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https://issues.apache.org/jira/browse/BOOKKEEPER-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13293331#comment-13293331
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Sijie Guo commented on BOOKKEEPER-220:
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{quote}
BK async method. For example, asyncAddEntry can require to create a new ledger
if the current one is full. That would mean to call bk.asyncCreateLedger() and
in the callback use the newly created ledger with ledger.asyncAddEntry(). Is
this feasable? I think (maybe I'm wrong) that it's not safe to call BK api
methods from inside a BK callback.
{quote}
I think BookKeeperPersistenceManager in hedwig is a good reference for this
case.
> 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
>
>
> 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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