org.springframework.cache.annotation.AbstractCachingConfiguration Maven / Gradle / Ivy
/*
* Copyright 2002-2020 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
*
* https://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.cache.annotation;
import java.util.Collection;
import java.util.function.Supplier;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.CacheManager;
import org.springframework.cache.interceptor.CacheErrorHandler;
import org.springframework.cache.interceptor.CacheResolver;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ImportAware;
import org.springframework.core.annotation.AnnotationAttributes;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.lang.Nullable;
import org.springframework.util.CollectionUtils;
/**
* Abstract base {@code @Configuration} class providing common structure
* for enabling Spring's annotation-driven cache management capability.
*
* @author Chris Beams
* @author Stephane Nicoll
* @author Juergen Hoeller
* @since 3.1
* @see EnableCaching
*/
@Configuration(proxyBeanMethods = false)
public abstract class AbstractCachingConfiguration implements ImportAware {
@Nullable
protected AnnotationAttributes enableCaching;
@Nullable
protected Supplier cacheManager;
@Nullable
protected Supplier cacheResolver;
@Nullable
protected Supplier keyGenerator;
@Nullable
protected Supplier errorHandler;
@Override
public void setImportMetadata(AnnotationMetadata importMetadata) {
this.enableCaching = AnnotationAttributes.fromMap(
importMetadata.getAnnotationAttributes(EnableCaching.class.getName(), false));
if (this.enableCaching == null) {
throw new IllegalArgumentException(
"@EnableCaching is not present on importing class " + importMetadata.getClassName());
}
}
@Autowired(required = false)
void setConfigurers(Collection configurers) {
if (CollectionUtils.isEmpty(configurers)) {
return;
}
if (configurers.size() > 1) {
throw new IllegalStateException(configurers.size() + " implementations of " +
"CachingConfigurer were found when only 1 was expected. " +
"Refactor the configuration such that CachingConfigurer is " +
"implemented only once or not at all.");
}
CachingConfigurer configurer = configurers.iterator().next();
useCachingConfigurer(configurer);
}
/**
* Extract the configuration from the nominated {@link CachingConfigurer}.
*/
protected void useCachingConfigurer(CachingConfigurer config) {
this.cacheManager = config::cacheManager;
this.cacheResolver = config::cacheResolver;
this.keyGenerator = config::keyGenerator;
this.errorHandler = config::errorHandler;
}
}