Queue example: Multi-subscriber example using TTL and ACQUIRE_MODE_NOT_ACQUIRE
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Key: QPID-1595
URL: https://issues.apache.org/jira/browse/QPID-1595
Project: Qpid
Issue Type: Improvement
Components: Qpid Examples
Affects Versions: M4
Reporter: William Henry
Currently the examples tend to focus on the different types of exchanges.
The attached files demonstrate an example that focuses more on queue
configurations.
Using a amq:topic exchange several topic based queues are declared with
specific topic bindings. These are the same bindings as used in the normal
pub/sub example.
The queues are declared as non-exclusive so that they can be shared b y
multiple consumers (subscribers).
The topic publisher publishes messages to the amq:topic exchange with a TTL
properties set so that the messages will time out after a certain point and
will not remain on the queue. I.e. they have a Time-to-live and therefore the
messages are out of date and irrelevant after that TTL. (at some point we
should address this on the consumer side and let the consumer decide the TTL).
The topic_listener subscribes to the queues with ACQUIRE_MODE_NOT_ACQUIRE. i.e.
the listners are browsing the messages and therefore leaving them on the queue.
This example is similar to how some financial institutions may want to share
information on shared queues but the information only has relevance for a
certain amount of time.
I'd like to write up a description of this use case with code on the site
somewhere. Where is appropriate? FAQ? Elsewhere? It would be useful to provide
several consumer side patterns of queue configuration etc.
Also should I also develop python, java,etc. examples of the same?
Hmmm where to I attach the files? I'll create first and then attach.
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