field protected com.alicp.jetcache.anno.support.ConfigProvider com.alicp.jetcache.autoconfigure.Abst_field configprovider in com.alicp.jetcache.autocon-优快云博客

本文解决了一个Spring Boot项目中JetCache的循环依赖问题。通过自定义配置类和创建新的JetCacheAutoConfiguration类，避免了原有配置类间的循环依赖，确保了项目的正常启动。

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项目运行环境：

SpringBoot 2.6.2

<dependency>
   <groupId>com.alicp.jetcache</groupId>
   <artifactId>jetcache-starter-redis-lettuce</artifactId>
   <version>2.6.2</version>
</dependency>

项目启动出现错误：

***************************
APPLICATION FAILED TO START
***************************

Description:

The dependencies of some of the beans in the application context form a cycle:

┌─────┐
|  com.alicp.jetcache.autoconfigure.CaffeineAutoConfiguration (field protected com.alicp.jetcache.anno.support.ConfigProvider com.alicp.jetcache.autoconfigure.AbstractCacheAutoInit.configProvider)
↑     ↓
|  springConfigProvider
└─────┘

产生原因：

JetCacheAutoConfiguration 中 @import({ ... })中相关的配置类，会先于JetCacheAutoConfiguration 内部的 SpringConfigProvider 和 GlobalCacheConfig 进行注入。主要是 BeanDependencyManager 注入引起
而 @import({ ... })中的类，例如，CaffeineAutoConfiguration他的基类 AbstractCacheAutoInit，又依赖于 SpringConfigProvider（AbstractCacheAutoInit类中注入SpringConfigProvider）
SpringConfigProvider 中，又依赖于 GlobalCacheConfig 的注入。
在JetCacheAutoConfiguration 中 GlobalCacheConfig 又引入的 SpringConfigProvider ，所以导致了循环

解决办法：

自己的代码中，新建一个 JetCacheConfiguration.class 将JetCacheAutoConfiguration 主要代码迁移至此类，不包括BeanDependencyManager。主要代码如下：

@Configuration
@EnableConfigurationProperties(JetCacheProperties.class)
@EnableCreateCacheAnnotation
public class JetCacheConfiguration {

    private static final Logger log = LoggerFactory.getLogger(JetCacheConfiguration.class);

    @PostConstruct
    public void postConstruct() {
        log.debug("[Herodotus] |- Plugin [Herodotus JetCache] Auto Configure.");
    }

    @Bean
    public AutoConfigureBeans autoConfigureBeans() {
        AutoConfigureBeans autoConfigureBeans = new AutoConfigureBeans();
        log.trace("[Herodotus] |- Bean [Auto Configure Beans] Auto Configure.");
        return autoConfigureBeans;
    }

    @Bean
    public GlobalCacheConfig globalCacheConfig(AutoConfigureBeans autoConfigureBeans, JetCacheProperties jetCacheProperties) {
        GlobalCacheConfig globalCacheConfig = new GlobalCacheConfig();
        globalCacheConfig.setHiddenPackages(jetCacheProperties.getHiddenPackages());
        globalCacheConfig.setStatIntervalMinutes(jetCacheProperties.getStatIntervalMinutes());
        globalCacheConfig.setAreaInCacheName(jetCacheProperties.isAreaInCacheName());
        globalCacheConfig.setPenetrationProtect(jetCacheProperties.isPenetrationProtect());
        globalCacheConfig.setEnableMethodCache(jetCacheProperties.isEnableMethodCache());
        globalCacheConfig.setLocalCacheBuilders(autoConfigureBeans.getLocalCacheBuilders());
        globalCacheConfig.setRemoteCacheBuilders(autoConfigureBeans.getRemoteCacheBuilders());
        log.trace("[Herodotus] |- Bean [Global Cache Config] Auto Configure.");
        return globalCacheConfig;
    }

    @Bean
    @ConditionalOnBean(GlobalCacheConfig.class)
    public ConfigProvider configProvider() {
        SpringConfigProvider springConfigProvider = new SpringConfigProvider();
        log.trace("[Herodotus] |- Bean [Spring Config Provider] Auto Configure.");
        return springConfigProvider;
    }
}

2.在自己的代码中，新建包 com.alicp.jetcache.autoconfigure，并在该包中新建一个同名的 JetCacheAutoConfiguration 类，这样就可以覆盖 jetcache-autoconfigure-2.6.0.jar 中的 JetCacheAutoConfiguration ，并删除其中的代码，就解决了循环依赖问题。新的JetCacheAutoConfiguration 代码如下：

@Configuration
@ConditionalOnClass(GlobalCacheConfig.class)
@Import({RedisAutoConfiguration.class,
        CaffeineAutoConfiguration.class,
        MockRemoteCacheAutoConfiguration.class,
        LinkedHashMapAutoConfiguration.class,
        RedisLettuceAutoConfiguration.class,
        RedisSpringDataAutoConfiguration.class})
public class JetCacheAutoConfiguration {

    public static final String GLOBAL_CACHE_CONFIG_NAME = "globalCacheConfig";

    private static final Logger log = LoggerFactory.getLogger(JetCacheAutoConfiguration.class);

    @PostConstruct
    public void postConstruct() {
        log.info("[Herodotus] |- Component [Custom JetCache] Auto Configure.");
    }
}