| /* |
| * 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.polygene.library.osgi; |
| |
| import java.lang.reflect.Type; |
| import java.util.Dictionary; |
| import java.util.stream.Stream; |
| import org.apache.polygene.api.activation.ActivatorAdapter; |
| import org.apache.polygene.api.activation.Activators; |
| import org.apache.polygene.api.identity.HasIdentity; |
| import org.apache.polygene.api.injection.scope.Structure; |
| import org.apache.polygene.api.injection.scope.Uses; |
| import org.apache.polygene.api.mixin.Mixins; |
| import org.apache.polygene.api.service.ServiceDescriptor; |
| import org.apache.polygene.api.service.ServiceReference; |
| import org.apache.polygene.api.structure.Module; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.ServiceRegistration; |
| |
| import static org.apache.polygene.api.util.Classes.toClassName; |
| import static org.apache.polygene.api.util.Classes.typesOf; |
| |
| /** |
| * Service Fragment providing OSGi support. |
| */ |
| @Mixins( OSGiEnabledService.OSGiEnabledServiceMixin.class ) |
| @Activators( OSGiEnabledService.Activator.class ) |
| public interface OSGiEnabledService extends HasIdentity |
| { |
| void registerServices() |
| throws Exception; |
| |
| void unregisterServices() |
| throws Exception; |
| |
| class Activator |
| extends ActivatorAdapter<ServiceReference<OSGiEnabledService>> |
| { |
| |
| @Override |
| public void afterActivation( ServiceReference<OSGiEnabledService> activated ) |
| throws Exception |
| { |
| activated.get().registerServices(); |
| } |
| |
| @Override |
| public void beforePassivation( ServiceReference<OSGiEnabledService> passivating ) |
| throws Exception |
| { |
| passivating.get().unregisterServices(); |
| } |
| } |
| |
| abstract class OSGiEnabledServiceMixin |
| implements OSGiEnabledService |
| { |
| @Uses |
| ServiceDescriptor descriptor; |
| |
| @Structure |
| private Module module; |
| |
| private ServiceRegistration registration; |
| |
| @Override |
| public void registerServices() |
| throws Exception |
| { |
| BundleContext context = descriptor.metaInfo( BundleContext.class ); |
| if( context == null ) |
| { |
| return; |
| } |
| module.findServices( descriptor.types().findFirst().orElse( null ) ).forEach( |
| ref -> { |
| if( ref.identity().equals( identity().get() ) ) |
| { |
| Stream<? extends Type> classesSet = descriptor.types(); |
| Dictionary properties = descriptor.metaInfo( Dictionary.class ); |
| String[] clazzes = fetchInterfacesImplemented( classesSet ); |
| registration = context.registerService( clazzes, ref.get(), properties ); |
| } |
| } |
| ); |
| } |
| |
| private String[] fetchInterfacesImplemented( Stream<? extends Type> classesSet ) |
| { |
| return typesOf( classesSet ).map( toClassName() ).toArray( String[]::new ); |
| } |
| |
| @Override |
| public void unregisterServices() |
| throws Exception |
| { |
| if( registration != null ) |
| { |
| registration.unregister(); |
| registration = null; |
| } |
| } |
| } |
| } |