/*
* Copyright 2012-2017 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.Collections;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.cache.CacheManager;
import org.springframework.core.ResolvableType;
/**
* Invokes the available {@link CacheManagerCustomizer} instances in the context for a
* given {@link CacheManager}.
*
* @author Stephane Nicoll
* @since 1.5.0
*/
public class CacheManagerCustomizers {
private static final Log logger = LogFactory.getLog(CacheManagerCustomizers.class);
private final List<CacheManagerCustomizer<?>> customizers;
public CacheManagerCustomizers(
List<? extends CacheManagerCustomizer<?>> customizers) {
this.customizers = (customizers != null ? new ArrayList<>(customizers)
: Collections.<CacheManagerCustomizer<?>>emptyList());
}
/**
* 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 <T> the type of cache manager
* @param cacheManager the cache manager to customize
* @return the cache manager
*/
public <T extends CacheManager> T customize(T cacheManager) {
for (CacheManagerCustomizer<?> customizer : this.customizers) {
Class<?> generic = ResolvableType
.forClass(CacheManagerCustomizer.class, customizer.getClass())
.resolveGeneric();
if (generic.isInstance(cacheManager)) {
customize(cacheManager, customizer);
}
}
return cacheManager;
}
@SuppressWarnings({ "unchecked", "rawtypes" })
private void customize(CacheManager cacheManager, CacheManagerCustomizer customizer) {
try {
customizer.customize(cacheManager);
}
catch (ClassCastException ex) {
// Possibly a lambda-defined customizer which we could not resolve the generic
// cache manager type for
if (logger.isDebugEnabled()) {
logger.debug(
"Non-matching cache manager type for customizer: " + customizer,
ex);
}
}
}
}