shiro使用redis缓存

使用shiro，在ShiroConfig中定义实例对象securityManager：

@Bean
    public SecurityManager securityManager(MyShiroRealm myShiroRealm, RedissonWebSessionManager redissonWebSessionManager, RedissonShiroCacheManager redissonShiroCacheManager) {
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();

        // 自定义缓存实现 使用redis
        securityManager.setCacheManager(redissonShiroCacheManager);

        return securityManager;
    }

其中redissonShiroCacheManager就是自定义的redis实现缓存，redissonShiroCacheManager中获取cache对象getCache。主要介绍cache对象存取数据的过程：
RedissonShiroCache<K, V> implements Cache<K, V>

@Override
    public V get(K key) throws CacheException {
        Object value = (RedissonShiroCache)this.map.get(key);   //获取缓存
    
        return fromStoreValue(value);
    }

this.map.get(key)获取缓存,其中map的类型是RMap<K, Object> map,当调用get()方法时,会调用RMap的实现类RedissonMap<K, V>:

public V get(Object key) {
        return this.get(this.getAsync(key));
    }

下面是put方法,同上面的get方式流程:
RedissonShiroCache<K, V> implements Cache<K, V>

@Override
    public V put(K key, V value) throws CacheException {
       
         Object  previous = this.map.put(key, val, config.getTTL(), TimeUnit.MILLISECONDS,
                    config.getMaxIdleTime(), TimeUnit.MILLISECONDS);
        
        return fromStoreValue(previous);
    }

RedissonMap<K, V>

  public V put(K key, V value) {
        return this.get(this.putAsync(key, value));
    }