtensionPointRegistry extensionPointRegistry; + private HashMap<Class<?>, Object> factories = new HashMap<Class<?>, Object>(); + + /** + * Constructs a new DefaultModelFactoryExtensionPoint. + */ + public DefaultFactoryExtensionPoint(ExtensionPointRegistry extensionPointRegistry) { + this.extensionPointRegistry = extensionPointRegistry; + } + + /** + * Add a model factory extension. + * + * @param factory The factory to add + */ + public void addFactory(Object factory) { + Class<?>[] interfaces = factory.getClass().getInterfaces(); + if (interfaces.length == 0) { + Class<?> sc = factory.getClass().getSuperclass(); + if (sc != Object.class) { + factories.put(sc, factory); + } + } else { + for (int i = 0; i<interfaces.length; i++) { + factories.put(interfaces[i], factory); + } + } + } + + /** + * Remove a model factory. + * + * @param factory The factory to remove + */ + public void removeFactory(Object factory) { + Class<?>[] interfaces = factory.getClass().getInterfaces(); + if (interfaces.length == 0) { + Class<?> sc = factory.getClass().getSuperclass(); + if (sc != Object.class) { + factories.remove(sc); + } + } else { + for (int i = 0; i<interfaces.length; i++) { + factories.remove(interfaces[i]); + } + } + } + + private ClassLoader setContextClassLoader(final ClassLoader classLoader) { + return AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() { + public ClassLoader run() { + ClassLoader tccl = Thread.currentThread().getContextClassLoader(); + if (classLoader != null) { + Thread.currentThread().setContextClassLoader(classLoader); + } + return tccl; + } + }); + } + + /** + * Get a factory implementing the given interface. + * @param factoryInterface The lookup key (factory interface) + * @return The factory + */ + public <T> T getFactory(Class<T> factoryInterface) { + Object factory = factories.get(factoryInterface); + if (factory == null) { + + // Dynamically load a factory class declared under META-INF/services + try { + ServiceDeclaration factoryDeclaration = + ServiceDiscovery.getInstance().getServiceDeclaration(factoryInterface.getName()); + if (factoryDeclaration != null) { + Class<?> factoryClass = factoryDeclaration.loadClass(); + try { + + // Default empty constructor + Constructor<?> constructor = factoryClass.getConstructor(); + factory = constructor.newInstance(); + } catch (NoSuchMethodException e) { + try { + + // Constructor taking the model factory extension point + Constructor<?> constructor = factoryClass.getConstructor(FactoryExtensionPoint.class); + factory = constructor.newInstance(this); + } catch (NoSuchMethodException e1) { + + // Constructor taking the extension point registry + Constructor<?> constructor = factoryClass.getConstructor(ExtensionPointRegistry.class); + factory = constructor.newInstance(extensionPointRegistry); + } + } + + // Cache the loaded factory + factories.put(factoryInterface, factory); + + return factoryInterface.cast(factory); + + } else { + + // If the input interface is an abstract class + if (!factoryInterface.isInterface() && Modifier.isAbstract(factoryInterface.getModifiers())) { + Method newInstanceMethod = factoryInterface.getDeclaredMethod("newInstance"); + ClassLoader tccl = setContextClassLoader(factoryInterface.getClassLoader()); + try { + + // Create a new instance + factory = newInstanceMethod.invoke(null); + + // Cache the factory + factories.put(factoryInterface, factory); + + return factoryInterface.cast(factory); + } catch (Exception e) { + // Sorry no factory found + return null; + } finally { + setContextClassLoader(tccl); + } + } else { + + // Sorry no factory found + return null; + } + } + } catch (Exception e) { + throw new IllegalArgumentException(e); + } + } else { + return factoryInterface.cast(factory); + } + } + +} diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultModuleActivatorExtensionPoint.java b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultModuleActivatorExtensionPoint.java new file mode 100644 index 0000000000..f9228efd71 --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultModuleActivatorExtensionPoint.java @@ -0,0 +1,112 @@ +/* + * 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.util.ArrayList; +import java.util.Collection; +import java.util.List; +import java.util.Map; +import java.util.logging.Level; +import java.util.logging.Logger; + +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 final static Logger logger = Logger.getLogger(DefaultModuleActivatorExtensionPoint.class.getName()); + 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 synchronized void loadModuleActivators() { + if (loadedActivators) + return; + + // Get the activator service declarations + Collection<ServiceDeclaration> activatorDeclarations; + try { + // Load the module activators by ranking + activatorDeclarations = ServiceDiscovery.getInstance().getServiceDeclarations(ModuleActivator.class.getName(), true); + } catch (IOException e) { + throw new IllegalStateException(e); + } + + // Load and instantiate module activators + for (ServiceDeclaration activatorDeclaration : activatorDeclarations) { + if (logger.isLoggable(Level.FINE)) { + logger.fine("Loading " + activatorDeclaration.getClassName()); + } + ModuleActivator activator = null; + try { + Class<ModuleActivator> activatorClass = (Class<ModuleActivator>)activatorDeclaration.loadClass(); + Constructor<ModuleActivator> constructor = null; + try { + constructor = activatorClass.getConstructor(); + activator = constructor.newInstance(); + } catch (NoSuchMethodException e) { + // Try the one that takes a Map<String, String> + constructor = activatorClass.getConstructor(Map.class); + activator = constructor.newInstance(activatorDeclaration.getAttributes()); + } + } catch (Throwable e) { + String optional = activatorDeclaration.getAttributes().get("optional"); + if ("true".equalsIgnoreCase(optional)) { + // If the optional flag is true, just log the error + logger.log(Level.SEVERE, e.getMessage(), e); + continue; + } else { + throw new IllegalArgumentException(e); + } + } + addModuleActivator(activator); + } + + loadedActivators = true; + } + +} diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultUtilityExtensionPoint.java b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultUtilityExtensionPoint.java new file mode 100644 index 0000000000..c7ff4e1858 --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultUtilityExtensionPoint.java @@ -0,0 +1,197 @@ +/* + * 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.HashSet; +import java.util.Map; +import java.util.Set; +import java.util.concurrent.ConcurrentHashMap; + +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +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 ConcurrentHashMap<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) { + return getUtility(utilityType, false); + } + + /** + * 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); + } + } + + public <T> T getUtility(Class<T> utilityType, boolean newInstance) { + if (utilityType == null) { + throw new IllegalArgumentException("Cannot lookup Service of type null"); + } + + Object utility = null; + if (!newInstance) { + utility = utilities.get(utilityType); + } + if (utility == null) { + + // Dynamically load a utility class declared under META-INF/services/"utilityType" + try { + ServiceDeclaration utilityDeclaration = + ServiceDiscovery.getInstance().getServiceDeclaration(utilityType.getName()); + if (utilityDeclaration != null) { + Class<?> utilityClass = utilityDeclaration.loadClass(); + + // Construct the utility + Constructor<?>[] constructors = utilityClass.getConstructors(); + Constructor<?> constructor = getConstructor(constructors, ExtensionPointRegistry.class, Map.class); + if (constructor != null) { + utility = constructor.newInstance(extensionPoints, utilityDeclaration.getAttributes()); + } else { + constructor = getConstructor(constructors, ExtensionPointRegistry.class); + if (constructor != null) { + utility = constructor.newInstance(extensionPoints); + } else { + constructor = getConstructor(constructors); + 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); + } + +} diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ExtensionPointRegistry.java b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ExtensionPointRegistry.java new file mode 100644 index 0000000000..d5647d6601 --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ExtensionPointRegistry.java @@ -0,0 +1,61 @@ +/* + * 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); + + /** + * Destroy the extension point registry + */ + void destroy(); +} diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/FactoryExtensionPoint.java b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/FactoryExtensionPoint.java new file mode 100644 index 0000000000..4d38cb8afe --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/FactoryExtensionPoint.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; + +/** + * An extension point for model factories. Model factories are provided to + * abstract the classes that represent artifacts in the assembly model away + * from their creation mechanism. When the runtime needs to extend the model + * as it reads in contributed artifacts it looks up the factory for the + * artifact required in this registry + * + * @version $Rev$ $Date$ + */ +public interface FactoryExtensionPoint { + + /** + * Add a model factory extension. + * + * @param factory The factory to add + */ + void addFactory(Object factory); + + /** + * Remove a model factory extension. + * + * @param factory The factory to remove + */ + void removeFactory(Object factory); + + /** + * Get a factory implementing the given interface. + * @param factoryInterface the lookup key (factory interface) + * @return The factory + */ + <T> T getFactory(Class<T> factoryInterface); + +} diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivator.java b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivator.java new file mode 100644 index 0000000000..dbfd0dcd90 --- /dev/null +++ b/tags/java/sca/2.0-M3/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/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivatorExtensionPoint.java b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivatorExtensionPoint.java new file mode 100644 index 0000000000..ec0f12b8ba --- /dev/null +++ b/tags/java/sca/2.0-M3/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/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/UtilityExtensionPoint.java b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/UtilityExtensionPoint.java new file mode 100644 index 0000000000..9804234850 --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/UtilityExtensionPoint.java @@ -0,0 +1,64 @@ +/* + * 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); + + /** + * Get a new instance of the utility by the interface + * @param utilityType The lookup key (utility interface) + * @param newInstance A new instance is required + * @return The instance of the utility + * + * @throws IllegalArgumentException if utilityType is null + */ + <T> T getUtility(Class<T> utilityType, boolean newInstance); + + /** + * Remove a utility + * @param utility The utility to remove + * + * @throws IllegalArgumentException if utility is null + */ + void removeUtility(Object utility); +} diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscoverer.java b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscoverer.java new file mode 100644 index 0000000000..13f967c053 --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscoverer.java @@ -0,0 +1,272 @@ +/* + * 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.lang.ref.WeakReference; +import java.net.URL; +import java.net.URLConnection; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.security.PrivilegedActionException; +import java.security.PrivilegedExceptionAction; +import java.util.Collection; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Properties; +import java.util.StringTokenizer; +import java.util.logging.Level; +import java.util.logging.Logger; + +/** + * A ServiceDiscoverer that find META-INF/services/... using the Context ClassLoader. + * + * @version $Rev$ $Date$ + */ +public class ContextClassLoaderServiceDiscoverer implements ServiceDiscoverer { + private static final Logger logger = Logger.getLogger(ContextClassLoaderServiceDiscoverer.class.getName()); + + public class ServiceDeclarationImpl implements ServiceDeclaration { + private URL url; + private String className; + private Class<?> javaClass; + private Map<String, String> attributes; + + public ServiceDeclarationImpl(URL url, String className, Map<String, String> attributes) { + super(); + this.url = url; + this.className = className; + this.attributes = attributes; + } + + public Map<String, String> getAttributes() { + return attributes; + } + + public String getClassName() { + return className; + } + + public URL getLocation() { + return url; + } + + 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 Class.forName(className, false, classLoaderReference.get()); + } + + @Override + public String toString() { + StringBuffer sb = new StringBuffer(); + sb.append("ClassLoader: ").append(classLoaderReference.get()); + sb.append(" Attributes: ").append(attributes); + return sb.toString(); + } + + public URL getResource(final String name) { + return AccessController.doPrivileged(new PrivilegedAction<URL>() { + public URL run() { + return classLoaderReference.get().getResource(name); + } + }); + } + + } + + private WeakReference<ClassLoader> classLoaderReference; + + public ContextClassLoaderServiceDiscoverer() { + ClassLoader classLoader = Thread.currentThread().getContextClassLoader(); + this.classLoaderReference = new WeakReference<ClassLoader>(classLoader); + } + + private List<URL> getResources(final String name) throws IOException { + try { + return AccessController.doPrivileged(new PrivilegedExceptionAction<List<URL>>() { + public List<URL> run() throws IOException { + List<URL> urls = Collections.list(classLoaderReference.get().getResources(name)); + return urls; + } + }); + } catch (PrivilegedActionException e) { + throw (IOException)e.getException(); + } + } + + /** + * 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 static 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; + } + + public ServiceDeclaration getServiceDeclaration(String name) throws IOException { + Collection<ServiceDeclaration> declarations = getServiceDeclarations(name); + if (declarations.isEmpty()) { + return null; + } else { + return declarations.iterator().next(); + } + } + + public Collection<ServiceDeclaration> getServiceDeclarations(String serviceName) { + 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); + String name = "META-INF/services/" + serviceName; + boolean debug = logger.isLoggable(Level.FINE); + try { + for (final URL url : getResources(name)) { + 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 { + URLConnection connection = url.openConnection(); + // TUSCANY-2539 + // Don't cache connections by default to stop Tuscany locking contribution jar files + // done here as this is one of the first places we open a stream and the only way to + // set the default is to set it on an instance of URLConnection + connection.setDefaultUseCaches(false); + connection.setUseCaches(false); + return url.openStream(); + } + }); + } catch (PrivilegedActionException e) { + throw (IOException)e.getException(); + } + if (isPropertyFile) { + // Load as a property file + Properties props = new Properties(); + props.load(is); + is.close(); + for (Map.Entry<Object, Object> e : props.entrySet()) { + Map<String, String> attributes = new HashMap<String, String>(); + String key = (String)e.getKey(); + String value = (String)e.getValue(); + // Unfortunately, the xalan file only has the classname + if ("".equals(value)) { + value = key; + key = ""; + } + if (!"".equals(key)) { + attributes.put(key, value); + attributes.put("uri", key); + } + attributes.put("class", value); + ServiceDeclarationImpl descriptor = new ServiceDeclarationImpl(url, value, attributes); + descriptors.add(descriptor); + } + continue; + } + BufferedReader reader = null; + try { + reader = new BufferedReader(new InputStreamReader(is)); + int count = 0; + 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"); + if (className == null) { + // Add a unique class name to prevent equals() from returning true + className = "_class_" + count; + count++; + } + ServiceDeclarationImpl descriptor = new ServiceDeclarationImpl(url, className, attributes); + descriptors.add(descriptor); + } + } + } finally { + if (reader != null) { + try { + reader.close(); + } catch (IOException e) { + // Ignore + } + } + } + } + } catch (IOException e) { + logger.log(Level.SEVERE, e.getMessage(), e); + } + return descriptors; + + } + +} diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDeclaration.java b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDeclaration.java new file mode 100644 index 0000000000..d7ac8b449f --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDeclaration.java @@ -0,0 +1,70 @@ +/* + * 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.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 interface ServiceDeclaration { + /** + * Load a java class in the same context as the service definition + * @param className The class name + * @return The loaded class + * @throws ClassNotFoundException + */ + Class<?> loadClass(String className) throws ClassNotFoundException; + + /** + * Get the java class for the service impl + * @return The java class + */ + Class<?> loadClass() throws ClassNotFoundException; + + /** + * Get all attributes (name=value pairs) defined for the given entry + * @return All attributes keyed by name + */ + Map<String, String> getAttributes(); + + URL getLocation(); + + String getClassName(); + + URL getResource(String name); + + /** + * The service descriptor might be hashed + * @param obj Another object + * @return + */ + boolean equals(Object obj); + /** + * The service descriptor might be hashed + * @return + */ + int hashCode(); +} diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscoverer.java b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscoverer.java new file mode 100644 index 0000000000..9b939e8228 --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscoverer.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; + +import java.io.IOException; +import java.util.Collection; + +/** + * A SPI that allows different implementations of discovering service declarations + */ +public interface ServiceDiscoverer { + + /** + * Get all service declarations for this interface + * + * @param name + * @return set of service declarations + * @throws IOException + */ + public Collection<ServiceDeclaration> getServiceDeclarations(String name) throws IOException; + + /** + * Get first service declaration class for the given interface + * + * @param name + * @return service implementation class + * @throws IOException + * @throws ClassNotFoundException + */ + public ServiceDeclaration getServiceDeclaration(String name) throws IOException; + +} diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java new file mode 100644 index 0000000000..a5048859f0 --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java @@ -0,0 +1,134 @@ +/* + * 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.IOException; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.Comparator; +import java.util.List; + +/** + * 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. + * + * + * @version $Rev$ $Date$ + */ +public final class ServiceDiscovery implements ServiceDiscoverer { + private final static ServiceDiscovery INSTANCE = new ServiceDiscovery(); + + private ServiceDiscoverer discoverer; + + private ServiceDiscovery() { + super(); + } + /** + * Get an instance of Service discovery, one instance is created per + * ClassLoader that this class is loaded from + * + * @return + */ + public static ServiceDiscovery getInstance() { + return INSTANCE; + } + + public ServiceDiscoverer getServiceDiscoverer() { + if (discoverer != null) { + return discoverer; + } + try { + // FIXME: This is a hack to trigger the activation of the extensibility-equinox bundle in OSGi + Class.forName("org.apache.tuscany.sca.extensibility.equinox.EquinoxServiceDiscoverer"); + if (discoverer != null) { + return discoverer; + } + } catch (Throwable e) { + } + discoverer = new ContextClassLoaderServiceDiscoverer(); + return discoverer; + } + + public void setServiceDiscoverer(ServiceDiscoverer sd) { + if (discoverer != null) { + throw new IllegalStateException("The ServiceDiscoverer cannot be reset"); + } + discoverer = sd; + } + + public Collection<ServiceDeclaration> getServiceDeclarations(String name) throws IOException { + return getServiceDeclarations(name, false); + } + + public Collection<ServiceDeclaration> getServiceDeclarations(String name, boolean byRanking) throws IOException { + Collection<ServiceDeclaration> declarations = getServiceDiscoverer().getServiceDeclarations(name); + if (!byRanking) { + return declarations; + } + if (!declarations.isEmpty()) { + List<ServiceDeclaration> declarationList = new ArrayList<ServiceDeclaration>(declarations); + Collections.sort(declarationList, ServiceComparator.DESCENDING_ORDER); + return declarationList; + } else { + return Collections.emptyList(); + } + } + + /** + * Get the service declaration. If there are more than one services, the one with highest ranking will + * be returned. + */ + public ServiceDeclaration getServiceDeclaration(final String name) throws IOException { + // ServiceDeclaration service = getServiceDiscoverer().getFirstServiceDeclaration(name); + // return service; + Collection<ServiceDeclaration> declarations = getServiceDeclarations(name, true); + if (!declarations.isEmpty()) { + List<ServiceDeclaration> declarationList = new ArrayList<ServiceDeclaration>(declarations); + Collections.sort(declarationList, ServiceComparator.DESCENDING_ORDER); + return declarationList.get(0); + } else { + return null; + } + } + + /** + * Compare service declarations by ranking + */ + private static class ServiceComparator implements Comparator<ServiceDeclaration> { + private final static Comparator<ServiceDeclaration> DESCENDING_ORDER = new ServiceComparator(); + + public int compare(ServiceDeclaration o1, ServiceDeclaration o2) { + int rank1 = 0; + String r1 = o1.getAttributes().get("ranking"); + if (r1 != null) { + rank1 = Integer.parseInt(r1); + } + int rank2 = 0; + String r2 = o2.getAttributes().get("ranking"); + if (r2 != null) { + rank2 = Integer.parseInt(r2); + } + return rank2 - rank1; // descending + } + } + +} diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.FactoryExtensionPoint b/tags/java/sca/2.0-M3/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.FactoryExtensionPoint new file mode 100644 index 0000000000..3c135aa267 --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.FactoryExtensionPoint @@ -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.DefaultFactoryExtensionPoint
diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.ModuleActivatorExtensionPoint b/tags/java/sca/2.0-M3/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.ModuleActivatorExtensionPoint new file mode 100644 index 0000000000..42bad63132 --- /dev/null +++ b/tags/java/sca/2.0-M3/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/tags/java/sca/2.0-M3/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.UtilityExtensionPoint b/tags/java/sca/2.0-M3/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.UtilityExtensionPoint new file mode 100644 index 0000000000..d769bad283 --- /dev/null +++ b/tags/java/sca/2.0-M3/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
diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/test/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscovererTestCase.java b/tags/java/sca/2.0-M3/modules/extensibility/src/test/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscovererTestCase.java new file mode 100644 index 0000000000..c0aac21596 --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/test/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscovererTestCase.java @@ -0,0 +1,81 @@ +/* + * 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.IOException; +import java.util.Collection; + +import org.junit.AfterClass; +import org.junit.Assert; +import org.junit.BeforeClass; +import org.junit.Test; + +/** + * Test Case for ClasspathServiceDiscover + */ +public class ContextClassLoaderServiceDiscovererTestCase { + private static ContextClassLoaderServiceDiscoverer discover; + + /** + * @throws java.lang.Exception + */ + @BeforeClass + public static void setUpBeforeClass() throws Exception { + discover = new ContextClassLoaderServiceDiscoverer(); + } + + @Test + public void testDiscovery() { + Collection<ServiceDeclaration> discriptors = + discover.getServiceDeclarations("org.apache.tuscany.sca.core.ModuleActivatorExtensionPoint"); + Assert.assertEquals(1, discriptors.size()); + discriptors = + discover.getServiceDeclarations("notthere"); + Assert.assertEquals(0, discriptors.size()); + } + + @Test + public void testDiscoveryFirst() throws IOException { + ServiceDeclaration descriptor = + discover.getServiceDeclaration("org.apache.tuscany.sca.core.ModuleActivatorExtensionPoint"); + Assert.assertNotNull(descriptor); + descriptor = discover.getServiceDeclaration("notthere"); + Assert.assertNull(descriptor); + } + + @Test + public void testXPathFactory() { + Collection<ServiceDeclaration> discriptors = discover.getServiceDeclarations("javax.xml.xpath.XPathFactory"); + if (!discriptors.isEmpty()) { + ServiceDeclaration d = discriptors.iterator().next(); + Assert.assertNotNull(d.getClassName()); + Assert.assertTrue(d.getAttributes().containsKey("class")); + } + } + + + /** + * @throws java.lang.Exception + */ + @AfterClass + public static void tearDownAfterClass() throws Exception { + } + +} diff --git a/tags/java/sca/2.0-M3/modules/extensibility/src/test/java/org/apache/tuscany/sca/extensibility/DefaultExtensionPointRegistryTestCase.java b/tags/java/sca/2.0-M3/modules/extensibility/src/test/java/org/apache/tuscany/sca/extensibility/DefaultExtensionPointRegistryTestCase.java new file mode 100644 index 0000000000..9758cba3b4 --- /dev/null +++ b/tags/java/sca/2.0-M3/modules/extensibility/src/test/java/org/apache/tuscany/sca/extensibility/DefaultExtensionPointRegistryTestCase.java @@ -0,0 +1,58 @@ +/* + * 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 static org.junit.Assert.assertNull; +import static org.junit.Assert.assertSame; + +import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry; +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.junit.Before; +import org.junit.Test; + +public class DefaultExtensionPointRegistryTestCase { + private ExtensionPointRegistry registry; + + @Before + public void setUp() throws Exception { + registry = new DefaultExtensionPointRegistry(); + } + + @Test + public void testRegistry() { + MyExtensionPoint service = new MyExtensionPointImpl(); + registry.addExtensionPoint(service); + assertSame(service, registry.getExtensionPoint(MyExtensionPoint.class)); + registry.removeExtensionPoint(service); + assertNull(registry.getExtensionPoint(MyExtensionPoint.class)); + } + + public static interface MyExtensionPoint { + void doSomething(); + } + + private static class MyExtensionPointImpl implements MyExtensionPoint { + + public void doSomething() { + } + + } + +} |