ehcache备忘

 

很多东西长时间不用就会忘记，然后再回过头来再去找，很浪费时间。还是在写下来比较好。

 

ehcache的配置文件：

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="ehcache.xsd">

	<diskStore path="java.io.tmpdir"/>
	
    <defaultCache
            maxElementsInMemory="10000"
            eternal="true"
            overflowToDisk="false"
            timeToIdleSeconds="0"
            timeToLiveSeconds="0"
            diskPersistent="false"
            diskExpiryThreadIntervalSeconds="120"/>

    <cache name="activity.rule"
           maxElementsInMemory="100"
           eternal="true"
           overflowToDisk="false"/>
    <cache name="organ.organDept"
           maxElementsInMemory="500"
           eternal="true"
           overflowToDisk="false"/>

</ehcache>

 

其中<cache>标签定义的就是要用的配置。

 

定义好了之后需要在spring配置文件中定义下一，一边容器启动后能创建cache的实例：

<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
		<description>EHCache的Manager</description>
		<property name="configLocation">
			<value>classpath:config/ehcache.xml</value>
		</property>
</bean>

	<bean id = "organDeptService" class = "com.cpic.p17.base.service.impl.OrganDeptServiceImpl" parent = "abstractOrganService">
		<property name="sequence"><value>INT_ORG_SEQ</value></property>
		
		<property name="propertyCompanyFilePath"><value>/js/dynamic/propertycomany.js</value></property>
		<property name="propertyBranchFilePath"><value>/js/dynamic/propertybranch.js</value></property>
		
		<property name="lifeCompanyFilePath"><value>/js/dynamic/lifecompany.js</value></property>
		<property name="lifeBrachFilePath"><value>/js/dynamic/lifebranch.js</value></property>
		
		<property name="propertyB2cFilePath"><value>/js/dynamic/propertyb2c.js</value></property>
		<property name="lifeB2cFilePath"><value>/js/dynamic/lifeb2c.js</value></property>
		
		<property name="variableNamePropertyCompany"><value>propertycomany</value></property>
		<property name="variableNamePropertyBranch"><value>propertybranch</value></property>
		
		<property name="variableNameLifeCompany"><value>lifecompany</value></property>
		<property name="variableNameLifeBranch"><value>lifebranch</value></property>
		
		<property name="variablePropertyB2c"><value>propertyc2b</value></property>
		<property name="variableLifeB2c"><value>lifec2b</value></property>
		
		<property name="applicationCacheService" ref="applicationCacheService"></property>
		<property name="areaAssService" ref="areaAssService"></property>
		<property name="parametersValueService" ref="parametersValueService" ></property>
		<property name="organDao" ref="organDao"></property>
		<property name="cacheManager" ref="cacheManager"></property>
	</bean>

 代码很简单，一看就明白，organDeptService中那么的属性是项目中用的，与本文无关，也懒的删了，不多说了，接下来看看ServiceImpl中怎么处理的。

 

private Cache organCache;

public void setCacheManager(CacheManager cacheManager) {
		organCache = cacheManager.getCache("organ.organDept");
	}

public List getBranchOrganChildList(Long organId) {
		if(organId != null && !"".equals(organId)) {
			Element children = organCache.get(organId.toString());
			if(children == null) {
				OrganDept organDept = getOrganDetpById(organId);
				if(organDept != null) {
					List childrenList = getChildOrgan(organDept.getOrganId());
					OrganDept child = null;
					List list = new ArrayList();
					for(int i = 0;i < childrenList.size();i++) {
						child = (OrganDept) childrenList.get(i);
						KeyValue keyValue = new KeyValue();
						keyValue.setKey(child.getOrganId());
						keyValue.setValue(child.getPartyFullname());
						list.add(keyValue);
					}
					Element element = new Element(organId.toString(),list);
					organCache.put(element);
					return list;
				}else {
					return Collections.EMPTY_LIST;
				}
			}else {
				return (List)children.getValue();
			}
		} else {
			return Collections.EMPTY_LIST;
		}
	}

 用法就这么简单。那么大段的代码是包含了业务逻辑，只需要看看cache是怎么存对象，和怎么取对象就行了。