diff options
author | antelder <antelder@13f79535-47bb-0310-9956-ffa450edef68> | 2009-10-30 08:00:47 +0000 |
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committer | antelder <antelder@13f79535-47bb-0310-9956-ffa450edef68> | 2009-10-30 08:00:47 +0000 |
commit | fb3dd9a9095abc40027318b1712d0184f6d60e73 (patch) | |
tree | 03fcf33e2b10b43834d2ca88fe0b00641fbcd762 /branches/sca-java-2.0-M4/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java | |
parent | ccfd2c4b4f2b2bb0346cd0be71f290b122b14cd9 (diff) |
Delete old M4 branch and start again to pick up all the recent trunk changes
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@831223 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'branches/sca-java-2.0-M4/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java')
-rw-r--r-- | branches/sca-java-2.0-M4/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/branches/sca-java-2.0-M4/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java b/branches/sca-java-2.0-M4/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java deleted file mode 100644 index f6be464cbc..0000000000 --- a/branches/sca-java-2.0-M4/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java +++ /dev/null @@ -1,182 +0,0 @@ -/* - * 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 static org.apache.tuscany.sca.extensibility.ServiceHelper.newInstance; - -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; -import org.apache.tuscany.sca.extensibility.ServiceHelper; - -/** - * 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"); - } - ServiceHelper.start(extensionPoint); - - 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); - } - - /** - * 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); - if (extensionPointDeclaration != null) { - extensionPoint = newInstance(this, extensionPointDeclaration); - // Cache the loaded extension point - addExtensionPoint(extensionPoint, extensionPointDeclaration); - } - } catch (Throwable 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"); - } - - ServiceHelper.stop(extensionPoint); - - 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); - implemented.remove(LifeCycleListener.class); - 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 start() { - // Do nothing - } - - public void stop() { - // Get a unique map as an extension point may exist in the map by different keys - Map<LifeCycleListener, LifeCycleListener> map = new IdentityHashMap<LifeCycleListener, LifeCycleListener>(); - for (Object extp : extensionPoints.values()) { - if (extp instanceof LifeCycleListener) { - LifeCycleListener listener = (LifeCycleListener)extp; - map.put(listener, listener); - } - } - ServiceHelper.stop(map.values()); - extensionPoints.clear(); - } - -} |