使用ehCache作为本地缓存 

package nd.sdp.basic.config;

import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.ehcache.EhCacheCacheManager;
import org.springframework.cache.ehcache.EhCacheManagerFactoryBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;

/**
 * 本地缓存配置，默认为ehcache
 */
@Configuration
@EnableCaching(proxyTargetClass = true)
public class LocalCacheConfig extends CachingConfigurerSupport {

    @Bean
    public EhCacheManagerFactoryBean ehCacheManagerFactoryBean() {
        return getEhCacheManagerFactoryBean();
    }

    /**
     * 获得缓存管理器。默认的为EhCacheCacheManager
     */
    protected EhCacheManagerFactoryBean getEhCacheManagerFactoryBean() {
        EhCacheManagerFactoryBean ehCacheManagerFactoryBean = new EhCacheManagerFactoryBean();
        ehCacheManagerFactoryBean.setConfigLocation(new ClassPathResource("ehcache/ehcache.xml"));
        return ehCacheManagerFactoryBean;
    }

    @Bean
    public CacheManager cacheManager() {
        return getCacheManager();
    }

    protected CacheManager getCacheManager() {
        EhCacheCacheManager ehCacheCacheManager = new EhCacheCacheManager();
        ehCacheCacheManager.setCacheManager(ehCacheManagerFactoryBean().getObject());
        return ehCacheCacheManager;
    }

}

 

pom：

 1         <dependency>
 2             <groupId>net.sf.ehcache</groupId>
 3             <artifactId>ehcache-core</artifactId>
 4             <version>2.6.8</version>
 5             <exclusions>
 6                 <exclusion>
 7                     <groupId>commons-logging</groupId>
 8                     <artifactId>commons-logging</artifactId>
 9                 </exclusion>
10             </exclusions>
11         </dependency>

 

ehcache.xml

 1 <ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 2          xsi:noNamespaceSchemaLocation="ehcache.xsd" updateCheck="true"
 3          monitoring="autodetect"
 4          dynamicConfig="true">
 5 
 6     <diskStore path="java.io.tmpdir"/>
 7 
 8     <!--项目列表缓存，时间为1天-->
 9     <cache name="projectList" timeToLiveSeconds="3600"
10            maxElementsInMemory="500" eternal="false" overflowToDisk="false"
11            maxElementsOnDisk="1000" diskPersistent="false"
12            memoryStoreEvictionPolicy="LRU"/>
13 
14 
15 
16 </ehcache>
17 
18 
19         <!--
20              name : 缓存器名称
21              maxElementsInMemory : 内存中缓存元素的最大数目
22              maxElementsOnDisk : 磁盘中缓存元素的最大数目
23              eternal : 缓存是否会过期，如果为 true 则忽略timeToIdleSeconds 和 timeToLiveSeconds
24              overflowToDisk : 内存中缓存已满时是否缓存到磁盘，如果为 false 则忽略
25              maxElementsOnDisk timeToIdleSeconds : 缓存元素的最大闲置时间（秒），这段时间内如果不访问该元素则缓存失效
26              timeToLiveSeconds : 缓存元素的最大生存时间（秒），超过这段时间则强制缓存失效
27              memoryStoreEvictionPolicy : 使用 LFU 算法清除缓存
28          -->

 使用：

 1 package nd.sdp.auditingtools.systems.service;
 2 
 3 import nd.sdp.basic.utils.HttpUtil;
 4 import org.dom4j.Document;
 5 import org.dom4j.DocumentException;
 6 import org.dom4j.DocumentHelper;
 7 import org.dom4j.Element;
 8 import org.springframework.beans.factory.annotation.Value;
 9 import org.springframework.cache.annotation.Cacheable;
10 import org.springframework.context.annotation.PropertySource;
11 import org.springframework.stereotype.Service;
12 
13 import java.util.*;
14 
15 /**
16  *
17  */
18 @Service
19 @PropertySource("classpath:app.properties")
20 public class ProjectService {
21 
22     @Value("${level_one_projects_url}")
23     String levelOneProjectsUrl;
24 
25     @Value("${level_two_projects_url}")
26     String levelTwoProjectsUrl;
27 
28 
29 
30     @Cacheable(value = "projectList",key = "'levelOneProjects_'+#userId")
31     public List<Map<String, String>> getLevelOneProjects(String userId) throws Exception {
32         String result = HttpUtil.get(levelOneProjectsUrl.replace("{code}", userId));
33         Document document = DocumentHelper.parseText(result);
34         return parseDocument(document);
35 
36     }
37 
38     @Cacheable(value = "projectList",key = "'levelTwoProjects_'+#code")
39     public List<Map<String, String>> getLevelTwoProjects(String code) throws Exception {
40         String result = HttpUtil.get(levelTwoProjectsUrl.replace("{code}", code));
41         Document document = DocumentHelper.parseText(result);
42         return parseDocument(document);
43     }
44 
45 
46     private List<Map<String, String>> parseDocument(Document document) throws DocumentException {
47         Element root = document.getRootElement();
48         List<Map<String, String>> list = new ArrayList<>();
49         for (Iterator i = root.elementIterator(); i.hasNext(); ) {
50             Element element = (Element) i.next();
51             Map<String, String> map = new HashMap<>();
52             map.put("key", element.getXPathResult(1).getStringValue());
53             map.put("value", element.getXPathResult(3).getStringValue());
54             list.add(map);
55         }
56         return list;
57     }
58 
59 }

 

posted @ 2016-11-08 14:25  yweihainan  阅读(4167)  评论(0)  编辑  收藏  举报