[zeromq-dev] about when use the message envelope

[QIUCHU]

HI , everyone!

I'm just learning the ZMQ, and reading the guid.

Now I'm really  confused by the message envelope.

In the section "The DEALER to REP Combination" of chapter 3 , the guide said
we should "emulate the envelope" by ourself. In the sample "rtreq:
ROUTER-to-REQ",  the code also construct the envelope when switch the
messages between the ROUTE and REQ socket.

But in the example "rrworker, rrclient, rrborker " and "mtserver" , the code
didn't construct the message envelope, and just send the data.  Especially,
in the rrbroker and rrworker , it's alse the DEALER to REP combination ,why
it didn't construct the envelope?

So my question is when I need construct the envelope by myself?  And why
some example didn't do it and some do it, what's the different?

Thank you so much!

Best regards!

Chu
 


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