如何让Hibernate Cache自定义RegionFactory获取Spring注入的Bean？

自定义SpringRedisRegionFactory继承RegionFactoryTemplate，尝试通过SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this)注入RedisConnectionFactory，运行时抛出错误：

Current WebApplicationContext is not available for processing of SpringRedisRegionFactory: Make sure this class gets constructed in a Spring web application after the Spring WebApplicationContext has been initialized. Proceeding without injection.

此前在EntityListeners中使用相同注入方法可正常工作，但在RegionFactory中无效。

核心原因 #

RegionFactory的初始化时机早于Spring WebApplicationContext的就绪时间，或者该类未纳入Spring Bean生命周期管理，导致SpringBeanAutowiringSupport无法获取有效上下文完成注入。

解决方案 #

方案一：将RegionFactory纳入Spring Bean管理 #

让Spring直接管理SpringRedisRegionFactory实例，自动完成依赖注入：

1. 给类添加@Component注解，使其被Spring扫描并托管：

@Component
public class SpringRedisRegionFactory extends RegionFactoryTemplate {

  @Autowired
  private transient RedisConnectionFactory redisConnectionFactory;

  // 原有方法实现...
}

2. 配置Hibernate使用该Spring托管的RegionFactory（以Spring Boot为例）：

# application.properties
spring.jpa.properties.hibernate.cache.region.factory_class=com.yourpackage.SpringRedisRegionFactory

方案二：手动通过ApplicationContext工具类完成注入 #

如果无法将RegionFactory纳入Spring Bean管理，可通过静态持有上下文的工具类手动注入：

1. 创建ApplicationContext持有类：

@Component
public class ApplicationContextHolder implements ApplicationContextAware {
    private static ApplicationContext context;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        context = applicationContext;
    }

    public static ApplicationContext getContext() {
        return context;
    }
}

2. 修改registerNewStorageAccess方法，手动触发注入：

private DomainDataStorageAccess registerNewStorageAccess(final String regionName) {

    if (storageAccesses == null) {
        throw new IllegalStateException("prepareForUse was not executed yet");
    }

    ApplicationContext context = ApplicationContextHolder.getContext();
    if (context != null) {
        context.getAutowireCapableBeanFactory().autowireBean(this);
    } else {
        throw new IllegalStateException("ApplicationContext not initialized");
    }

    final var storageAccess = new SpringRedisStorageAccess(regionName, redisConnectionFactory);
    storageAccesses.add(storageAccess);
    return storageAccess;
}

方案三：利用RegionFactory的prepareForUse方法延迟注入 #

RegionFactoryTemplate的prepareForUse方法执行时机晚于初始化阶段，此时Spring上下文已就绪，可将注入逻辑移至该方法：

@Override
public void prepareForUse(DomainDataRegionBuildingContext buildingContext) {
    super.prepareForUse(buildingContext);
    // 在此处执行注入，确保上下文已初始化
    SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);
}

private DomainDataStorageAccess registerNewStorageAccess(final String regionName) {

    if (storageAccesses == null) {
        throw new IllegalStateException("prepareForUse was not executed yet");
    }

    // 无需再手动调用注入，prepareForUse已完成注入
    final var storageAccess = new SpringRedisStorageAccess(regionName, redisConnectionFactory);
    storageAccesses.add(storageAccess);
    return storageAccess;
}

内容的提问来源于stack exchange，提问作者Archimedes Trajano