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/*
* Copyright 2016-2018 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.redis.repository.cdi;
import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;
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.keyvalue.core.KeyValueOperations;
import org.springframework.data.redis.core.RedisKeyValueAdapter;
import org.springframework.data.redis.core.RedisKeyValueTemplate;
import org.springframework.data.redis.core.RedisOperations;
import org.springframework.data.repository.cdi.CdiRepositoryBean;
import org.springframework.data.repository.cdi.CdiRepositoryExtensionSupport;
/**
* CDI extension to export Redis repositories. This extension enables Redis
* {@link org.springframework.data.repository.Repository} support. It requires either a {@link RedisKeyValueTemplate} or a
* {@link RedisOperations} bean. If no {@link RedisKeyValueTemplate} or {@link RedisKeyValueAdapter} are provided by the
* user, the extension creates own managed beans.
*
* @author Mark Paluch
*/
public class RedisRepositoryExtension extends CdiRepositoryExtensionSupport {
private static final Logger LOG = LoggerFactory.getLogger(RedisRepositoryExtension.class);
private final Map, Bean> redisKeyValueAdapters = new HashMap<>();
private final Map, Bean> redisKeyValueTemplates = new HashMap<>();
private final Map, Bean>> redisOperations = new HashMap<>();
public RedisRepositoryExtension() {
LOG.info("Activating CDI extension for Spring Data Redis repositories.");
}
/**
* Pick up existing bean definitions that are required for a Repository to work.
*
* @param processBean
* @param
*/
@SuppressWarnings("unchecked")
void processBean(@Observes ProcessBean processBean) {
Bean bean = processBean.getBean();
for (Type type : bean.getTypes()) {
Type beanType = type;
if (beanType instanceof ParameterizedType) {
beanType = ((ParameterizedType) beanType).getRawType();
}
if (beanType instanceof Class && RedisKeyValueTemplate.class.isAssignableFrom((Class) beanType)) {
if (LOG.isDebugEnabled()) {
LOG.debug(String.format("Discovered %s with qualifiers %s.", RedisKeyValueTemplate.class.getName(),
bean.getQualifiers()));
}
// Store the Key-Value Templates bean using its qualifiers.
redisKeyValueTemplates.put(new HashSet<>(bean.getQualifiers()), (Bean) bean);
}
if (beanType instanceof Class && RedisKeyValueAdapter.class.isAssignableFrom((Class) beanType)) {
if (LOG.isDebugEnabled()) {
LOG.debug(String.format("Discovered %s with qualifiers %s.", RedisKeyValueAdapter.class.getName(),
bean.getQualifiers()));
}
// Store the RedisKeyValueAdapter bean using its qualifiers.
redisKeyValueAdapters.put(new HashSet<>(bean.getQualifiers()), (Bean) bean);
}
if (beanType instanceof Class && RedisOperations.class.isAssignableFrom((Class) beanType)) {
if (LOG.isDebugEnabled()) {
LOG.debug(String.format("Discovered %s with qualifiers %s.", RedisOperations.class.getName(),
bean.getQualifiers()));
}
// Store the RedisOperations bean using its qualifiers.
redisOperations.put(new HashSet<>(bean.getQualifiers()), (Bean>) bean);
}
}
}
void afterBeanDiscovery(@Observes AfterBeanDiscovery afterBeanDiscovery, BeanManager beanManager) {
registerDependenciesIfNecessary(afterBeanDiscovery, beanManager);
for (Entry, Set> entry : getRepositoryTypes()) {
Class repositoryType = entry.getKey();
Set 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);
}
}
/**
* Register {@link RedisKeyValueAdapter} and {@link RedisKeyValueTemplate} if these beans are not provided by the CDI
* application.
*
* @param afterBeanDiscovery
* @param beanManager
*/
private void registerDependenciesIfNecessary(@Observes AfterBeanDiscovery afterBeanDiscovery,
BeanManager beanManager) {
for (Entry, Set> entry : getRepositoryTypes()) {
Set qualifiers = entry.getValue();
if (!redisKeyValueAdapters.containsKey(qualifiers)) {
if (LOG.isInfoEnabled()) {
LOG.info(String.format("Registering bean for %s with qualifiers %s.", RedisKeyValueAdapter.class.getName(),
qualifiers));
}
RedisKeyValueAdapterBean redisKeyValueAdapterBean = createRedisKeyValueAdapterBean(qualifiers, beanManager);
redisKeyValueAdapters.put(qualifiers, redisKeyValueAdapterBean);
afterBeanDiscovery.addBean(redisKeyValueAdapterBean);
}
if (!redisKeyValueTemplates.containsKey(qualifiers)) {
if (LOG.isInfoEnabled()) {
LOG.info(String.format("Registering bean for %s with qualifiers %s.", RedisKeyValueTemplate.class.getName(),
qualifiers));
}
RedisKeyValueTemplateBean redisKeyValueTemplateBean = createRedisKeyValueTemplateBean(qualifiers, beanManager);
redisKeyValueTemplates.put(qualifiers, redisKeyValueTemplateBean);
afterBeanDiscovery.addBean(redisKeyValueTemplateBean);
}
}
}
/**
* Creates a {@link CdiRepositoryBean} for the repository of the given type, requires a {@link KeyValueOperations}
* bean with the same qualifiers.
*
* @param 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 CdiRepositoryBean createRepositoryBean(Class repositoryType, Set qualifiers,
BeanManager beanManager) {
// Determine the KeyValueOperations bean which matches the qualifiers of the repository.
Bean redisKeyValueTemplate = this.redisKeyValueTemplates.get(qualifiers);
if (redisKeyValueTemplate == null) {
throw new UnsatisfiedResolutionException(String.format("Unable to resolve a bean for '%s' with qualifiers %s.",
RedisKeyValueTemplate.class.getName(), qualifiers));
}
// Construct and return the repository bean.
return new RedisRepositoryBean<>(redisKeyValueTemplate, qualifiers, repositoryType, beanManager,
getCustomImplementationDetector());
}
/**
* Creates a {@link RedisKeyValueAdapterBean}, requires a {@link RedisOperations} bean with the same qualifiers.
*
* @param qualifiers the qualifiers to be applied to the bean.
* @param beanManager the BeanManager instance.
* @return
*/
private RedisKeyValueAdapterBean createRedisKeyValueAdapterBean(Set qualifiers, BeanManager beanManager) {
// Determine the RedisOperations bean which matches the qualifiers of the repository.
Bean> redisOperationsBean = this.redisOperations.get(qualifiers);
if (redisOperationsBean == null) {
throw new UnsatisfiedResolutionException(String.format("Unable to resolve a bean for '%s' with qualifiers %s.",
RedisOperations.class.getName(), qualifiers));
}
// Construct and return the repository bean.
return new RedisKeyValueAdapterBean(redisOperationsBean, qualifiers, beanManager);
}
/**
* Creates a {@link RedisKeyValueTemplateBean}, requires a {@link RedisKeyValueAdapter} bean with the same qualifiers.
*
* @param qualifiers the qualifiers to be applied to the bean.
* @param beanManager the BeanManager instance.
* @return
*/
private RedisKeyValueTemplateBean createRedisKeyValueTemplateBean(Set qualifiers,
BeanManager beanManager) {
// Determine the RedisKeyValueAdapter bean which matches the qualifiers of the repository.
Bean redisKeyValueAdapterBean = this.redisKeyValueAdapters.get(qualifiers);
if (redisKeyValueAdapterBean == null) {
throw new UnsatisfiedResolutionException(String.format("Unable to resolve a bean for '%s' with qualifiers %s.",
RedisKeyValueAdapter.class.getName(), qualifiers));
}
// Construct and return the repository bean.
return new RedisKeyValueTemplateBean(redisKeyValueAdapterBean, qualifiers, beanManager);
}
}
