A multipart message is just a message of many parts. You create a
multipart message by sending with the ZMQ.SNDMORE flag like this:
socket.send(myfirstbytes, ZMQ.SNDMORE);
socket.send(mysecondbytes, 0);
That would create a 2 part message. Its usually helpful for adding flags
for context switching (knowing what type of message is sent). You can
see this in some of the protocols like the paranoid pirate protocol
(http://rfc.zeromq.org/spec:6).
ZeroMQ looks at the multipart message atomically so it either all
arrives or it doesn't at all. The other implication is that you can't
"stream" parts of a message. It all needs to fit in memory.
You can determine if you have more parts to a message by using the
socket.hasRecvMore() method like this:
data = socket.recv(0);
while (socket.hasRecvMore()) {
moredata = sockect.recv(0);
// do something with moredata...
}
// no more parts to the message anymore
Joshua
On 9/21/2011 9:55 PM, jjmilk13 wrote:
Hi all
I'm using ZMQ in java.
And now I'm confusing about what ZMQ will do when I use the
multipart message.
Does it cut the messages piece by piece automatically?
What if id does,//I still don't know how big is piece it been cut
into?
And what if id does not, how can I deal with it?
Thanks
jinjing wu
_______________________________________________
zeromq-dev mailing list
[email protected]
http://lists.zeromq.org/mailman/listinfo/zeromq-dev
_______________________________________________
zeromq-dev mailing list
[email protected]
http://lists.zeromq.org/mailman/listinfo/zeromq-dev
