Spring Module---cache

本文介绍如何利用Spring模块进行缓存管理。通过AOP方式实现缓存读取与更新,使用XXCacheFacade进行缓存操作,并介绍了MethodMapCachingInterceptor的作用及配置方法。
项目需要缓存,google了一下,发现spring module有现成的东西可用,随即拿来看看。发现还是比较好用的。
改cache采用了aop的方式进行cache的写入和刷出。使用spring风格,上手容易。
系统负载不高,因此对于该缓存方法的性能等等不做评价,目前满足需要。
使用方法:
有这么几个概念需要提前知道1.XXCacheFacade,比如如果是oscache,那么XX就是oscachefacade.该类负责缓存的写入和刷出
[code]
<bean id="oscacheFacade" class="org.springmodules.cache.provider.oscache.OsCacheFacade">
<property name="failQuietlyEnabled" value="true"/>
<property name="cacheManager">
<bean id="oscacheManager" class="org.springmodules.cache.provider.oscache.OsCacheManagerFactoryBean"/>
</property>
</bean>
[/code]
里面的cacheManager必须要有,改类负责提供底层具体的cache实现,比如oscache或者EHcache等。
2.MethodMapCachingInterceptor这个拦截器是官方提供的同类型的拦截器之一,根据方法名,参数匹配拦截。
[code]
<bean id="cachingInterceptor001" class="org.springmodules.cache.interceptor.caching.MethodMapCachingInterceptor">
<property name="cacheProviderFacade" ref="oscacheFacade"/>
<property name="cachingModels">
<props>
<prop key="com.company.jncz.TestItIF.get*">groups=aa;refreshPeriod=10</prop>
<prop key="com.company.jncz.TestItIF.load*">groups=bb;refreshPeriod=10</prop>
</props>
</property>
</bean>
[/code]
注意cachingModels。有两种方式写法,一种是上面看到的使用props另一种是使用Map.在有些情况下只能使用Map方式,下面解释
[code]
<map>
<entry key="com.company.jncz.TestIt.get*">
<ref local="oscacheCachingModel"/>
</entry>
</map>
[/code]
[code]
<bean id="oscacheCachingModel" class="org.springmodules.cache.provider.oscache.OsCacheCachingModel">
<property name="groups">
<list>
<value>aa</value>
<value>bb</value>
</list>
</property>
<property name="refreshPeriod" value="10"/>
</bean>
[/code]
尤其当groups(对于oscache来说是groups)的值不止一个的时候,就需要使用map的方式。
否则不生效(也许还有什么我没有注意到).另外需要注意的是对于model来说他的key很重要。有以下需要注意:如果AImpl是A接口的实现类,而且你在其他地方使用时都是用A接口来声明的,那么key就必须写成接口的全限定名比如:com.company.jncz.A.getXX,否则无法识别。

对于与cachingModel相对应的flushingModel写法是类似的,参考api很容易写出来。

最后
[code]
<bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
<property name="beanNames">
<value>*Service</value>
</property>
<property name="interceptorNames">
<list>
<value>cachingInterceptor001</value>
<value>flushingInterceptor001</value>
</list>
</property>
</bean>
<bean id="testService" class="com.company.jncz.TestItStub"/>
[/code]
这些不做介绍。
总之比较简单。这两天感冒,昏昏沉沉,不知道有没有表达清楚。。。。


自己看了一眼,的确没说清楚,要清楚的几个概念是cacheFacade.CachingModel.FlushingModel.CachingInterceptor.FlushingInterceptor.这些算是比较重要的。其他aop内容略。caching拦截器拦截某方法,根据cachingModel定义的规则由cacheFacade将之放入cache。flushing拦截器拦截到某方法,根据flushingModel定义的规则由cacheFacade将对应的cache清除。嗯,基本上流程就这样子了。
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"C:\Program Files\Java\jdk-11\bin\java.exe" -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-Dmanagement.endpoints.jmx.exposure.include=*" "-javaagent:D:\Program Files\JetBrains\IntelliJ IDEA 2025.1\lib\idea_rt.jar=63305" -Dfile.encoding=UTF-8 -classpath 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lassmate-1.5.1.jar com.shop.vip.mall.MallSearchApplication . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.3.12.RELEASE) *************************** APPLICATION FAILED TO START *************************** Description: An attempt was made to call a method that does not exist. The attempt was made from the following location: org.springframework.boot.autoconfigure.data.elasticsearch.ElasticsearchDataConfiguration$BaseConfiguration.elasticsearchConverter(ElasticsearchDataConfiguration.java:76) The following method did not exist: org.springframework.data.elasticsearch.core.convert.MappingElasticsearchConverter.setConversions(Lorg/springframework/data/convert/CustomConversions;)V The method's class, org.springframework.data.elasticsearch.core.convert.MappingElasticsearchConverter, is available from the following locations: jar:file:/D:/Repository/maven-repository/org/springframework/data/spring-data-elasticsearch/3.2.9.RELEASE/spring-data-elasticsearch-3.2.9.RELEASE.jar!/org/springframework/data/elasticsearch/core/convert/MappingElasticsearchConverter.class The class hierarchy was loaded from the following locations: org.springframework.data.elasticsearch.core.convert.MappingElasticsearchConverter: file:/D:/Repository/maven-repository/org/springframework/data/spring-data-elasticsearch/3.2.9.RELEASE/spring-data-elasticsearch-3.2.9.RELEASE.jar Action: Correct the classpath of your application so that it contains a single, compatible version of org.springframework.data.elasticsearch.core.convert.MappingElasticsearchConverter Process finished with exit code 1
06-13
### 解决方案 在Spring Boot 2.3.12.RELEASE与spring-data-elasticsearch 3.2.9.RELEASE的集成中,出现`MappingElasticsearchConverter.setConversions`方法缺失的问题,主要原因是版本不兼容或依赖项配置错误。以下是解决该问题的详细分析和解决方案。 #### 1. 版本兼容性分析 Spring Boot 2.3.12.RELEASE默认支持spring-data-elasticsearch 3.2.x系列版本[^1]。然而,`MappingElasticsearchConverter.setConversions`方法是在spring-data-elasticsearch 4.x版本中引入的功能。因此,在使用spring-data-elasticsearch 3.2.9.RELEASE时,此方法并不存在。 为了解决这个问题,可以采取以下两种方式之一: #### 2. 升级spring-data-elasticsearch版本 将spring-data-elasticsearch升级到4.x版本(如4.2.0),以确保包含`MappingElasticsearchConverter.setConversions`方法。需要在`pom.xml`中显式指定版本号: ```xml <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-elasticsearch</artifactId> <version>4.2.0</version> </dependency> ``` 需要注意的是,升级版本可能会导致其他兼容性问题,例如Elasticsearch客户端版本要求的变化。请确保Elasticsearch服务器版本与spring-data-elasticsearch 4.x版本兼容[^1]。 #### 3. 自定义MappingElasticsearchConverter 如果无法升级spring-data-elasticsearch版本,可以通过自定义`MappingElasticsearchConverter`来实现类似功能。以下是一个示例代码: ```java import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.data.elasticsearch.core.convert.ElasticsearchCustomConversions; import org.springframework.data.elasticsearch.core.mapping.SimpleElasticsearchMappingContext; @Configuration public class ElasticsearchConfig { @Bean public MappingElasticsearchConverter elasticsearchConverter(ElasticsearchCustomConversions conversions) { SimpleElasticsearchMappingContext mappingContext = new SimpleElasticsearchMappingContext(); // 自定义逻辑替代 setConversions 方法 return new MappingElasticsearchConverter(mappingContext, conversions); } } ``` 通过这种方式,可以在不修改核心库的情况下实现类似功能[^3]。 #### 4. 检查依赖冲突 如果已经使用了正确的版本但仍然报错,可能是由于Maven或Gradle中的依赖冲突导致。可以通过以下命令检查依赖树并解决冲突: - Maven: ```bash mvn dependency:tree ``` - Gradle: ```bash gradle dependencies ``` 确保没有其他版本的spring-data-elasticsearch被意外引入[^2]。 --- ###
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