Emitters should allow registering a callback
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Key: S4-37
URL: https://issues.apache.org/jira/browse/S4-37
Project: Apache S4
Issue Type: New Feature
Affects Versions: 0.5
Reporter: Karthik Kambatla
Assignee: Karthik Kambatla
Fix For: 0.5
In the current state, emitters (udp, tcp, and others) send the messages across.
They do not necessarily acknowledge the information regarding the send
(success/failure) to the calling layer.
An ACK from the emitter is important to realize more complicated
emitter/listener protocols. For instance, to implement a ReplicationEmitter
(the message is sent to multiple nodes instead of one node, say for
fault-tolerance), the message should be processed only after it is replicated
the required number of times. So, if we are using TCP as the underlying layer,
it should callback when the operation succeeds.
I am eager to hear comments on (1) should we provision for complicated
protocols? (2) if so, is there any better way of going about things?
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