spring mvc + mybatis 的ehcache 的简单实现

由于这两天用的springmvc 和 mybatis 的搭建的web 框架 然后准备用缓存数据，就简单记录下

准备：

googlecode 的ehcache

这个可以在https://code.google.com/p/ehcache-spring-annotations/ 下载，下载之后拿出来要用到的jar包

　　　　

下载的压缩包中的注解包

ehcache-spring-annotations-1.2.0.jar

下载的压缩包中lib 目录下的

ehcache-core-2.4.5.jar
guava-r09.jar

　　由于其他的一些包都在spring mvc 中已经有了，只需要添加这几个进去。

配置ehcache.xml

在src 目录下新增配置 ehcache.xml 如下：

<?xml version="1.0" encoding="UTF-8"?>
<!--
/**
*
* 缓存配置
* @author yq
* @date 2014.9.10
*
*/ -->

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"
updateCheck="false">
<diskStore path="java.io.tmpdir" />
<defaultCache eternal="false"
maxElementsInMemory="1000"
overflowToDisk="false"
diskPersistent="false"
timeToIdleSeconds="0"
timeToLiveSeconds="600"
memoryStoreEvictionPolicy="LRU" />

<cache name="CustomerCache"
eternal="false"
maxElementsInMemory="100"
overflowToDisk="false"
diskPersistent="false"
timeToIdleSeconds="0"
timeToLiveSeconds="300"
memoryStoreEvictionPolicy="LRU" />

</ehcache>

此配置中 可以有多个cache ，方便管理我们程序中的cache。

配置spring.xml

<ehcache:annotation-driven cache-manager="ehCacheManager" />
<bean id="ehCacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
<property name="configLocation" value="classpath:ehcache.xml" />
</bean>

接下来就到我们的代码 Service 层 试用缓存了：

@Cacheable(cacheName = "CustomerCache")
public Customer GetCustomerByCid(int cid){
System.out.print("----------------------------------------------------------");
return cd.GetCustomerByCid(cid);
}
//修改客户
@TriggersRemove(cacheName ={"CustomerCache"},removeAll=true)
public int UpdateCustomer(Customer cus){
return cd.UpdateCustomer(cus);
}

注意包的import ，是这两个

import com.googlecode.ehcache.annotations.Cacheable;
import com.googlecode.ehcache.annotations.TriggersRemove;

以上就已经搭建好了。

当我们两次调用 service 中的 GetCustomerByCid 方法时候控制台只有一次sql打印表示成功了

DEBUG - DispatcherServlet with name 'myproject-dispatcher' processing GET request for [/jxc/customer/GetCustomerByCid]
DEBUG - Looking up handler method for path /customer/GetCustomerByCid
DEBUG - Returning handler method [public java.lang.String com.ly.jxc.controller.CustomerController.GetCustomerByCid(java.lang.String,org.springframework.ui.ModelMap)]
DEBUG - Returning cached instance of singleton bean 'customerController'
DEBUG - Last-Modified value for [/jxc/customer/GetCustomerByCid] is: -1
DEBUG - Generated key '369036164508828' for invocation: ReflectiveMethodInvocation: public com.ly.jxc.entity.Customer com.ly.jxc.service.CustomerService.GetCustomerByCid(int); target is of class [com.ly.jxc.service.CustomerService]
----------------------------------------------------------DEBUG - Creating a new SqlSession
DEBUG - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@d213c] was not registered for synchronization because synchronization is not active
DEBUG - Fetching JDBC Connection from DataSource
DEBUG - JDBC Connection [jdbc:mysql://192.168.1.6:3306/lyjxc?useUnicode=true&characterEncoding=utf-8, UserName=root@7-PC, MySQL-AB JDBC Driver] will not be managed by Spring
DEBUG - ooo Using Connection [jdbc:mysql://192.168.1.6:3306/lyjxc?useUnicode=true&characterEncoding=utf-8, UserName=root@7-PC, MySQL-AB JDBC Driver]
DEBUG - ==>  Preparing: select * from Customer where cid=?
DEBUG - ==> Parameters: 18(Integer)
DEBUG - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@d213c]
DEBUG - Returning JDBC Connection to DataSource
DEBUG - Rendering view [com.ly.jxc.util.FreeMarkerPath: name 'Settings/addCustomer'; URL [Settings/addCustomer.html]] in DispatcherServlet with name 'myproject-dispatcher'
DEBUG - Added model object 'Customer' of type [com.ly.jxc.entity.Customer] to request in view with name 'Settings/addCustomer'
DEBUG - Added model object 'springMacroRequestContext' of type [org.springframework.web.servlet.support.RequestContext] to request in view with name 'Settings/addCustomer'
DEBUG - Added model object 'webRoot' of type [java.lang.String] to request in view with name 'Settings/addCustomer'
DEBUG - Added model object 'org.springframework.validation.BindingResult.Customer' of type [org.springframework.validation.BeanPropertyBindingResult] to request in view with name 'Settings/addCustomer'
DEBUG - Rendering FreeMarker template [Settings/addCustomer.html] in FreeMarkerView 'Settings/addCustomer'
DEBUG - "Settings/addCustomer.html"["zh_CN",GBK,parsed] using cached since E:\vss\Project\Java\ly_Smbf\WebRoot\Settings\addCustomer.html didn't change.
DEBUG - Successfully completed request
DEBUG - Returning cached instance of singleton bean 'sqlSessionFactory'
DEBUG - DispatcherServlet with name 'myproject-dispatcher' processing GET request for [/jxc/customer/GetCustomerByCid]
DEBUG - Looking up handler method for path /customer/GetCustomerByCid
DEBUG - Returning handler method [public java.lang.String com.ly.jxc.controller.CustomerController.GetCustomerByCid(java.lang.String,org.springframework.ui.ModelMap)]
DEBUG - Returning cached instance of singleton bean 'customerController'
DEBUG - Last-Modified value for [/jxc/customer/GetCustomerByCid] is: -1
DEBUG - Generated key '369036164508828' for invocation: ReflectiveMethodInvocation: public com.ly.jxc.entity.Customer com.ly.jxc.service.CustomerService.GetCustomerByCid(int); target is of class [com.ly.jxc.service.CustomerService]
DEBUG - Rendering view [com.ly.jxc.util.FreeMarkerPath: name 'Settings/addCustomer'; URL [Settings/addCustomer.html]] in DispatcherServlet with name 'myproject-dispatcher'
DEBUG - Added model object 'Customer' of type [com.ly.jxc.entity.Customer] to request in view with name 'Settings/addCustomer'
DEBUG - Added model object 'springMacroRequestContext' of type [org.springframework.web.servlet.support.RequestContext] to request in view with name 'Settings/addCustomer'
DEBUG - Added model object 'webRoot' of type [java.lang.String] to request in view with name 'Settings/addCustomer'
DEBUG - Added model object 'org.springframework.validation.BindingResult.Customer' of type [org.springframework.validation.BeanPropertyBindingResult] to request in view with name 'Settings/addCustomer'
DEBUG - Rendering FreeMarker template [Settings/addCustomer.html] in FreeMarkerView 'Settings/addCustomer'
DEBUG - "Settings/addCustomer.html"["zh_CN",GBK,parsed] cached copy not yet stale; using cached.
DEBUG - Successfully completed request
DEBUG - Returning cached instance of singleton bean 'sqlSessionFactory'

　　

以上就是简单记录下。