//MemcachedFactory.javapublic class MemcachedFactory {// 创建MemCachedClient全局对象
private static MemCachedClient memCachedClient = new MemCachedClient();static {
// 创建服务器列表及其权重
String[] servers = { "127.0.0.1:11211" };
Integer[] weights = { 3 };// 创建Socket连接池
SockIOPool pool = SockIOPool.getInstance();// 设置服务器信息
pool.setServers(servers);
pool.setWeights(weights);
pool.setFailover(true);// 设置初始连接数、最小和最大连接数以及最大处理时间
pool.setInitConn(5);
pool.setMinConn(5);
pool.setMaxConn(250);
pool.setMaxIdle(1000 * 60 * 60 * 6);// 设置主线程睡眠时间
pool.setMaintSleep(30);// 设置TCP参数、连接超时等
pool.setNagle(false);
pool.setSocketTO(3000);
pool.setSocketConnectTO(0);
pool.setAliveCheck(true);// 初始化连接池
pool.initialize();
}protected MemcachedFactory() {
}// Memcached 实例
protected static MemcachedFactory instance = new MemcachedFactory();public static MemcachedFactory getInstance() {
return instance;
}/**
* 添加缓存记录
* @param key
* @param value
* @return
*/
public boolean add(String key, Object value) {
return memCachedClient.add(key, value);
}/**
* 添加缓存记录，有效期为expiry
* @param key
* @param value
* @param expiry
* @return
*/
public boolean add(String key, Object value, Date expiry) {
return memCachedClient.add(key, value, expiry);
}/**
* 缓存查询结果对象QueryResult
* @param key
* @param value
* @return
*/
public boolean add(String key, QueryResult<Menu> value) {
return memCachedClient.add(key, value);
}/**
* 提取缓存记录
* @param key
* @return
*/
public Object get(String key) {
return memCachedClient.get(key);
}/**
* 判断缓存是否存在
* @param key
* @return
*/
public boolean keyExist(String key) {
return memCachedClient.keyExists(key);
}
}IndexController.java@Controller
public class IndexCtroller{
@Autowired
private IIndexService indexService;@RequestMapping(value = "/back/index")
public String index(HttpServletRequest request) {
MemcachedFactory mcInstance = MemcachedFactory.getInstance();
String jsonTree = null;//不存在key缓存记录则查询数据库并添加存入memcached
if(!mcInstance.keyExist("jsonTree")) {List<Menu> menuList = indexService.queryMenu();List2JsonUtil<Menu> list2JsonUtil = new List2JsonUtil<Menu>(new Menu());jsonTree = list2JsonUtil.getJosnStrFromList(menuList, null);mcInstance.add("jsonTree", jsonTree);
//否则直接从memcached中提取
}else {jsonTree = (String) mcInstance.get("jsonTree");
}if(null != jsonTree){request.setAttribute("jsonTree", jsonTree);
}
return "/back/index";
}
}