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https://issues.apache.org/jira/browse/BOOKKEEPER-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13410004#comment-13410004
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Sijie Guo commented on BOOKKEEPER-220:
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@Matto @Ivan, I am thinking whether hedwig could leverage managed ledger. If we
want to use managed ledger, the big issue is that how to present Position. In
managed ledger, it use a combination of ledger id and entry id as a Position;
while in hedwig, it uses a incrementing long value as a Position.
So an idea I thought is that we could add in managed ledger is to make Position
as an interface, which allows different Position implementation on it.
{code}
public interface Position extends Comparable<Position> {
}
{code}
> Managed Ledger proposal
> -----------------------
>
> Key: BOOKKEEPER-220
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-220
> Project: Bookkeeper
> Issue Type: New Feature
> Components: bookkeeper-client
> Reporter: Matteo Merli
> Assignee: Matteo Merli
> Fix For: 4.2.0
>
> Attachments: 0001-BOOKKEEPER-220-Managed-Ledger-proposal.patch,
> 0001-BOOKKEEPER-220-Managed-Ledger-proposal.patch,
> 0001-BOOKKEEPER-220-Managed-Ledger-proposal.patch
>
>
> The ManagedLedger design is based on our need to manage a set of ledgers,
> with a single writer (at any point in time) and a set on consumers that read
> entries from it.
> The ManagedLedger also takes care of periodically closing ledgers to have a
> "reasonable" sized sets of ledgers that can individually deleted when no more
> needed.
> I've put on github the interface proposal (along with an early WIP
> implementation)
> http://github.com/merlimat/managed-ledger
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