nested exception is java.lang.IllegalStateException: refreshAfterWrite requires a LoadingCache 异常解决

用户头像
谙忆
关注
发布于: 2020 年 08 月 07 日

nested exception is java.lang.IllegalStateException: refreshAfterWrite requires a LoadingCache异常解决



问题描述:

SpringBoot项目使用Caffeine缓存,出现如下异常信息:



Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cache' defined in class path resource [com/copyfuture/web/copyfutureweb/configurer/CacheConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.github.benmanes.caffeine.cache.Cache]: Factory method 'cache' threw exception; nested exception is java.lang.IllegalStateException: refreshAfterWrite requires a LoadingCache
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:607)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1305)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1144)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:849)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:127)
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99)
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:117)
... 24 more
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.github.benmanes.caffeine.cache.Cache]: Factory method 'cache' threw exception; nested exception is java.lang.IllegalStateException: refreshAfterWrite requires a LoadingCache
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622)
... 42 more
Caused by: java.lang.IllegalStateException: refreshAfterWrite requires a LoadingCache
at com.github.benmanes.caffeine.cache.Caffeine.requireState(Caffeine.java:194)
at com.github.benmanes.caffeine.cache.Caffeine.requireNonLoadingCache(Caffeine.java:1015)
at com.github.benmanes.caffeine.cache.Caffeine.build(Caffeine.java:921)
at com.copyfuture.web.copyfutureweb.configurer.CacheConfig.cache(CacheConfig.java:58)
at com.copyfuture.web.copyfutureweb.configurer.CacheConfig$$EnhancerBySpringCGLIB$$600e6612.CGLIB$cache$0(<generated>)
at com.copyfuture.web.copyfutureweb.configurer.CacheConfig$$EnhancerBySpringCGLIB$$600e6612$$FastClassBySpringCGLIB$$ac98c0d2.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363)
at com.copyfuture.web.copyfutureweb.configurer.CacheConfig$$EnhancerBySpringCGLIB$$600e6612.cache(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
... 43 more

123456789101112131415161718192021222324252627282930313233343536373839404142



关键信息:



Factory method 'cache' threw exception; nested exception is java.lang.IllegalStateException: refreshAfterWrite requires a LoadingCache
1



原因



因为我使用的是refreshAfterWrite配置。



必须指定一个CacheLoader。不用该配置则无需这个bean,如上所述,该CacheLoader将关联被该缓存管理器管理的所有缓存,所以必须定义为CacheLoader<Object, Object>,自动配置将忽略所有泛型类型。



解决方案



  1. 在构建LoadingCache对象的时候 build()方法中指定过期之后的加载策略方法



代码:



public class CacheConfig {


/**
* 相当于在构建LoadingCache对象的时候 build()方法中指定过期之后的加载策略方法
* 必须要指定这个Bean,refreshAfterWrite=60s属性才生效
* @return
*/
@Bean
public CacheLoader<String, Object> cacheLoader() {
CacheLoader<String, Object> cacheLoader = new CacheLoader<String, Object>() {
@Override
public Object load(String key) throws Exception {
return null;
}
// 重写这个方法将oldValue值返回回去,进而刷新缓存
@Override
public Object reload(String key, Object oldValue) throws Exception {
return oldValue;
}
};
return cacheLoader;
}

@Bean
public Cache<String, Object> cache(CacheLoader<String, Object> cacheLoader) {
return Caffeine.newBuilder()
// 创建缓存或者最近一次更新缓存后经过固定的时间间隔,刷新缓存 最后一次写入后经过固定时间过期
.refreshAfterWrite(3600L, TimeUnit.SECONDS)
// 初始的缓存空间大小
.initialCapacity(100)
// 缓存的最大条数
.maximumSize(100000)
//软引用
.softValues()
.build(cacheLoader);
}
}
1234567891011121314151617181920212223242526272829303132333435363738



其中CacheLoader必须要有,在cache方法中进行指定过期之后的加载策略方式,也就是build(cacheLoader)。



作者:谙忆

地址:https://chenhx.blog.csdn.net/



发布于: 2020 年 08 月 07 日 阅读数: 21
用户头像

谙忆

关注

还未添加个人签名 2020.02.07 加入

还未添加个人简介

评论

发布
暂无评论
nested exception is java.lang.IllegalStateException: refreshAfterWrite requires a LoadingCache异常解决