001/**
002 *   GRANITE DATA SERVICES
003 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 *   This file is part of the Granite Data Services Platform.
006 *
007 *   Granite Data Services is free software; you can redistribute it and/or
008 *   modify it under the terms of the GNU Lesser General Public
009 *   License as published by the Free Software Foundation; either
010 *   version 2.1 of the License, or (at your option) any later version.
011 *
012 *   Granite Data Services is distributed in the hope that it will be useful,
013 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
014 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 *   General Public License for more details.
016 *
017 *   You should have received a copy of the GNU Lesser General Public
018 *   License along with this library; if not, write to the Free Software
019 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 *   USA, or see <http://www.gnu.org/licenses/>.
021 */
022package org.granite.tide.cdi;
023
024import java.lang.annotation.Annotation;
025import java.util.HashSet;
026import java.util.Set;
027
028import javax.enterprise.context.spi.CreationalContext;
029import javax.enterprise.inject.spi.Bean;
030import javax.enterprise.inject.spi.BeanManager;
031import javax.servlet.ServletContext;
032
033import org.granite.cdi.CDIUtils;
034import org.granite.cdi.GravityFactory;
035import org.granite.config.ConfigProvider;
036import org.granite.gravity.Gravity;
037import org.granite.logging.Logger;
038import org.granite.messaging.service.ServiceFactory;
039
040
041public class CDIConfigProvider implements ConfigProvider {
042
043    private static final Logger log = Logger.getLogger(CDIConfigProvider.class);
044
045        protected BeanManager beanManager;
046
047        public CDIConfigProvider(ServletContext servletContext) {
048                beanManager = CDIUtils.lookupBeanManager(servletContext);
049        }
050
051        public Boolean useTide() {
052                return true;
053        }
054
055        public String getType() {
056                return "server";
057        }
058
059        public Class<? extends ServiceFactory> getFactoryClass() {
060                return CDIServiceFactory.class;
061        }
062
063    @SuppressWarnings("unchecked")
064        public <T> T findInstance(Class<T> type) {
065                Set<Bean<?>> beans = beanManager.getBeans(type);
066                if (beans.size() == 1) {
067                        Bean<?> bean = beans.iterator().next();
068                        CreationalContext<?> cc = beanManager.createCreationalContext(bean);
069                        return (T)beanManager.getReference(bean, type, cc);
070                }
071                return null;
072        }
073
074        @SuppressWarnings("unchecked")
075        public <T> Set<T> findInstances(Class<T> type) {
076                Set<Bean<?>> beans = beanManager.getBeans(type);
077                Set<T> instances = new HashSet<T>(beans.size());
078                for (Bean<?> bean : beans) {
079                        CreationalContext<?> cc = beanManager.createCreationalContext(bean);
080                        instances.add((T)beanManager.getReference(bean, type, cc));
081                }
082                return instances;
083        }
084        
085        public Class<?>[] getTideInterfaces() {
086                return new Class<?>[] { Identity.class };
087        }
088
089        @SuppressWarnings("unchecked")
090        public Class<? extends Annotation>[] getTideAnnotations() {
091                return new Class[0];
092        }
093
094    @Override
095    public void initGravity(Gravity gravity) {
096        GravityFactory gravityFactory = findInstance(GravityFactory.class);
097        gravityFactory.setGravity(gravity);
098        log.info("Registered Gravity bean");
099    }
100}