Ted Ross created DISPATCH-15:
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Summary: Add different forwarding semantics for addresses
Key: DISPATCH-15
URL: https://issues.apache.org/jira/browse/DISPATCH-15
Project: Qpid Dispatch
Issue Type: Improvement
Affects Versions: 0.1
Reporter: Ted Ross
Assignee: Ted Ross
Fix For: 0.2
At present, if there are multiple receivers for a particular address, Dispatch
delivers a copy of each message to all of the receivers. This feature adds the
ability to by-configuration deliver messages to only one of those receivers.
The configuration for this feature is per-address and defines two settings:
- _fanout_ is either Multiple or Single (and a placeholder for Group).
Multiple fanout means all subscribers receive each message. Single fanout
means that only one subscriber receives the message.
- _bias_ controls how single-fanout is treated. The following values for bias
are provided:
-- _Closest_ - each message is delivered to the closest/least-cost
subscriber.
-- _Spread_ - messages are spread indeterminately across all subscribers.
-- _Latency_ - (not implemented yet) Messages are delivered in a balanced
way to all subscribers based on the latency of acknowledgements. This mode
attempts to keep all subscribers equally fed with incoming messages.
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