org.springframework.boot.autoconfigure.cache.CacheManagerCustomizers Maven / Gradle / Ivy
/*
* Copyright 2012-2016 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.boot.autoconfigure.cache;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactoryUtils;
import org.springframework.cache.CacheManager;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.GenericTypeResolver;
import org.springframework.core.annotation.AnnotationAwareOrderComparator;
/**
* Invokes the available {@link CacheManagerCustomizer} instances in the context for a
* given {@link CacheManager}.
*
* @author Stephane Nicoll
*/
class CacheManagerCustomizers implements ApplicationContextAware {
private ConfigurableApplicationContext applicationContext;
/**
* Customize the specified {@link CacheManager}. Locates all
* {@link CacheManagerCustomizer} beans able to handle the specified instance and
* invoke {@link CacheManagerCustomizer#customize(CacheManager)} on them.
* @param the type of cache manager
* @param cacheManager the cache manager to customize
* @return the cache manager
*/
public T customize(T cacheManager) {
List> customizers = findCustomizers(
cacheManager);
AnnotationAwareOrderComparator.sort(customizers);
for (CacheManagerCustomizer customizer : customizers) {
customizer.customize(cacheManager);
}
return cacheManager;
}
@SuppressWarnings({ "unchecked", "rawtypes" })
private List> findCustomizers(
CacheManager cacheManager) {
if (this.applicationContext == null) {
return Collections.emptyList();
}
Class cacheManagerClass = cacheManager.getClass();
List> customizers = new ArrayList>();
for (CacheManagerCustomizer customizer : getBeans(CacheManagerCustomizer.class)) {
if (canCustomize(customizer, cacheManagerClass)) {
customizers.add(customizer);
}
}
return customizers;
}
private Collection getBeans(Class type) {
return BeanFactoryUtils.beansOfTypeIncludingAncestors(
this.applicationContext.getBeanFactory(), type).values();
}
private boolean canCustomize(CacheManagerCustomizer customizer,
Class cacheManagerClass) {
Class target = GenericTypeResolver.resolveTypeArgument(customizer.getClass(),
CacheManagerCustomizer.class);
return (target == null || target.isAssignableFrom(cacheManagerClass));
}
@Override
public void setApplicationContext(ApplicationContext applicationContext)
throws BeansException {
if (applicationContext instanceof ConfigurableApplicationContext) {
this.applicationContext = (ConfigurableApplicationContext) applicationContext;
}
}
}