Redis使用工具类

项目中引入了Redis。虽然Jfinal整合了Redis,但是使用自身的序列化机制效率并不是很高，目前比较好的序列化机制是google的Protostuff，所以这里采用Protostuff编写一个Redis工具类。代码如下：

public class RedisDao {
	private final Logger logger = LoggerFactory.getLogger(this.getClass());
	
	private final JedisPool jedisPoll;
	
	public RedisDao(String ip, int port){
		jedisPoll = new JedisPool(ip, port);
	}
    //以Users为例
	private RuntimeSchema<Users> schema = RuntimeSchema.createFrom(Users.class);
	//获取对象缓存
	public Object get(String usersId) {
		// redis操作
		try {
			Jedis jedis = jedisPoll.getResource();
			try {
			//java自带序列化机制效率不高，采用google protostuff实现自身序列化机制
			String  key = "userId:"+ usersId;
			//实现序列化机制,对象必须为pojo类型
			byte[] bytes = jedis.get(key.getBytes());
			
			if(bytes != null){
				Users users = schema.newMessage();
				ProtostuffIOUtil.mergeFrom(bytes, users, schema);
				return users;
			}						
			} finally {
				jedis.close();
			}
		} catch (Exception e) {
			// TODO: handle exception
			logger.error(e.getMessage(), e);
		}
		return null;
	}
	
	//将对象放入缓存
	public Object set(Users users){
	  try {
		Jedis jedis = jedisPoll.getResource();
		try {
			String key = "userId:"+ users.getAccid();
			byte[] bytes = ProtostuffIOUtil.toByteArray(users, schema, 
					LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE));
			//超时缓存
			int timeout = 60*60;
			//返回结果
			String result  = jedis.setex(key.getBytes(), timeout, bytes);
		    return result;
	    } finally {
			jedis.close();
		}	
	    }catch (Exception e) {
		// TODO: handle exception
	    logger.error(e.getMessage(), e);
	   }
	   return null;	
}
}

初始化代码如下：

RedisDao redisDao = new RedisDao("localhost", 6379);