Redis缓存的实现

public class UserDefineRedisCache implements Cache {
    private Logger logger = LoggerFactory.getLogger(UserDefineRedisCache.class);

    private String id;//存储namespace
    private long timeout = 300;
    private ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
    private RedisTemplate redisTemplate;

    private RedisTemplate getRedisTemplate() {
        return (RedisTemplate) ApplicationContextHolder.getBean("redisTemplate");
    }


    public UserDefineRedisCache(String id) {
        this.id = id;
    }

    @Override
    public String getId() {
        return id;
    }

    @Override
    public void putObject(Object key, Object value) {

        if (redisTemplate == null) {
            redisTemplate = getRedisTemplate();
        }

        logger.debug("将查询结果存储到cache.key:" + key + ",value:" + value);
        ValueOperations opsForValue = redisTemplate.opsForValue();
        opsForValue.set(key, value, timeout, TimeUnit.SECONDS);
    }

    @Override
    public Object getObject(Object key) {

        if (redisTemplate == null) {
            redisTemplate = getRedisTemplate();
        }
        logger.debug("从缓存中读取结果.key:" + key);
        ValueOperations opsForValue = redisTemplate.opsForValue();
        return opsForValue.get(key);
    }

    @Override
    public Object removeObject(Object key) {
        if (redisTemplate == null) {
            redisTemplate = getRedisTemplate();
        }
        logger.debug("从缓存中清除.key:" + key);
        ValueOperations opsForValue = redisTemplate.opsForValue();
        Object value = opsForValue.get(key);
        redisTemplate.delete(key);
        return value;
    }

    @Override
    public void clear() {
        if (redisTemplate == null) {
            redisTemplate = getRedisTemplate();
        }

        logger.debug("从缓存中清除缓存区所有数据");
        redisTemplate.execute(new RedisCallback() {
            @Override
            public Object doInRedis(RedisConnection redisConnection) throws DataAccessException {
                redisConnection.flushDb();
                return null;
            }
        });
    }

    @Override
    public int getSize() {
        return 0;
    }

    @Override
    public ReadWriteLock getReadWriteLock() {
        return readWriteLock;
    }

    public void setTimeout(long timeout) {
        this.timeout = timeout;
    }
}