org.springframework.cache.annotation.AnnotationCacheOperationSource Maven / Gradle / Ivy
/*
* Copyright 2002-2019 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.io.Serializable;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.Set;
import org.springframework.cache.interceptor.AbstractFallbackCacheOperationSource;
import org.springframework.cache.interceptor.CacheOperation;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* Implementation of the {@link org.springframework.cache.interceptor.CacheOperationSource
* CacheOperationSource} interface for working with caching metadata in annotation format.
*
* This class reads Spring's {@link Cacheable}, {@link CachePut} and {@link CacheEvict}
* annotations and exposes corresponding caching operation definition to Spring's cache
* infrastructure. This class may also serve as base class for a custom
* {@code CacheOperationSource}.
*
* @author Costin Leau
* @author Juergen Hoeller
* @author Stephane Nicoll
* @since 3.1
*/
@SuppressWarnings("serial")
public class AnnotationCacheOperationSource extends AbstractFallbackCacheOperationSource implements Serializable {
private final boolean publicMethodsOnly;
private final Set annotationParsers;
/**
* Create a default AnnotationCacheOperationSource, supporting public methods
* that carry the {@code Cacheable} and {@code CacheEvict} annotations.
*/
public AnnotationCacheOperationSource() {
this(true);
}
/**
* Create a default {@code AnnotationCacheOperationSource}, supporting public methods
* that carry the {@code Cacheable} and {@code CacheEvict} annotations.
* @param publicMethodsOnly whether to support only annotated public methods
* typically for use with proxy-based AOP), or protected/private methods as well
* (typically used with AspectJ class weaving)
*/
public AnnotationCacheOperationSource(boolean publicMethodsOnly) {
this.publicMethodsOnly = publicMethodsOnly;
this.annotationParsers = Collections.singleton(new SpringCacheAnnotationParser());
}
/**
* Create a custom AnnotationCacheOperationSource.
* @param annotationParser the CacheAnnotationParser to use
*/
public AnnotationCacheOperationSource(CacheAnnotationParser annotationParser) {
this.publicMethodsOnly = true;
Assert.notNull(annotationParser, "CacheAnnotationParser must not be null");
this.annotationParsers = Collections.singleton(annotationParser);
}
/**
* Create a custom AnnotationCacheOperationSource.
* @param annotationParsers the CacheAnnotationParser to use
*/
public AnnotationCacheOperationSource(CacheAnnotationParser... annotationParsers) {
this.publicMethodsOnly = true;
Assert.notEmpty(annotationParsers, "At least one CacheAnnotationParser needs to be specified");
this.annotationParsers = new LinkedHashSet<>(Arrays.asList(annotationParsers));
}
/**
* Create a custom AnnotationCacheOperationSource.
* @param annotationParsers the CacheAnnotationParser to use
*/
public AnnotationCacheOperationSource(Set annotationParsers) {
this.publicMethodsOnly = true;
Assert.notEmpty(annotationParsers, "At least one CacheAnnotationParser needs to be specified");
this.annotationParsers = annotationParsers;
}
@Override
public boolean isCandidateClass(Class targetClass) {
for (CacheAnnotationParser parser : this.annotationParsers) {
if (parser.isCandidateClass(targetClass)) {
return true;
}
}
return false;
}
@Override
@Nullable
protected Collection findCacheOperations(Class clazz) {
return determineCacheOperations(parser -> parser.parseCacheAnnotations(clazz));
}
@Override
@Nullable
protected Collection findCacheOperations(Method method) {
return determineCacheOperations(parser -> parser.parseCacheAnnotations(method));
}
/**
* Determine the cache operation(s) for the given {@link CacheOperationProvider}.
* This implementation delegates to configured
* {@link CacheAnnotationParser CacheAnnotationParsers}
* for parsing known annotations into Spring's metadata attribute class.
*
Can be overridden to support custom annotations that carry caching metadata.
* @param provider the cache operation provider to use
* @return the configured caching operations, or {@code null} if none found
*/
@Nullable
protected Collection determineCacheOperations(CacheOperationProvider provider) {
Collection ops = null;
for (CacheAnnotationParser parser : this.annotationParsers) {
Collection annOps = provider.getCacheOperations(parser);
if (annOps != null) {
if (ops == null) {
ops = annOps;
}
else {
Collection combined = new ArrayList<>(ops.size() + annOps.size());
combined.addAll(ops);
combined.addAll(annOps);
ops = combined;
}
}
}
return ops;
}
/**
* By default, only public methods can be made cacheable.
*/
@Override
protected boolean allowPublicMethodsOnly() {
return this.publicMethodsOnly;
}
@Override
public boolean equals(@Nullable Object other) {
if (this == other) {
return true;
}
if (!(other instanceof AnnotationCacheOperationSource)) {
return false;
}
AnnotationCacheOperationSource otherCos = (AnnotationCacheOperationSource) other;
return (this.annotationParsers.equals(otherCos.annotationParsers) &&
this.publicMethodsOnly == otherCos.publicMethodsOnly);
}
@Override
public int hashCode() {
return this.annotationParsers.hashCode();
}
/**
* Callback interface providing {@link CacheOperation} instance(s) based on
* a given {@link CacheAnnotationParser}.
*/
@FunctionalInterface
protected interface CacheOperationProvider {
/**
* Return the {@link CacheOperation} instance(s) provided by the specified parser.
* @param parser the parser to use
* @return the cache operations, or {@code null} if none found
*/
@Nullable
Collection getCacheOperations(CacheAnnotationParser parser);
}
}