Redis 'redis.publish()' 方法有什么作用？

Question

redis.publish(); method在下面的模块中做了什么

redis.publish("WordCountTopology", exclamatedWord.toString() + "|" + Long.toString(count));

public void execute(Tuple tuple)
    {
      String word = tuple.getString(0);

      StringBuilder exclamatedWord = new StringBuilder();
      exclamatedWord.append(word).append("!!!");

      _collector.emit(tuple, new Values(exclamatedWord.toString()));

      long count = 30;
      redis.publish("WordCountTopology", exclamatedWord.toString() + "|" + Long.toString(count));
    }

Answer 1

它将字符串 (ExclamatedWord + "|30") 发布到名为 WordCountTopology 的 Redis 频道 - 一旦 redis.publish 执行，该频道的订阅者将收到消息。

有关 Redis 的更多信息 Pub/Sub 请参阅：http://redis.io/topics/pubsub

Redis 'redis.publish()' 方法有什么作用？

What does the Redis 'redis.publish()' method do?

java

redis

lettuce