[jboss-jira] [JBoss JIRA] (JGRP-1396) NAKACK2: merge NakReceiverWindow and Retransmitter

[Bela Ban (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-1396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12655494#comment-12655494 ] 

Bela Ban commented on JGRP-1396:
--------------------------------

OK, I think the ultimate solution is now:

#1 Extend RetransmitTable to keep track of low, hd and hr. Remove() or removeMany() can also advance low if nullify=true

#2 Use RetransmitTable in NAKACK directly, rather than NakReceiverWindow, trash the latter (ditto for UNICAST2)

#3 Create *one* single retransmit task, periodically scanning the RetransmiTables for gaps and triggering retransmission if needed
                
> NAKACK2: merge NakReceiverWindow and Retransmitter
> --------------------------------------------------
>
>                 Key: JGRP-1396
>                 URL: https://issues.jboss.org/browse/JGRP-1396
>             Project: JGroups
>          Issue Type: Enhancement
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 3.1
>
>
> Both NakReceiverWindow and Retransmitter use their own data structures to keep a list of messages received (NRW) and seqnos to be retransmitted (Retrasmitter). This is redundant and costly memory-wise.
> I suggest let's merge the 2 classes, or at least let them share the data structure which keeps track of received messages.
> Suggestion II: create a ring buffer with a (changeable) capacity that keeps track of received messages and messages to be retransmitted.

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