Question: Sharing the Stream In Data Architecture with Observable - Part1

[BAZINGAyi]

Hi，I read the chapter by Sharing the Stream In Data Architecture with Observable . I have a question，I can't understand why to use publishRepaly(1) and refCount() method to collect messages.

First, I know publishRepaly(1) mean to save 1 value

Second, I know refCount() mean automate publish message and needn't use connect() method.

But, I don't know why to design for it.

Thx