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Avoid early init of CacheManager
This commit restructures the Cache auto-configuration to avoid an early init on CacheManager (and potentially all its infrastructure). Rather than adding a dependency on the validator bean, this commit relies on the fact CacheAspectSupport checks if a CacheManager is available in the afterSingletonsInstantiated callback. In this case, a simple bean with a postconstruct callback is enough. Closes gh-13038
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@ -1,5 +1,5 @@
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/*
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* Copyright 2012-2016 the original author or authors.
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* Copyright 2012-2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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@ -18,14 +18,8 @@ package org.springframework.boot.autoconfigure.cache;
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import java.util.List;
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import javax.annotation.PostConstruct;
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import org.springframework.beans.BeansException;
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import org.springframework.beans.factory.InitializingBean;
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import org.springframework.beans.factory.ObjectProvider;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.config.BeanDefinition;
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import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
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import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
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import org.springframework.boot.autoconfigure.AutoConfigureAfter;
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import org.springframework.boot.autoconfigure.AutoConfigureBefore;
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import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
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@ -46,7 +40,6 @@ import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.context.annotation.Import;
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import org.springframework.context.annotation.ImportSelector;
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import org.springframework.context.annotation.Role;
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import org.springframework.core.type.AnnotationMetadata;
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import org.springframework.orm.jpa.AbstractEntityManagerFactoryBean;
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import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
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@ -73,8 +66,6 @@ import org.springframework.util.Assert;
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@Import(CacheConfigurationImportSelector.class)
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public class CacheAutoConfiguration {
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static final String VALIDATOR_BEAN_NAME = "cacheAutoConfigurationValidator";
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@Bean
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@ConditionalOnMissingBean
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public CacheManagerCustomizers cacheManagerCustomizers(
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@ -83,14 +74,10 @@ public class CacheAutoConfiguration {
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}
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@Bean
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@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
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public static CacheManagerValidatorPostProcessor cacheAutoConfigurationValidatorPostProcessor() {
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return new CacheManagerValidatorPostProcessor();
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}
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@Bean(name = VALIDATOR_BEAN_NAME)
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public CacheManagerValidator cacheAutoConfigurationValidator() {
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return new CacheManagerValidator();
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public CacheManagerValidator cacheAutoConfigurationValidator(
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CacheProperties cacheProperties,
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ObjectProvider<CacheManager> cacheManager) {
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return new CacheManagerValidator(cacheProperties, cacheManager);
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}
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@Configuration
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@ -105,50 +92,25 @@ public class CacheAutoConfiguration {
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}
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/**
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* {@link BeanFactoryPostProcessor} to ensure that the {@link CacheManagerValidator}
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* is triggered before {@link CacheAspectSupport} but without causing early
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* instantiation.
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*/
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static class CacheManagerValidatorPostProcessor implements BeanFactoryPostProcessor {
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@Override
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public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)
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throws BeansException {
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for (String name : beanFactory.getBeanNamesForType(CacheAspectSupport.class,
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false, false)) {
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BeanDefinition definition = beanFactory.getBeanDefinition(name);
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definition.setDependsOn(
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append(definition.getDependsOn(), VALIDATOR_BEAN_NAME));
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}
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}
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private String[] append(String[] array, String value) {
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String[] result = new String[array != null ? array.length + 1 : 1];
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if (array != null) {
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System.arraycopy(array, 0, result, 0, array.length);
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}
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result[result.length - 1] = value;
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return result;
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}
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}
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/**
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* Bean used to validate that a CacheManager exists and provide a more meaningful
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* exception.
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*/
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static class CacheManagerValidator {
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static class CacheManagerValidator implements InitializingBean {
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@Autowired
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private CacheProperties cacheProperties;
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private final CacheProperties cacheProperties;
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@Autowired(required = false)
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private CacheManager cacheManager;
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private final ObjectProvider<CacheManager> cacheManager;
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@PostConstruct
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public void checkHasCacheManager() {
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Assert.notNull(this.cacheManager,
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CacheManagerValidator(CacheProperties cacheProperties,
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ObjectProvider<CacheManager> cacheManager) {
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this.cacheProperties = cacheProperties;
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this.cacheManager = cacheManager;
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}
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@Override
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public void afterPropertiesSet() {
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Assert.notNull(this.cacheManager.getIfAvailable(),
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"No cache manager could "
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+ "be auto-configured, check your configuration (caching "
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+ "type is '" + this.cacheProperties.getType() + "')");
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@ -1,5 +1,5 @@
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/*
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* Copyright 2012-2017 the original author or authors.
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* Copyright 2012-2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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@ -51,9 +51,11 @@ import org.junit.Rule;
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import org.junit.Test;
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import org.junit.rules.ExpectedException;
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import org.springframework.beans.BeansException;
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import org.springframework.beans.DirectFieldAccessor;
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import org.springframework.beans.factory.BeanCreationException;
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import org.springframework.beans.factory.NoSuchBeanDefinitionException;
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import org.springframework.beans.factory.config.BeanPostProcessor;
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import org.springframework.boot.autoconfigure.cache.support.MockCachingProvider;
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import org.springframework.boot.autoconfigure.hazelcast.HazelcastAutoConfiguration;
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import org.springframework.boot.test.util.EnvironmentTestUtils;
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@ -770,6 +772,17 @@ public class CacheAutoConfigurationTests {
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validateCaffeineCacheWithStats();
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}
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@Test
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public void autoConfiguredCacheManagerCanBeSwapped() {
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load(CacheManagerPostProcessorConfiguration.class, "spring.cache.type=caffeine");
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validateCacheManager(SimpleCacheManager.class);
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CacheManagerPostProcessor postProcessor = this.context.getBean(
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CacheManagerPostProcessor.class);
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assertThat(postProcessor.cacheManagers).hasSize(1);
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assertThat(postProcessor.cacheManagers.get(0))
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.isInstanceOf(CaffeineCacheManager.class);
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}
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private void validateCaffeineCacheWithStats() {
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CaffeineCacheManager cacheManager = validateCacheManager(
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CaffeineCacheManager.class);
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@ -1164,4 +1177,37 @@ public class CacheAutoConfigurationTests {
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}
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@Configuration
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@EnableCaching
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static class CacheManagerPostProcessorConfiguration {
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@Bean
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public static BeanPostProcessor cacheManagerBeanPostProcessor() {
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return new CacheManagerPostProcessor();
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}
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}
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private static class CacheManagerPostProcessor implements BeanPostProcessor {
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private final List<CacheManager> cacheManagers = new ArrayList<CacheManager>();
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@Override
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public Object postProcessBeforeInitialization(Object bean,
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String beanName) throws BeansException {
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return bean;
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}
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@Override
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public Object postProcessAfterInitialization(Object bean,
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String beanName) throws BeansException {
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if (bean instanceof CacheManager) {
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this.cacheManagers.add((CacheManager) bean);
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return new SimpleCacheManager();
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}
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return bean;
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}
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}
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}
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