spring AbstractKeyCacheInterceptor 源码
spring AbstractKeyCacheInterceptor 代码
文件路径：/spring-context-support/src/main/java/org/springframework/cache/jcache/interceptor/AbstractKeyCacheInterceptor.java
/*
* Copyright 2002-2018 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
*
* 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.lang.annotation.Annotation;
import javax.cache.annotation.CacheKeyInvocationContext;
import org.springframework.cache.interceptor.CacheErrorHandler;
import org.springframework.cache.interceptor.CacheOperationInvocationContext;
import org.springframework.cache.interceptor.KeyGenerator;
/**
* A base interceptor for JSR-107 key-based cache annotations.
*
* @author Stephane Nicoll
* @since 4.1
* @param <O> the operation type
* @param <A> the annotation type
*/
@SuppressWarnings("serial")
abstract class AbstractKeyCacheInterceptor<O extends AbstractJCacheKeyOperation<A>, A extends Annotation>
extends AbstractCacheInterceptor<O, A> {
protected AbstractKeyCacheInterceptor(CacheErrorHandler errorHandler) {
super(errorHandler);
}
/**
* Generate a key for the specified invocation.
* @param context the context of the invocation
* @return the key to use
*/
protected Object generateKey(CacheOperationInvocationContext<O> context) {
KeyGenerator keyGenerator = context.getOperation().getKeyGenerator();
Object key = keyGenerator.generate(context.getTarget(), context.getMethod(), context.getArgs());
if (logger.isTraceEnabled()) {
logger.trace("Computed cache key " + key + " for operation " + context.getOperation());
}
return key;
}
/**
* Create a {@link CacheKeyInvocationContext} based on the specified invocation.
* @param context the context of the invocation.
* @return the related {@code CacheKeyInvocationContext}
*/
protected CacheKeyInvocationContext<A> createCacheKeyInvocationContext(CacheOperationInvocationContext<O> context) {
return new DefaultCacheKeyInvocationContext<>(context.getOperation(), context.getTarget(), context.getArgs());
}
}
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