[Kde-pim] Ping/Pong Loop between Mailtransport and KMail

[Kevin Krammer]

On Friday, 2010-07-16, Kevin Krammer wrote:
> Hi all,
> 
> while debugging Mailtransport related problems, I discovered a nice
> ping/pong inside KMail.
> 
> This is what happens:
> 
> 1) KMail's ETM lists a folder
> 2) Akonadi synchronizes the collection
> 3) KMKernel::instanceStatusChanged() goes "oooh, mail is being checked"
> 4) when "mail check" ends, KMMainWidget::slotEndCheckMail() decides to send
> queued messages
> 
> So far so good
> 
> 5) DispatcherInterface creates a FilterActionJob
> 6) FilterActionJob does and ItemFetchJob on the outbox
> 7) Akonadi synchronizes the outbox
> 8) -> (3)
> 
> Not sure where to fix this though.
> The most problematic part seems to be in KMKernel::instanceStatusChanged().
> Any of its agents switching to state "Running" is considered a mail check
> in progress.

It is basically a side effect of progress reporting, extened by Laurent in 
revision 1138325.

EnumSendOnCheck::SendOnManualChecks could probably be moved out of  
KMMainWidget::slotEndCheckMail() and triggered by the GUI action itself (would 
then run in parallel to the mail check)

EnumSendOnCheck::SendOnAllChecks could probably be removed, assuming the mail 
dispatcher agent has some kind of interval checking for queued mails.
It is not exactly the same behavior, e.g. happens more often if the dispatcher 
timeout is shorter than the check timeouts.

Cheers,
Kevin

-- 
Kevin Krammer, KDE developer, xdg-utils developer
KDE user support, developer mentoring
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