| /* |
| * Copyright 2008 Niclas Hedhman. |
| * |
| * Licensed 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.qi4j.library.jini.importer; |
| |
| import org.qi4j.api.common.Optional; |
| import org.qi4j.api.injection.scope.Service; |
| import org.qi4j.api.service.ImportedServiceDescriptor; |
| import org.qi4j.api.service.ServiceImporter; |
| import org.qi4j.api.service.ServiceImporterException; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Proxy; |
| |
| public class JiniImporter |
| implements ServiceImporter |
| { |
| @Optional @Service private JiniStatusService statusService; |
| |
| /** |
| * Import a service from Jini by looking creating a Proxy which holds the Lookup cache to the wanted Jini service. |
| * |
| * @param serviceDescriptor The service descriptor. |
| * @return a service instance |
| * @throws ServiceImporterException |
| */ |
| |
| public Object importService( ImportedServiceDescriptor serviceDescriptor ) |
| throws ServiceImporterException |
| { |
| final Class<?> serviceType = serviceDescriptor.type(); |
| JiniProxyHandler handler; |
| try |
| { |
| handler = new JiniProxyHandler( serviceType, statusService ); |
| } |
| catch( IOException e ) |
| { |
| throw new ServiceImporterException( "Unable to establish network.", e ); |
| } |
| Class[] type = new Class[]{ serviceType }; |
| return Proxy.newProxyInstance( JiniImporter.class.getClassLoader(), type, handler ); |
| } |
| |
| public boolean isActive( Object instance ) |
| { |
| JiniProxyHandler jiniHandler = (JiniProxyHandler) Proxy.getInvocationHandler( instance ); |
| return jiniHandler.isActive(); |
| } |
| |
| public boolean isAvailable( Object instance ) |
| { |
| JiniProxyHandler jiniHandler = (JiniProxyHandler) Proxy.getInvocationHandler( instance ); |
| return jiniHandler.isActive(); |
| } |
| } |