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From "Martin Ritchie (JIRA)" <qpid-...@incubator.apache.org>
Subject [jira] Assigned: (QPID-1764) Create Abstract base class to perform new reference counting for TransactionLog
Date Mon, 06 Apr 2009 10:08:13 GMT

     [ https://issues.apache.org/jira/browse/QPID-1764?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Martin Ritchie reassigned QPID-1764:

    Assignee: Aidan Skinner  (was: Martin Ritchie)

Hi Aidan, can you review this change please.

> Create Abstract base class to perform new reference counting for TransactionLog
> -------------------------------------------------------------------------------
>                 Key: QPID-1764
>                 URL: https://issues.apache.org/jira/browse/QPID-1764
>             Project: Qpid
>          Issue Type: Bug
>          Components: Performance
>            Reporter: Martin Ritchie
>            Assignee: Aidan Skinner
>            Priority: Blocker
>             Fix For: 0.5
> Summary:
> Summary the introduction of the new TransactionLog interface over the old MessageStore
has resulted in each of the old Stores performing their own reference counting. As a result
they all suffer from:
> a) Being different implementations
> b) Not being fully tested by existing test frameworks.
> By creating a single reference counting TransactionLog base class that delegates the
simple storage and retreival tasks to the underlying Stores the stores can be simpler and
the testing more complete.
> Current testing has already shown that performance has knocked 5% by the MemoryMessageStore's
implementation of  reference counting when it should not need to be doing any reference counting.
> This was brought up during the FtD Code review
> http://cwiki.apache.org/confluence/display/qpid/FtD+Code+Review+Notes

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