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https://issues.apache.org/jira/browse/PROTON-2868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17921558#comment-17921558
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ASF subversion and git services commented on PROTON-2868:
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Commit e366bcde8c5347dbfd089b8d5a10a71ed7775c74 in qpid-proton's branch
refs/heads/main from Andrew Stitcher
[ https://gitbox.apache.org/repos/asf?p=qpid-proton.git;h=e366bcde8 ]
PROTON-2868: [Python] Simplify C object wrapping code
- Cleanup the Wrapper code so that it uses more current less magical
idiomatic python to wrap the C python objects that need to be passed
via the Proton event queue.
- Use __new__ rather than __init__ because we are dealing with
creating the objects rather than just initialising their values
- Use slots because the actual python objects only have 2 fixed
attributes.
- Instead of passing constructor and get_context functions to the
wrapper these are now declarative class variables defined in the
wrapped classes.
- The wrapped classes can now use __init__ more normally: They do still
have to check whether they are already initialised, and not initialise
again if they are, because they could be wrapping a stored away object
that has already been initialised and used rather than a new wrapping.
- We now provide a general wrap classmethod that can bew used for most
of the wrapped types and avoid duplicating the code.
- Needed to add a custom __new__ to Transport because its constructor
parameters aren't compatible with the Wrapper class.
- Transport still needs its custom wrap method for the same reason.
- The SASL class is no longer a wrapped class (and actually never needed
to be one).
> Improve and simplify the scheme for wrapping C Proton objects in Python
> -----------------------------------------------------------------------
>
> Key: PROTON-2868
> URL: https://issues.apache.org/jira/browse/PROTON-2868
> Project: Qpid Proton
> Issue Type: Improvement
> Components: python-binding
> Reporter: Andrew Stitcher
> Assignee: Andrew Stitcher
> Priority: Major
>
> The code used to wrap C Proton objects in Python objects when the objects
> need to passed via the proton event queue is difficult ot understand and uses
> unidiomatic python.
> It can be rewritten for better maintainability and comprehensibility.
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