/*
* Copyright 2011-2014 the original author or authors.
*
* 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.springframework.data.mongodb.repository.cdi;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.UnsatisfiedResolutionException;
import javax.enterprise.inject.spi.AfterBeanDiscovery;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.ProcessBean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.data.repository.cdi.CdiRepositoryBean;
import org.springframework.data.repository.cdi.CdiRepositoryExtensionSupport;
/**
* CDI extension to export Mongo repositories.
*
* @author Oliver Gierke
* @author Mark Paluch
*/
public class MongoRepositoryExtension extends CdiRepositoryExtensionSupport {
private static final Logger LOG = LoggerFactory.getLogger(MongoRepositoryExtension.class);
private final Map<Set<Annotation>, Bean<MongoOperations>> mongoOperations = new HashMap<Set<Annotation>, Bean<MongoOperations>>();
public MongoRepositoryExtension() {
LOG.info("Activating CDI extension for Spring Data MongoDB repositories.");
}
@SuppressWarnings("unchecked")
<X> void processBean(@Observes ProcessBean<X> processBean) {
Bean<X> bean = processBean.getBean();
for (Type type : bean.getTypes()) {
if (type instanceof Class<?> && MongoOperations.class.isAssignableFrom((Class<?>) type)) {
if (LOG.isDebugEnabled()) {
LOG.debug(String.format("Discovered %s with qualifiers %s.", MongoOperations.class.getName(),
bean.getQualifiers()));
}
// Store the EntityManager bean using its qualifiers.
mongoOperations.put(new HashSet<Annotation>(bean.getQualifiers()), (Bean<MongoOperations>) bean);
}
}
}
void afterBeanDiscovery(@Observes AfterBeanDiscovery afterBeanDiscovery, BeanManager beanManager) {
for (Entry<Class<?>, Set<Annotation>> entry : getRepositoryTypes()) {
Class<?> repositoryType = entry.getKey();
Set<Annotation> qualifiers = entry.getValue();
// Create the bean representing the repository.
CdiRepositoryBean<?> repositoryBean = createRepositoryBean(repositoryType, qualifiers, beanManager);
if (LOG.isInfoEnabled()) {
LOG.info(String.format("Registering bean for %s with qualifiers %s.", repositoryType.getName(), qualifiers));
}
// Register the bean to the container.
registerBean(repositoryBean);
afterBeanDiscovery.addBean(repositoryBean);
}
}
/**
* Creates a {@link CdiRepositoryBean} for the repository of the given type.
*
* @param <T> the type of the repository.
* @param repositoryType the class representing the repository.
* @param qualifiers the qualifiers to be applied to the bean.
* @param beanManager the BeanManager instance.
* @return
*/
private <T> CdiRepositoryBean<T> createRepositoryBean(Class<T> repositoryType, Set<Annotation> qualifiers,
BeanManager beanManager) {
// Determine the MongoOperations bean which matches the qualifiers of the repository.
Bean<MongoOperations> mongoOperations = this.mongoOperations.get(qualifiers);
if (mongoOperations == null) {
throw new UnsatisfiedResolutionException(String.format("Unable to resolve a bean for '%s' with qualifiers %s.",
MongoOperations.class.getName(), qualifiers));
}
// Construct and return the repository bean.
return new MongoRepositoryBean<T>(mongoOperations, qualifiers, repositoryType, beanManager,
getCustomImplementationDetector());
}
}