5
मुझे spring cache abstraction के साथ एक jcache स्थापित करने में समस्या है।स्प्रिंग जावा कॉन्फ़िगरेशन में जेसीएच कैसे बनाएं?
@Configuration
@EnableCaching
public class CacheConfig {
@Bean(name = "caffeineCachingProvider")
public CachingProvider caffeineCachingProvider() {
return new CaffeineCachingProvider();
}
@Bean(name = "caffeineCacheManager")
public JCacheCacheManager getSpringCacheManager() {
CacheManager cacheManager = caffeineCachingProvider().getCacheManager();
CaffeineConfiguration<String, List<Product>> caffeineConfiguration = new CaffeineConfiguration<>();
caffeineConfiguration.setExpiryPolicyFactory(FactoryBuilder.factoryOf(new AccessedExpiryPolicy(new Duration(TimeUnit.MINUTES, 60))));
Cache<String, List<Product>> productCache = cacheManager.createCache("productCache", caffeineConfiguration);
JCacheCacheManager jCacheCacheManager = new JCacheCacheManager(cacheManager);
return jCacheCacheManager;
}
}
मैं Caffein जेसीएच के रूप में उपयोग कर रहा हूं। मैं समझ नहीं पा रहा हूं कि मैं क्या गलत कर रहा हूं। क्या आप समझाएंगे कि इसे ठीक से कैसे किया जाए?
मैं क्या हो रही है लाइन cacheManager.createCache(...)
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'caffeineCacheManager' defined in com.myapp.spring.config.CacheConfig: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cache.jcache.JCacheCacheManager]: Factory method 'getSpringCacheManager' threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1123)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1018)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
at javax.servlet.GenericServlet.init(GenericServlet.java:158)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1284)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1197)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1087)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5266)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5554)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:677)
at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1912)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cache.jcache.JCacheCacheManager]: Factory method 'getSpringCacheManager' threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)
... 34 more
Caused by: java.lang.NullPointerException
at com.github.benmanes.caffeine.jcache.CacheProxy.<init>(CacheProxy.java:109)
at com.github.benmanes.caffeine.jcache.CacheFactory$Builder.newCacheProxy(CacheFactory.java:160)
at com.github.benmanes.caffeine.jcache.CacheFactory$Builder.build(CacheFactory.java:145)
at com.github.benmanes.caffeine.jcache.CacheFactory.createCache(CacheFactory.java:82)
at com.github.benmanes.caffeine.jcache.CacheManagerImpl.lambda$createCache$0(CacheManagerImpl.java:98)
at com.github.benmanes.caffeine.jcache.CacheManagerImpl$$Lambda$23/388708304.apply(Unknown Source)
at java.util.concurrent.ConcurrentHashMap.compute(ConcurrentHashMap.java:1853)
at com.github.benmanes.caffeine.jcache.CacheManagerImpl.createCache(CacheManagerImpl.java:94)
at com.myapp.spring.config.CacheConfig.getSpringCacheManager(CacheConfig.java:55)
at com.myapp.spring.config.CacheConfig$$EnhancerBySpringCGLIB$$4f46e611.CGLIB$getSpringCacheManager$1(<generated>)
at com.myapp.spring.config.CacheConfig$$EnhancerBySpringCGLIB$$4f46e611$$FastClassBySpringCGLIB$$b70e5f67.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:355)
at com.myapp.spring.config.CacheConfig$$EnhancerBySpringCGLIB$$4f46e611.getSpringCacheManager(<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:497)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
... 35 more
के लिए धन्यवाद आपकी प्रतिक्रिया! अगले संस्करण में, '2.1.0',' कैफीन कॉन्फ़िगरेशन' 'स्टोर-बाय-वैल्यू' को अक्षम कर देगा और निर्माण पर 'जावासेरियलाइजेशन कोपीयर' पर कॉपियर सेट करेगा (यदि स्टोर-बाय-वैल्यू सक्षम है और कोई कॉपियर स्पष्ट रूप से सेट नहीं है)। यह मित्रवत प्रारंभिक सेटिंग्स होनी चाहिए ताकि अन्य उपयोगकर्ता इस अपवाद से आश्चर्यचकित न हों। –