[jboss-jira] [JBoss JIRA] (JGRP-1700) STABLE: use a bit set instead of a hash set for votes

[Bela Ban (JIRA)]

Bela Ban created JGRP-1700:
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             Summary: STABLE: use a bit set instead of a hash set for votes
                 Key: JGRP-1700
                 URL: https://issues.jboss.org/browse/JGRP-1700
             Project: JGroups
          Issue Type: Enhancement
            Reporter: Bela Ban
            Assignee: Bela Ban
             Fix For: 3.4


Currently, the votes hashset is cleared when the digest is reset, and then votes are added as STABLE messages come in. However, since the digest is based on an Address[] membership, we could create a FixedSizeBitSet, and the bit to set when a STABLE msg is received is computed as the sender's rank in that membership. When all bits are set, we can send a STABILITY message (= all votes have been received).
This takes up less space than a hashset.

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