Shiro缓存管理

Shiro缓存管理

• CacheManager、Cache
• Redis实现CacheManager

spring.xml

<!-- 创建SecurityManager对象-->
<bean class="org.apache.shiro.web.mgt.DefaultWebSecurityManager" id="securityManager">
    <property name="realm" ref="realm" />
    <property name="sessionManager" ref="sessionManager" />
    <property name="cacheManager" ref="cacheManager" />
</bean>
<bean class="org.apache.shiro.web.session.mgt.DefaultWebSessionManager" id="sessionManager">
    <property name="sessionDAO" ref="redisSessionDao" />
</bean>
<bean class="com.imooc.session.RedisSessionDao" id="redisSessionDao" />
<bean class="com.imooc.cache.RedisCacheManager" id="cacheManager" />

RedisCache

public class RedisCache<K, V> implements Cache<K, V> {
    @Resource
    private JedisUtil jedisUtil;

    private final String CACHE_PREFIX = "imooc-cache";

    private byte[] getKey(K k) {
        if (k instanceof String) {
            return (CACHE_PREFIX + k).getBytes();
        }
        return SerializationUtils.serialize(k);
    }

    @Override
    public V get(K k) throws CacheException {
        byte[] value= jedisUtil.get(getKey(k));
        if (value != null) {
            return (V) SerializationUtils.deserialize(value);
        }
        return null;
    }

    @Override
    public V put(K k, V v) throws CacheException {
        byte[] key = getKey(k);
        byte[] value = SerializationUtils.serialize(v);
        jedisUtil.set(key, value);
        jedisUtil.expire(key, 600);
        return v;
    }

    @Override
    public V remove(K k) throws CacheException {
        byte[] key = getKey(k);
        byte[] value = jedisUtil.get(key);
        jedisUtil.del(key);
        if (value != null) {
            return (V) SerializationUtils.deserialize(value);
        }
        return null;
    }

    @Override
    public void clear() throws CacheException {
        //
    }

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

    @Override
    public Set<K> keys() {
        return null;
    }

    @Override
    public Collection<V> values() {
        return null;
    }
}

RedisCacheManager

public class RedisCacheManager implements CacheManager {

    @Resource
    private RedisCache redisCache;

    @Override
    public <K, V> Cache<K, V> getCache(String s) throws CacheException {
        return redisCache;
    }
}