spring CacheResolverAdapter 源码
spring CacheResolverAdapter 代码
文件路径：/spring-context-support/src/main/java/org/springframework/cache/jcache/interceptor/CacheResolverAdapter.java
/*
* Copyright 2002-2021 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.jcache.interceptor;
import java.util.Collection;
import java.util.Collections;
import javax.cache.annotation.CacheInvocationContext;
import org.springframework.cache.Cache;
import org.springframework.cache.interceptor.CacheOperationInvocationContext;
import org.springframework.cache.interceptor.CacheResolver;
import org.springframework.cache.jcache.JCacheCache;
import org.springframework.util.Assert;
/**
* Spring's {@link CacheResolver} implementation that delegates to a standard
* JSR-107 {@link javax.cache.annotation.CacheResolver}.
* <p>Used internally to invoke user-based JSR-107 cache resolvers.
*
* @author Stephane Nicoll
* @since 4.1
*/
class CacheResolverAdapter implements CacheResolver {
private final javax.cache.annotation.CacheResolver target;
/**
* Create a new instance with the JSR-107 cache resolver to invoke.
*/
public CacheResolverAdapter(javax.cache.annotation.CacheResolver target) {
Assert.notNull(target, "JSR-107 CacheResolver is required");
this.target = target;
}
/**
* Return the underlying {@link javax.cache.annotation.CacheResolver}
* that this instance is using.
*/
protected javax.cache.annotation.CacheResolver getTarget() {
return this.target;
}
@Override
public Collection<? extends Cache> resolveCaches(CacheOperationInvocationContext<?> context) {
if (!(context instanceof CacheInvocationContext<?> cacheInvocationContext)) {
throw new IllegalStateException("Unexpected context " + context);
}
javax.cache.Cache<Object, Object> cache = this.target.resolveCache(cacheInvocationContext);
if (cache == null) {
throw new IllegalStateException("Could not resolve cache for " + context + " using " + this.target);
}
return Collections.singleton(new JCacheCache(cache));
}
}
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