On 03/19/2013 02:55 PM, Rajith Attapattu wrote:
Speaking with Gordon, I came to the conclusion that we first need to
figure out what we mean by Equals.
Does equals mean,
If two consumers used the same destination, they should both receive
the same messages (or share, in a shared queue).
If two producers use the same destination, they should both send
messages to the same (queue/exchange ?)
The main use of equals I can think of involves a test for equivalence.
E.g. I may have a producer for Destination A and want to know whether I
can use that instead of creating a new producer for Destination B. If A
equals B, I can assume they are equivalent, my existing producer is
equivalent to creating a new one.
In this case my-queue/subject1 is *not* equivalent to my-queue/subject2
(neither is my-exchange/subject1 equivalent to my-exchange/subject2). I
would therefore argue that the subject *is* relevant for equality.
The same applies if we consider consumers rather than producers.
I would also note that in this sort of use case it is safer to return
false from equals than it is to return true.
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