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<p class=MsoPlainText>Hi,<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>I'm trying to get a handle on ordering semantics on the
topic exchange.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Assume there are two publishers, each on their own
channel. Publishers produce a stream of messages. So:<o:p></o:p></p>
<p class=MsoPlainText>Publisher A produces A1, A2, A3 (in that order) Publisher
B produces B1, B2, B3 (in that order)<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>There is a single subscriber on a queue that all the
messages produced by both publishers are targeted to.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Questions:<o:p></o:p></p>
<p class=MsoPlainText>1. Messages A1, A2, A3 are received in that order.
Messages B1, B2, B3 are received in that order. Correct?<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>2. Messages from A can be interleaved from B as in: A1,
A2, B1, B2, B3, A3. (Still subject to the constraint from question 1 above)
Correct?<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>3. In the event of a failure of a node in a cluster,
messages may be lost, but do they still obey the strict ordering, even though
messages may travel a different route in the cluster?<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>4. I’m assuming that the ordering semantics guaranteed
per-channel, correct?<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>5.Can a subscriber determine a unique ID of the actual
sender (i.e., can a subscriber know if a message was sent by A or B)?<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Thanks,<o:p></o:p></p>
<p class=MsoPlainText>Jim<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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