| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.tuscany.sca.extensibility.equinox; |
| |
| import java.util.Dictionary; |
| import java.util.Hashtable; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry; |
| import org.apache.tuscany.sca.extensibility.ServiceDeclaration; |
| import org.apache.tuscany.sca.extensibility.ServiceDiscovery; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.BundleException; |
| import org.osgi.framework.ServiceReference; |
| import org.osgi.framework.ServiceRegistration; |
| |
| /** |
| * OSGi ServiceRegistry based extension point registry |
| */ |
| public class OSGiExtensionPointRegistry extends DefaultExtensionPointRegistry { |
| private Map<Class<?>, ServiceRegistration> registrations = new ConcurrentHashMap<Class<?>, ServiceRegistration>(); |
| private BundleContext bundleContext; |
| |
| public OSGiExtensionPointRegistry(BundleContext bundleContext) { |
| super(ServiceDiscovery.getInstance(new EquinoxServiceDiscoverer(bundleContext))); |
| this.bundleContext = bundleContext; |
| } |
| |
| @Override |
| protected void registerExtensionPoint(Class<?> extensionPointType, |
| Object extensionPoint, |
| ServiceDeclaration declaration) { |
| BundleContext context = bundleContext; |
| if (declaration instanceof EquinoxServiceDiscoverer.ServiceDeclarationImpl) { |
| EquinoxServiceDiscoverer.ServiceDeclarationImpl declarationImpl = |
| (EquinoxServiceDiscoverer.ServiceDeclarationImpl)declaration; |
| Bundle bundle = declarationImpl.getBundle(); |
| /** |
| * If this bundle is not in the STARTING, ACTIVE, or STOPPING states or this bundle |
| * is a fragment bundle, then this bundle has no valid BundleContext. This method will |
| * return null if this bundle has no valid BundleContext |
| */ |
| if ((bundle.getState() & (Bundle.ACTIVE | Bundle.STARTING)) == 0) { |
| try { |
| bundle.start(); |
| } catch (BundleException e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| context = bundle.getBundleContext(); |
| } |
| Dictionary<Object, Object> props = new Hashtable<Object, Object>(); |
| ServiceRegistration registration = context.registerService(extensionPointType.getName(), extensionPoint, props); |
| registrations.put(extensionPointType, registration); |
| super.registerExtensionPoint(extensionPointType, extensionPoint, declaration); |
| } |
| |
| @Override |
| protected void unregisterExtensionPoint(Class<?> i) { |
| ServiceRegistration registration = registrations.remove(i); |
| if (registration != null) { |
| try { |
| registration.unregister(); |
| } catch (IllegalStateException e) { |
| // The service has been unregistered, ignore it |
| } |
| } |
| super.unregisterExtensionPoint(i); |
| } |
| |
| @Override |
| public synchronized void stop() { |
| for (ServiceRegistration reg : registrations.values()) { |
| try { |
| ServiceReference ref = reg.getReference(); |
| if (ref != null) { |
| reg.unregister(); |
| } |
| } catch (IllegalStateException e) { |
| // Ignore it, the service has been unregistered when the owning bundle stops |
| } |
| } |
| registrations.clear(); |
| super.stop(); |
| } |
| |
| } |