On 01/25/2011 11:08 AM, [email protected] wrote:
Hi there,
According to following link
http://qpid.apache.org/books/0.8/Programming-In-Apache-Qpid/html/ch02s04.html#id3068029
subjects can be used to direct messages to different destinations. Routing
and binding keys can used for the same purpose. So what is the difference
between subjects and routing keys?
Best Regards,
Sergey
Sergey,
They are overlapping concepts, 'subject' being the more general of the
two. A subject is part of the address used in the new API and is also a
header in the message envelope. The routing-key is specific to the AMQP
0-10 specification.
The new API is intended to support existing AMQP protocol versions as
well as AMQP 1.0. The mapping of the API to AMQP 0-10 sets the routing
key of a message to the subject value. If there is no subject, it uses
the subject part of the Sender address.
-Ted
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