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License: Apache License 2.0
jetcache's Issues
Can we add a field to support null for cache?
We currently is using jetcache for db query.
Can u give a hint of how to set @cached when I wanna support anti cache?(e.g. record not found in table)
这个组件在阿里哪些业务线使用啊？
如题
jetcache是否支持二级key？
redis支持field，即：key/value中的value可以是HashMap，且支持HashMap中value的TTL管理。
我看了上一个issue #10 中你的回复，你有提到jetcache定位是一个多级cache的集合组件，但这样势必会舍弃一些noSQL数据库本身的特性。
冒犯问一下，未来jetcache还会有哪些改进呢？我个人对jetcache项目比较感兴趣哈！
源码注释实在是少，可以针对这个源码的结构有一个结构图吗
整合spring boot1.4.2报错
刚开始以为一直是commons-pool和commons-pool2版本的冲突，排除掉jar后还是不行
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'redisAutoInit': Invocation of init method failed; nested exception is java.lang.NoSuchMethodError: redis.clients.jedis.JedisPool.<init>(Lorg/apache/commons/pool2/impl/GenericObjectPoolConfig;Ljava/lang/String;IILjava/lang/String;ILjava/lang/String;Z)V
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:136) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:408) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1575) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:751) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:761) ~[spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:371) ~[spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at com.cxytiandi.Application.main(Application.java:28) [classes/:na]
Caused by: java.lang.NoSuchMethodError: redis.clients.jedis.JedisPool.<init>(Lorg/apache/commons/pool2/impl/GenericObjectPoolConfig;Ljava/lang/String;IILjava/lang/String;ILjava/lang/String;Z)V
at com.alicp.jetcache.autoconfigure.RedisAutoConfiguration$RedisAutoInit.initCache(RedisAutoConfiguration.java:79) ~[jetcache-autoconfigure-2.2.0.Beta4.jar:na]
at com.alicp.jetcache.autoconfigure.AbstractCacheAutoInit.process(AbstractCacheAutoInit.java:73) ~[jetcache-autoconfigure-2.2.0.Beta4.jar:na]
at com.alicp.jetcache.autoconfigure.AbstractCacheAutoInit.init(AbstractCacheAutoInit.java:55) ~[jetcache-autoconfigure-2.2.0.Beta4.jar:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_45]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_45]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_45]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_45]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:365) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:310) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:133) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
... 16 common frames omitted
希望增加对Redis的Set,List数据结构支持的接口
中文版文档里yaml没有limit配置
英文版的有，这个会导致cache不生效，https://github.com/alibaba/jetcache/wiki/GettingStarted
@Autowired方式拿不到JedisPool
如果需要直接操作JedisPool，可以通过以下方式获取
@bean(name = "defaultPool")
@dependsOn(RedisAutoConfiguration.AUTO_INIT_BEAN_NAME)
public JedisPoolFactory defaultPool() {
return new JedisPoolFactory("remote.default");
}
然后可以直接使用@Autowired
private JedisPool defaultPool;
报错：
Field defaultPool in com.alicp.jetcache.autoconfigure.StarterTest required a bean of type 'redis.clients.jedis.JedisPool' that could not be found.
估计容器里，只有JedisPoolFactory 没有JedisPool
memcached支持？
需要的时候就做。
@Cached name use complex parameters
方法缓存支持复杂的参数类型，也支持多参数，它使用keyConvertor将参数数组转换成底层缓存可以支持的key类型，当前唯一可用的keyConvertor是fastjson。fastjson使用getter/setter来分析类，因此复杂的参数类型也需要是一个javabean。
能不能给个例子？？ 像下面这样写, 感觉不是使用json解析的,请给个例子吧...
aaaa是一个List入参
@cached(expire = 1000, name = "#aaaa", keyConvertor = KeyConvertor.FASTJSON)
Move jetcache's log from application's main log
These logs mixed with application's logs now. It's confused when debuging. Suggest to move jetcache's log to system.user/logs/jetcache.
在使用mybatis的dao层中使用@Cached注解,但未缓存结果.
想在项目中使用mybatis的dao层中使用@cached注解.测试并没有进行缓存方法的缓存结果.
例如在getUserByName方法上进行使用.
该如何使用?
解析容器名+端口形式配置错误
jetcache:
areaInCacheName: false
remote:
default:
type: redis.lettuce
keyConvertor: fastjson
uri:
- redis://grokzen__redis-cluster:7000
- redis://grokzen__redis-cluster:7001
- redis://grokzen__redis-cluster:7002
我的配置如图，在CI中redis集群地址为这种形式，但是在解析过程中出错，报错如下：
Suppressed: io.lettuce.core.RedisConnectionException: Unable to connect to grokzen__redis-cluster:7002:6379
应该是RedisLettuceAutoConfiguration中的RedisURI.create(URI.create(k.toString()))这个地方，URI解析出错，能有什么解决办法吗，谢谢
Roadmap
- golang version: implements jetcache core api
- python version: implements jetcache core api
- (2.X) java version: interoperable with golang and python version
- (3.X) java version: enhance Cache API and implement jsr-107 specification
缓存自动刷新对二级缓存不起作用
@Cached(name = ":message", key = "#id", expire = 2, cacheType = CacheType.BOTH)
@CacheRefresh(refresh = 1, stopRefreshAfterLastAccess = 1800)
public String getMessage(int id) {
log.info("get message {}", id);
return String.format("message %d is %s", id, System.currentTimeMillis());
}
缓存类型设置为local或者remote的时候，自动刷新都能起作用，但是设置为both的时候，缓存就没有自动刷新了，是不支持么？
jetcache是否支持no cache的配置?
某些条件下，可能没有redis或tair，那是否支持不开启二级缓存？或者有时为了测试方便连一级缓存也不开启？
是否可以使用jetcache的"自动刷新缓存"做应用的数据闭环?
比如商品详情页的依赖卖家数据(需要展示卖家信息), 而商品中心往往和卖家中心是两个独立的中心层服务. 我目前的想法通过jetcache把卖家的全量信息(数据量不大, 大概10w)都缓存到商品中心的本地内存中. 通过RefreshPolicy保证每十分钟和卖家中心同步. 这样即便卖家中心挂掉, 也不会导致商品详情页数据缺失(即便挂掉可以使用老的卖家数据).
从文档中, 我只看到用"自动刷新缓存"来避免缓存雪崩, 不知道贵司是否也有用jetcache解决数据闭环的问题?
没有考虑异步通知刷新缓存
JSR-107 Java Caching
Hi,
Why did you develop caching abstract api instead of using JSR107 - Java Caching Api?
fix putIfAbsent in CaffeineCache and LinkedHashMapCache
putIfAbsent fails when there is an expired entry in the cache.
有无对数据压缩的计划？
有无考虑过支持对大对象做数据压缩后再缓存？
cacheType为BOTH时，做为二级缓存，数据缓存本地和远程有优先级吗？
编写demo中，数据优先存在local中，并没有存在redis中
@Cached能否预防缓存击穿 和多级缓存设置不同的expire
能不能实现一个gson的keyConvertor？现在gson用的也挺多
考虑一下？gson好用啊
java.lang.ClassCastException: com.liuhaozzu.spring.data.investigation.entity.Customer cannot be cast to com.liuhaozzu.spring.data.investigation.entity.Customer
affected Version: 2.4.4
java.lang.ClassCastException: com.liuhaozzu.spring.data.investigation.entity.Customer cannot be cast to com.liuhaozzu.spring.data.investigation.entity.Customer
at com.sun.proxy.$Proxy129.getCustomer(Unknown Source) at com.liuhaozzu.spring.data.investigation.controller.ItemController.getCustomer(ItemController.java:37) 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.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [05-08 00:37:38 577 DEBUG] [http-nio-8080-exec-4] factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'org.springframework.boot.actuate.autoconfigure.EndpointWebMvcHypermediaManagementContextConfiguration$ActuatorEndpointLinksAdvice' [05-08 00:37:38 577 DEBUG] [http-nio-8080-exec-4] web.servlet.DispatcherServlet - Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling [05-08 00:37:38 577 DEBUG] [http-nio-8080-exec-4] jpa.support.OpenEntityManagerInViewInterceptor - Closing JPA EntityManager in OpenEntityManagerInViewInterceptor [05-08 00:37:38 577 DEBUG] [http-nio-8080-exec-4] orm.jpa.EntityManagerFactoryUtils - Closing JPA EntityManager [05-08 00:37:38 577 DEBUG] [http-nio-8080-exec-4] web.servlet.DispatcherServlet - Successfully completed request [05-08 00:37:38 577 DEBUG] [http-nio-8080-exec-4] web.filter.OrderedRequestContextFilter - Cleared thread-bound request context: org.apache.catalina.connector.RequestFacade@7de37eaf at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)
懒加载属性，读取缓存后执行序列化产生异常
当实体中存在懒加载属性的时候，读取缓存的对象后，进行序列化操作，会产生异常。
属性定义：
@OneToMany(mappedBy="topic",fetch = FetchType.LAZY)
public List<TopicTags> getTopicTags() {
return topicTags;
}
序列化操作：
```
@OverRide
public void serialize(Result value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonProcessingException {
jgen.writeStartObject();
jgen.writeStringField("result", value.getResult().toString());
jgen.writeNumberField("code", value.getCode());
jgen.writeStringField("reason", value.getReason());
jgen.writeFieldName("content");
jgen.writeStartArray();
for (Object obj : value.getContent()) {
objectWriter.writeValue(jgen, obj);
}
jgen.writeEndArray();
jgen.writeEndObject();
}
异常信息：
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.my.wxcop.entity.topic.Topic.topicTags, could not initialize proxy - no Session
at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:576)
at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:215)
at org.hibernate.collection.internal.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:156)
at org.hibernate.collection.internal.PersistentBag.size(PersistentBag.java:278)
at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:101)
at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:24)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:693)
at com.fasterxml.jackson.databind.ser.impl.FilteredBeanPropertyWriter$SingleView.serializeAsField(FilteredBeanPropertyWriter.java:67)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:675)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:157)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:130)
at com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1387)
at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:889)
at com.my.common.editor.ResultSerializer.serialize(ResultSerializer.java:59)
at com.my.common.editor.ResultSerializer.serialize(ResultSerializer.java:17)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:130)
at com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1387)
at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:889)
黄哥，Spring Aop 怎么配，大概的流程，谢谢
看了示例的测试代码，看了xml配置文件，还是没弄明白。
问下，大概 的步骤，谢谢啊
jetcache 能否提供对 J2Cache 的支持？
基于本地内存，不同的机器之间，同一个key对应的值，怎么同步更新？
基于本地内存，不同的机器之间，同一个key对应的值，怎么同步更新？
兼容事务回滚机制吗？
想用aspectj-maven-plugin进行静态织入需要如何配置？
想用aspectj-maven-plugin进行静态织入需要如何配置？
KeyGenerator
Hi,
I'm moving over from Spring cache to Jetcache but can't seem to figure out the best way to specify a global key generator.
In spring cache this was achieved by the code below:
@Bean
@Override
public KeyGenerator keyGenerator() {
return (o, method, params) -> {
StringBuilder sb = new StringBuilder();
sb.append(method.getDeclaringClass().getSimpleName());
sb.append("_");
sb.append(method.getName());
for (Object param : params) {
sb.append("_");
sb.append(param.toString());
}
return sb.toString();
};
}
The reason i need this is because i have some subclasses which need to have a different cache name hence the usage of method.getDeclaringClass().getSimpleName().
Can you maybe tell me what the easiest way to achieve this in Jetcache would be?
Thanks
ClassCastException cacheType=BOTH后，有时候会报错.
java.lang.ClassCastException: java.util.ArrayList cannot be cast to com.alicp.jetcache.CacheValueHolder
at com.alicp.jetcache.MultiLevelCache.do_GET(MultiLevelCache.java:57)
at com.alicp.jetcache.AbstractCache.GET(AbstractCache.java:58)
at com.alicp.jetcache.RefreshCache.GET(RefreshCache.java:107)
at com.alicp.jetcache.anno.method.CacheHandler.invokeWithCache(CacheHandler.java:131)
at com.alicp.jetcache.anno.method.CacheHandler.doInvoke(CacheHandler.java:106)
at com.alicp.jetcache.anno.method.CacheHandler.invoke(CacheHandler.java:99)
at com.alicp.jetcache.anno.aop.JetCacheInterceptor.invoke(JetCacheInterceptor.java:69)
Redis集群支持
目前JetCache使用jedis作为连接redis的客户端，配置一个redis.clients.util.Pool就可以（可以是它的子类JedisPool、JedisSentinelPool）。这样可以连基于Sentinel的主备Redis。
jedis自身声称对于Redis cluster specification的支持是“still under development”。连接集群需要使用JedisCluster，目前JetCache还没有对此进行支持。
做起来应该不麻烦，但是目前还没有这样的案例。
降低缓存失效时刻对数据库的压力
当缓存失效时，后端数据库的压力会比较大。
在JetCache的上个版本中，两级缓存的失效时间是不严格的，本地和远程可能不会在同一时刻失效，但这样超时时间就不是很精确，在2.0以后的版本中对此进行了矫正。
所以如果访问量特别大，现在就更加容易引起雪崩效应。需要有个机制来进行一下缓解，针对同一个key，至少一个jvm里面应该只有一个线程去加载。
方法缓存和Cache接口的computeIfAbsent都需要支持它。
考虑下Ehcache的堆外缓存集成，可以实现三级缓存
如题，本地堆内、本地堆外、磁盘
必须jdk1.8 ?
完成打包和集成
JetCache 2.1.2的代码已经在github上了，这个版本在内部发布过，是可用的。
现在还没有部署到**仓库，当第一次部署到**仓库的时候，版本号应该是2.1.3。
此外，持续集成工具travis-ci和codecov也应该集成进来。travis-ci现在已经ok了，但是codecov还没有完全搞好。实际上JetCache的单元测试覆盖率还是挺高的（在IDEA里面看），但因为它使用了一个专门的工程来放单元测试（为了共享一些测试类和资源），导致现在跑出来的覆盖率结果非常不体面，我甚至怀疑还能不能搞好。
当这些完成以后，readme需要做相关修改。最后再完成发布。
是否考虑支持下移除缓存？
spring cache没有支持ttl确实很不方便，但没有移除缓存更不方便。请问当缓存的对象发生了变化，怎么处理呢？
lettuce5 support
- support lettuce5 in JetCache 2.3.
- rename current lettuce 4 support artifact jetcache-redis-luttece, jetcache-starter-redis-luttece to jetcache-redis-lettuce4, jetcache-starter-redis-lettuce4.
lettuce 5 changed maven groupId and java package name, so lettuce 4 and lettuce 5 support can both exists.
redis服务器密码如何配置
redis服务器上如果有密码的话怎么进行配置？
json value序列化器
jetcache老版本中是有三个序列化器的：java、kryo、fastjson。
但是fastjson做序列化兼容性不是特别好，某次升级以后单元测试就无法通过了，最后把它废弃了。
现在默认的序列化器是性能最差，但是兼容性最好，大家也最熟悉的java序列化器。
我一直在想要不要找个json的序列化器回来，毕竟json可读性是最好的。
查询的数据为null就不缓存进去
有类似的功能么，比如说我查到的数据为null,就不缓存到库中，可以在注解中提供配置选项
请问一台机器本地缓存失效后通知集群所有机器失效本地缓存是在哪里实现的？要配置什么吗
请问@CacheInvalidate能删除多个缓存吗，或者清除同一个name下的缓存，类似于Spring cache的@CacheEvict 的allEntries参数？谢谢
黄哥，Cache API能否支持computeIfPresent(K key, Function<K,V> func)呢
黄哥，我在使用Cache<K,V>时，有一个更新已存在Key值的需求场景，如下图。不知道可否有相应接口支持原子性的操作：
在SpringBoot换下@PostConstruct方法中使用JetCache会出现问题
使用Spring Boot的情况下，在@PostConstruct方法中调用@cached方法会出现问题。
@Cached注解支持在class上使用
目前@Cached和@@CacheRefresh注解都只能在方法上使用，如果一个class中有很多方法需要缓存，它们的缓存配置基本都大致相同，比如area、name、cacheType、refresh等，这些配置在每个方法上都要写一遍，比较繁琐。
希望这两个注解也可以写在class上，作为class内各个方法缓存参数的默认值，method上的缓存参数优先级较高，可以覆盖class上设置的参数。
MultiLevelCache报"cannot be cast to com.alicp.jetcache.CacheValueHolder"
import com.alicp.jetcache.Cache;
import com.alicp.jetcache.MultiLevelCacheBuilder;
import com.alicp.jetcache.embedded.LinkedHashMapCacheBuilder;
import java.util.concurrent.TimeUnit;
/**
* Created by eros on 2017/9/9.
*/
public class MultiCacheTest {
public static void main(String args[]){
String s = multiLevelCache.get(1001L);
System.out.println(s);
}
static String loadFromDb(Long key) {
return "hahaha";
}
static Cache<Long, String> l1Cache = LinkedHashMapCacheBuilder.createLinkedHashMapCacheBuilder()
.limit(100)
.expireAfterWrite(200, TimeUnit.SECONDS)
// 这边调用的时候, 必须要使用强转
.loader(key -> loadFromDb((Long)key))
.buildCache();
static Cache<Long, String> l2Cache = LinkedHashMapCacheBuilder.createLinkedHashMapCacheBuilder()
.limit(100)
.expireAfterWrite(200, TimeUnit.SECONDS)
.loader(key -> loadFromDb((Long)key))
.buildCache();
static Cache<Long, String> multiLevelCache = MultiLevelCacheBuilder.createMultiLevelCacheBuilder()
.addCache(l1Cache, l2Cache)
.expireAfterWrite(100, TimeUnit.SECONDS)
.buildCache();
}
跑main函数的时候, 会报错
Exception in thread "main" java.lang.ClassCastException: java.lang.String cannot be cast to com.alicp.jetcache.CacheValueHolder
at com.alicp.jetcache.MultiLevelCache.do_GET(MultiLevelCache.java:57)
at com.alicp.jetcache.AbstractCache.GET(AbstractCache.java:58)
at com.alicp.jetcache.Cache.get(Cache.java:34)
at io.terminus.parana.category.service.MultiCacheTest.main(MultiCacheTest.java:15)
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 com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
value identity number配置
现在value做序列化的时候，在前面先写了4个字节作为标识符，昨天的一个提交使得decoder能够自动按标识符解码。
不过，如果需要使用jetcache和其他的程序同时读写一个key，就不应该写入identity number。这应该做成一个配置。
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