Re: Event to receive list of changed and not yet flushed objects

> On May 30, 2018, at 8:24 AM, [email protected] wrote:
> 
> Is there a mechanism by which one could get a list of changed and not yet flushed objects?
> 

You can poll this from the transaction manager:

https://groups.google.com/forum/#!topic/zodb/619id0c-lh8 <https://groups.google.com/forum/#!topic/zodb/619id0c-lh8>


> What I'm looking to do, is to hopefully
> 
> 1-Be notified through an event whenever an object is changed

...but you likely want to look into application-level pub-sub solutions.  Or use synchronous event system like zope.event.

> 2-Get the list of changed objects

See above.

> 3-Determine whether the number/size of changed objects justifies creating a savepoint to flush the objects from memory

Often this is application-specific, given the nature of what you are choosing to persist.  It might be hard to craft a generic solution introspecting the transaction manager and connection, unless your objects are all very similar in size.

Sean

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