[Zope] Zope 4 migration

[Michael Brunnbauer]

Hello Michael,

thanks. I'll install Products.TemporaryFolder to avoid the warnings but will 
replace /temp_folder with a normal folder as recommended by the maintainers
of the Sessions product. Now let's see how the more complicated setups cope
with Zope 4 - LOL.

Regards,

Michael Brunnbauer

On Fri, Dec 13, 2019 at 07:46:29AM +0100, Michael Howitz wrote:
> Am 12.12.2019 um 10:22 schrieb Michael Brunnbauer <brunni at netestate.de>:
> [???]
> > Thank you very much for your help. I have some reservations about installing
> > Products.TemporaryFolder.
> 
> You seem only to need ZODBMountPoint. But maybe you do not use server side sessions so you can live without TemporaryFolder which needs ZODBMountPoint to mount the temporary folder.
> There is https://github.com/zopefoundation/Products.TemporaryFolder/issues/12 to extract ZODBMountPoint into its own package. Feel free to comment there if you actually need ZODBMountPoint without TemporaryFolder.
> 
> > See here:
> > 
> > https://pypi.org/project/Products.Sessions/
> > 
> > "The default session support under Zope 2 relied on Products.TemporaryFolder
> >  for storing session data, which in turn used the tempstorage package.
> >  tempstorage is no longer recommended because it has unfixed and possibly
> >  unfixable issues under Zope 4 that lead to corrupted temporary storages.???
> 
> This is only the case when using tempstorage, a RAM based storage implementation.
> You could also configure an additional ZODB for the server side session data and mount it instead of using Products.TemporaryFolder.
> This makes server side sessions persistent between restarts.
> 
> > Also, for me this means installing 8 Products after installing Zope with pip:
> > Sessions, ExternalMethod, PythonScripts, ZSQLMethods, ZMySQLDA, MailHost,
> > TemporaryFolder, SiteErrorLog.
> 
> That???s right, some Products were part of Zope2 or install dependencies.
> Zope 4 is a but more lightweight. So you have to install the Products you need.
> 
> > Would the standard zc.buildout install already contain some of those?
> 
> No, you have to add them to buildout.cfg.
> 
> > I somehow got attached to the pip way over the years but maybe I should
> > really switch.
> 
> If you know how to use pip: It???s okay to use it.
> I personally find Buildout more convenient.
> 
> --
> Mit freundlichen Grüßen
> Michael Howitz
> 



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