MobileRead Forums - View Single Post - What is the calibre shutdown (exit) process?

lrpirlet · 08-10-2022, 09:19 AM

I have developed a plugin based on webengine_demo_plugin.zip.

This plugin, noosfere_util, allows to manually select the metadata from one of the editions of the book in noosfere site.

To do that I open a web browser in a separate process, go to the page of the book, find the reference. Noosfere_util then sends the reference to main calibre using temporary files. I synchronize both main calibre and noosfere_util via temporary files. Later I use noosfere DB metadata plugin to upload the metadata I want.

Everything seems to work ok... provided I suppress any access to main calibre while noosfere_util gui is active. If I press the closing X of the main calibre gui, before I terminate the noosfere_util, then I get "The main calibre program" process still running and NO gui anymore to stop it... If I run calibre in debug mode, and kill main calibre before noosfere_util, "The main calibre program" process is gone while the debug process console is hidden somewhere...

If I try to restart calibre, it complains about not being able to contact calibre, please restart calibre...

I guess (I hope) there is a call to to an abort procedure in every plugin, or a signal is emitted when main calibre is shutdown... But I cannot find it (I may be blind

)

Thank in advance for any hint.

08-10-2022, 09:19 AM	#1
lrpirlet Connoisseur Posts: 96 Karma: 40 Join Date: Mar 2020 Location: Belgium (sorry, I am from the Walloon side of the country and I speak french only) Device: PW3, Kobo Libra H2O	What is the calibre shutdown (exit) process? I have developed a plugin based on webengine_demo_plugin.zip. This plugin, noosfere_util, allows to manually select the metadata from one of the editions of the book in noosfere site. To do that I open a web browser in a separate process, go to the page of the book, find the reference. Noosfere_util then sends the reference to main calibre using temporary files. I synchronize both main calibre and noosfere_util via temporary files. Later I use noosfere DB metadata plugin to upload the metadata I want. Everything seems to work ok... provided I suppress any access to main calibre while noosfere_util gui is active. If I press the closing X of the main calibre gui, before I terminate the noosfere_util, then I get "The main calibre program" process still running and NO gui anymore to stop it... If I run calibre in debug mode, and kill main calibre before noosfere_util, "The main calibre program" process is gone while the debug process console is hidden somewhere... If I try to restart calibre, it complains about not being able to contact calibre, please restart calibre... I guess (I hope) there is a call to to an abort procedure in every plugin, or a signal is emitted when main calibre is shutdown... But I cannot find it (I may be blind ) Thank in advance for any hint. Last edited by lrpirlet; 08-10-2022 at 11:02 AM.