数据采集系统_spring缓存模块

于 2013-10-02 19:51:57 发布
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本文链接：https://blog.youkuaiyun.com/renjiangfeng3/article/details/12239955
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本文介绍如何在Spring框架中实现缓存管理和远程服务调用。内容涵盖配置二级缓存、自定义缓存Key生成器及使用Spring的缓存抽象层。同时，详细讲解了基于HTTP Invoker的远程服务发布与消费过程。

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Hibernate二级缓存：类缓存，集合缓存，更新时间缓存，查询缓存


程序优化:缓存

hibernate:二级缓存.

 

 

集成spring的缓存模块(子项目)实现对service的缓存代理,降低数据负载压力.

--------------------------------------------------------------

1.引入类库

         spring-modules-cache.jar

 

         [第三方缓存供应商]

         backport-util-concurrent.jar

         com.springsource.org.apache.commons.logging-1.1.1.jar

         ehcache-1.5.0.jar

         jsr107cache-1.1.jar

2.配置ehcache配置文件,指定缓存的过期策略.

         [conf/ehcache.xml]

         <ehcachexmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

                   xsi:noNamespaceSchemaLocation="../config/ehcache.xsd">

                   <diskStorepath="java.io.tmpdir"/>

                   <defaultCache

                                     maxElementsInMemory="10000"

                                     eternal="false"

                                     timeToIdleSeconds="120"

                                     timeToLiveSeconds="120"

                                     overflowToDisk="true"

                                     maxElementsOnDisk="10000000"

                                     diskPersistent="false"

                                      diskExpiryThreadIntervalSeconds="120"

                                     memoryStoreEvictionPolicy="LRU"

                                     />

                   <cachename="surveyCache"

                                     maxElementsInMemory="10000"

                                     eternal="false"

                                     timeToIdleSeconds="120"

                                     timeToLiveSeconds="120"

                                     overflowToDisk="true"

                                     maxElementsOnDisk="10000000"

                                     diskPersistent="false"

                                     diskExpiryThreadIntervalSeconds="120"

                                     memoryStoreEvictionPolicy="LRU"

                                     />

         </ehcache>

3.配置spring的缓存模块的配置文件

         [conf/service-spring-cache.xml]

         <beansxmlns="http://www.springframework.org/schema/beans"

                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

                   xmlns:ehcache="http://www.springmodules.org/schema/ehcache"

                   xsi:schemaLocation="http://www.springframework.org/schema/beans

                                                                 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

                                                                 http://www.springmodules.org/schema/ehcache

                                                                 http://www.springmodules.org/schema/cache/springmodules-ehcache.xsd">

                   <!--指定ehcache的配置文件 -->

                   <ehcache:configconfigLocation="classpath:ehcache.xml"/>

                  

                   <!--配置缓存代理 -->

                   <ehcache:proxyid="surveyServiceCacheProxy" refId="surveyService">

                            <!--缓存数据 -->

                            <ehcache:cachingmethodName="get*" cacheName="surveyCache"/>

                            <ehcache:cachingmethodName="load*" cacheName="surveyCache"/>

                            <ehcache:cachingmethodName="find*" cacheName="surveyCache"/>

                            <ehcache:cachingmethodName="is*" cacheName="surveyCache"/>

                           

                            <!--清理缓存 -->

                            <ehcache:flushingmethodName="save*" cacheNames="surveyCache" />

                            <ehcache:flushingmethodName="update*" cacheNames="surveyCache" />

                            <ehcache:flushingmethodName="delete*" cacheNames="surveyCache" />

                            <ehcache:flushingmethodName="batch*" cacheNames="surveyCache" />

                   </ehcache:proxy>

         </beans>

4.将service缓存代理注入给action

         publicclass SurveyAction ...{

                   ...

                   //注入缓存代理

                   @Resource(name="surveyServiceCacheProxy")

                   privateSurveyService surveyService ;

         }

 

5.配置web.xml文件,一同加载spring缓存配置文件.

         <!--通过上下文参数指定spring配置文件的位置 -->

         <context-param>

                   <param-name>contextConfigLocation</param-name>

                   <param-value>classpath:beans.xml,classpath:schedules.xml,classpath:service-spring-cache.xml</param-value>

         </context-param>

 

 

使用spring3.0的cache方案解决缓存问题,应用参与调查模块

--------------------------------------------------------

1.抽取spring-cache-3.1.xsd文件进行注册.

         org.springframework.context-3.1.0.RELEASE.jar/org.springframework.cache:缓存抽象包

xml头：

<?xml version="1.0"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:cache="http://www.springframework.org/schema/cache" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-3.1.xsd "></beans>


2.配置beans.xml文件中的缓存通知和切入点

        配置缓存通知

<!--缓存管理器工厂-->
<bean id="ehcache" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
    <!--ehcache配置文件，配置的是缓存的过期策略-->
    <property name="configLocation" value="classpath:ehcache.xml"/>
</bean>

<!--ehcache缓存管理器-->
<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
    <property name="cacheManager" ref="ehcache"/>
</bean>

<!--自定义key生成器-->
<bean id="surveyKeyGenerator" class="cn.itcast.surveypark.cache.SurveyKeyGenerator"/>

<cache:advice id="cacheAdvice" cache-manager="cacheManager" key-generator="surveyKeyGenerator">
    <cache:caching cache="surveyCache">
        <!--缓存数据-->
        <cache:cacheable method="get*"/>
        <cache:cacheable method="load*"/>
        <cache:cacheable method="find*"/>
        <cache:cacheable method="is*"/>

        <!--移除缓存数据-->
        <cache:cache-evict method="save*" all-entries="true"/>
        <cache:cache-evict method="update*" all-entries="true"/>
        <cache:cache-evict method="delete*" all-entries="true"/>
        <cache:cache-evict method="batch*" all-entries="true"/>
    </cache:caching>
</cache:advice>

配置缓存通知切入点： 

<!-- 缓存通知,只限于SurveyService的方法 -->
<aop:advisor advice-ref="cacheAdivce" 
	pointcut="execution(* cn.itcast.surveypark.service.SurveyService.*(..))" 
	order="0"/>


3.自定义key生成器.

        

public class SurveyKeyGenerator implements KeyGenerator {
    @Override
    public Object generate(Object o, Method method, Object... objects) {
        String targHashCode = o.getClass().getSimpleName() + "[+"+o.hashCode()+"+]";
        String mname = method.getName();
        String key = null;
        if(ValidateUtil.isValid(objects)){
            StringBuffer buffer = new StringBuffer();
            for(Object p : objects){
                buffer.append(p.toString() + ",");
            }
            key = targHashCode + "." + mname + "("+ DataUtil.md5(buffer.toString())+")";
            System.out.println(key);
            return key;
        }
        key = targHashCode + "." + mname + "()";
        System.out.println(key);
        return key;
    }
}

spring远程调用:

------------------------

-----------server-----------

1.创建web项目

2.添加spring类库

         org.springframework.aop-3.1.0.RELEASE.jar

         org.springframework.asm-3.1.0.RELEASE.jar

         org.springframework.beans-3.1.0.RELEASE.jar

         org.springframework.context-3.1.0.RELEASE.jar

         org.springframework.context.support-3.1.0.RELEASE.jar

         org.springframework.core-3.1.0.RELEASE.jar

         org.springframework.web-3.1.0.RELEASE.jar

         org.springframework.web.servlet-3.1.0.RELEASE.jar

         org.springframework.expression-3.1.0.RELEASE.jar

 

         com.springsource.org.aopalliance-1.0.0.jar

         com.springsource.org.apache.commons.logging-1.1.1.jar

3.创建接口和实现类

         publicinterface WelcomeService {

                   publicvoid sayHello(String name);

         }

 

         publicclass WelcomeServiceImpl implements WelcomeService {

                   publicvoid sayHello(String name) {

                            System.out.println(name);

                   }

         }

4.配置spring配置文件.

         [web-inf/${servler-name}-servlet.xml]

         <?xmlversion="1.0"?>

         <beansxmlns="http://www.springframework.org/schema/beans"

                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"

                   xmlns:tx="http://www.springframework.org/schema/tx"xmlns:aop="http://www.springframework.org/schema/aop"

                   xmlns:cache="http://www.springframework.org/schema/cache"

                   xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-3.0.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-3.0.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-3.0.xsdhttp://www.springframework.org/schema/cachehttp://www.springframework.org/schema/cache/spring-cache-3.1.xsd ">

                  

                   <!--pojo -->

                   <beanid="welcomeService"class="cn.itcast.spring.rpc.service.WelcomeServiceImpl" />

                  

                   <!--导出器,将pojo对象转变成controller,处理请求 -->

                   <beanname="/ws.service"class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter">

                            <propertyname="serviceInterface">

                                     <value>cn.itcast.spring.rpc.service.WelcomeService</value>

                            </property>

                            <propertyname="service" ref="welcomeService" />

                   </bean>

         </beans>

 

-----------client-----------

5.创建java项目

6.引入类库

         同服务端.

7.复制服务端接口到客户端.

8.创建src/client.xmlspring配置文件

         <?xmlversion="1.0"?>

         <beansxmlns="http://www.springframework.org/schema/beans"

                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"

                   xmlns:tx="http://www.springframework.org/schema/tx"xmlns:aop="http://www.springframework.org/schema/aop"

                   xmlns:cache="http://www.springframework.org/schema/cache"

                   xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-3.0.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-3.0.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-3.0.xsdhttp://www.springframework.org/schema/cachehttp://www.springframework.org/schema/cache/spring-cache-3.1.xsd ">

                   <!--客户端代理 -->

                   <beanid="wsClient"class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean">

                            <propertyname="serviceUrl">

                                     <value>http://localhost:8080/lsn_springrpc_0909_server/ws.service</value>

                            </property>

                            <propertyname="serviceInterface">

                                     <value>cn.itcast.spring.rpc.service.WelcomeService</value>

                            </property>

                   </bean>

         </beans>

9.创建测试类

         publicclass App {

                   publicstatic void main(String[] args) {

                            ApplicationContextac = new ClassPathXmlApplicationContext("client.xml");

                            WelcomeServicews = (WelcomeService) ac.getBean("wsClient");

                            ws.sayHello("tom");

                   }

         }

10.运行

         先启动服务器端

         在启动客户端.

 

将项目中的统计服务对外公开,供第三方系统整合

-------------------------------------------

--------- server ---------

1.引入类库

         org.springframework.web.servlet-3.1.0.RELEASE.jar

2.配置web.xml文件DispatcherServlet

         <!--  配置spring远程调用使用的分发器servlet-->

         <servlet>

                   <servlet-name>service</servlet-name>

                   <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

                   <init-param>

                            <param-name>contextConfigLocation</param-name>

                            <param-value>classpath:service-spring-http-inovker.xml</param-value>

                   </init-param>

         </servlet>

         <servlet-mapping>

                   <servlet-name>service</servlet-name>

                   <url-pattern>/*.service</url-pattern>

         </servlet-mapping>

3.配置spring远程调用配置文件

         [conf/service-spring-http-invoker.xml]

         <?xmlversion="1.0"?>

         <beansxmlns="http://www.springframework.org/schema/beans"

                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"

                   xmlns:tx="http://www.springframework.org/schema/tx"xmlns:aop="http://www.springframework.org/schema/aop"

                   xmlns:cache="http://www.springframework.org/schema/cache"

                   xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-3.0.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-3.0.xsdhttp://www.springframework.org/schema/cachehttp://www.springframework.org/schema/cache/spring-cache-3.1.xsd ">

                  

                   <!--远程调用统计服务类 -->

                   <beanname="/ss.service"class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter">

                            <propertyname="serviceInterface"value="cn.itcast.surveypark.service.StatisticsService" />

                            <propertyname="service" ref="statisticsService" />

                   </bean>

         </beans>

 

------- client  ----------

4.添加客户端配置bean.

         <!--客户端代理 -->

         <beanid="ssClient"class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean">

                   <propertyname="serviceUrl">

                            <value>http://localhost:8000/lsn_surveypark0909/ss.service</value>

                   </property>

                   <propertyname="serviceInterface">

                            <value>cn.itcast.surveypark.service.StatisticsService</value>

                   </property>

         </bean>

5.测试

 

spring mvc配置文件自定义命名：配置初始化参数(contextConfigLocation)

 

<!-- 配置spring分发器servlet-->

<servlet>

         <servlet-name>service</servlet-name>

         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

         <!--通过初始化参数指定spring配置文件的位置 -->

         <init-param>

                   <param-name>contextConfigLocation</param-name>

                   <param-value>classpath:beans.xml</param-value>

         </init-param>

</servlet>

<servlet-mapping>

         <servlet-name>service</servlet-name>

         <url-pattern>*.service</url-pattern>

</servlet-mapping>

 

 

 

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