不被spring管理的类依赖于spring管理的bean，如何让spring管理的bean及早初始化？

Question

我要配置mybatis二级缓存为redis
因为需要注入redis的ip port username等等
我需要构建JedisPoolConfig的bean，然后得到JedisConnectionFactory的bean
而我定义的redis缓存如下

final class MybatisCache implements Cache {
private String id
private final ReadWriteLock readWriteLock = new DummyReadWriteLock()
private RedisTemplate<String, Object> redisTemplate
private HashOperations<String, Object, Object> hashOperations
private static JedisConnectionFactory jedisConnectionFactory

static setJedisConnectionFactory(JedisConnectionFactory factory){
    jedisConnectionFactory = factory
}

MybatisCache(String id) {
    if (id == null) {
        throw new IllegalArgumentException("Cache instances require an ID")
    } else {
        this.id = id
        redisTemplate = new RedisTemplate()
        redisTemplate.setConnectionFactory(jedisConnectionFactory)
        redisTemplate.setKeySerializer(new StringRedisSerializer())
        redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer())
        redisTemplate.setHashKeySerializer(new GenericJackson2JsonRedisSerializer())
        redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer())
        redisTemplate.afterPropertiesSet()
        hashOperations = redisTemplate.opsForHash()
    }
        。。。
}

但是MybatisCache不是spring的bean，所以如果这个类被加载时JedisPoolConfig，JedisConnectionFactory等bean还没有初始化的话，就得到null，有没有什么办法让JedisPoolConfig，JedisConnectionFactory等bean能保证在MybatisCache被使用期前初始化？

Answer 1

你可以注解MybatisCache成为spring的bean，如果你有其他理由不这样做的话，也可以在MybatisCache的构造方法中调用spring创建JedisPoolConfig，JedisConnectionFactory的实例。