聊聊jedis连接池的预热_jediscluster 预热-优快云博客

本文介绍了在高并发场景中如何使用Jedis连接池预热技术，通过`DirectFieldAccessor`获取连接池并创建一定数量的连接进行ping操作，以减少首次请求时的延迟。

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本文主要研究一下jedis连接池的预热

预热

@Component
@Slf4j
public class JedisWarmUp implements CommandLineRunner {

    @Autowired
    JedisConnectionFactory jedisConnectionFactory;

    @Override
    public void run(String... args) throws Exception {
        GenericObjectPoolConfig poolConfig = jedisConnectionFactory.getPoolConfig();
        if (poolConfig == null) {
            return ;
        }

        try {
            DirectFieldAccessor accessor = new DirectFieldAccessor(jedisConnectionFactory);
            JedisPool jedisPool = (JedisPool) accessor.getPropertyValue("pool");
            if (jedisPool == null) {
                log.info("jedisConnectionFactory.pool is null");
                return;
            }

            int warmUpSize = poolConfig.getMaxIdle();
            warmUp(jedisPool, warmUpSize);

        } catch (Exception e) {
            log.error("warmup jedisPool error:{}", e.getMessage());
        }
    }

    private void warmUp(JedisPool jedisPool, int warmUpSize) {
        List<Jedis> warmUpList = new ArrayList<>(warmUpSize);
        for (int i=0; i< warmUpSize; i++) {
            Jedis jedis = jedisPool.getResource();
            jedis.ping();
            warmUpList.add(jedis);
        }
        warmUpList.stream().forEach(jedis -> jedis.close());
    }
}