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Posted to dev@poi.apache.org by Timothy Spear <n6...@gmail.com> on 2022/03/24 20:49:15 UTC
Log4j
Curious,
I could not find in any ticket, wiki or documentation. Why the switch from
a facade like SL4J to direct log4j as the logging engine? Going direct to a
logging engine has caused me module conflicts and classpath problems as
multiple competing logging engines are required by separate libraries.
A facade such as SLF4J eliminates most of these types of issues.
Tim
Re: Log4j
Posted by Timothy Spear <n6...@gmail.com>.
Looks good me.
Thank you,
Tim
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________________________________
From: Dominik Stadler <do...@gmx.at>
Sent: Friday, March 25, 2022 2:40:17 AM
To: POI Developers List <de...@poi.apache.org>
Subject: Re: Log4j
The page is updated now to focus more on the state since Apache POI 5.1.0
and it also describes the options with slf4j a bit more.
Let us know if you think more content would be useful.
Thanks... Dominik.
On Thu, Mar 24, 2022 at 10:12 PM Timothy Spear <n6...@gmail.com> wrote:
> Ah, then the second line in the link below states POI from 5.1.0 uses log4j
> directly left myself and a few other developers confused. Probably should
> have just checked the code. Did not think of that until you replied....
> https://poi.apache.org/components/logging.html
>
> Thanks,
>
> Tim
>
> On Thu, Mar 24, 2022 at 5:00 PM PJ Fanning <fa...@yahoo.com.invalid>
> wrote:
>
> > We do use a facade - log4j-api - you can then choose which compatible
> impl
> > to use.
> > * log4j-core is one impl
> > * log4j-slf4j-impl is an impl that bridges to slf4j -
> > https://github.com/pjfanning/poi-gradle-example/blob/main/build.gradle
> > uses that bridge and use slf4j-simple as the log framework.
> >
> > https://poi.apache.org/components/logging.html has extra details.
> >
> >
> >
> >
> >
> >
> > On Thursday 24 March 2022, 21:50:13 GMT+1, Timothy Spear <
> n614cd@gmail.com>
> > wrote:
> >
> >
> >
> >
> >
> > Curious,
> >
> > I could not find in any ticket, wiki or documentation. Why the switch
> from
> > a facade like SL4J to direct log4j as the logging engine? Going direct
> to a
> > logging engine has caused me module conflicts and classpath problems as
> > multiple competing logging engines are required by separate libraries.
> >
> > A facade such as SLF4J eliminates most of these types of issues.
> >
> > Tim
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: dev-unsubscribe@poi.apache.org
> > For additional commands, e-mail: dev-help@poi.apache.org
> >
> >
>
Re: Log4j
Posted by Dominik Stadler <do...@gmx.at>.
The page is updated now to focus more on the state since Apache POI 5.1.0
and it also describes the options with slf4j a bit more.
Let us know if you think more content would be useful.
Thanks... Dominik.
On Thu, Mar 24, 2022 at 10:12 PM Timothy Spear <n6...@gmail.com> wrote:
> Ah, then the second line in the link below states POI from 5.1.0 uses log4j
> directly left myself and a few other developers confused. Probably should
> have just checked the code. Did not think of that until you replied....
> https://poi.apache.org/components/logging.html
>
> Thanks,
>
> Tim
>
> On Thu, Mar 24, 2022 at 5:00 PM PJ Fanning <fa...@yahoo.com.invalid>
> wrote:
>
> > We do use a facade - log4j-api - you can then choose which compatible
> impl
> > to use.
> > * log4j-core is one impl
> > * log4j-slf4j-impl is an impl that bridges to slf4j -
> > https://github.com/pjfanning/poi-gradle-example/blob/main/build.gradle
> > uses that bridge and use slf4j-simple as the log framework.
> >
> > https://poi.apache.org/components/logging.html has extra details.
> >
> >
> >
> >
> >
> >
> > On Thursday 24 March 2022, 21:50:13 GMT+1, Timothy Spear <
> n614cd@gmail.com>
> > wrote:
> >
> >
> >
> >
> >
> > Curious,
> >
> > I could not find in any ticket, wiki or documentation. Why the switch
> from
> > a facade like SL4J to direct log4j as the logging engine? Going direct
> to a
> > logging engine has caused me module conflicts and classpath problems as
> > multiple competing logging engines are required by separate libraries.
> >
> > A facade such as SLF4J eliminates most of these types of issues.
> >
> > Tim
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: dev-unsubscribe@poi.apache.org
> > For additional commands, e-mail: dev-help@poi.apache.org
> >
> >
>
Re: Log4j
Posted by Timothy Spear <n6...@gmail.com>.
Ah, then the second line in the link below states POI from 5.1.0 uses log4j
directly left myself and a few other developers confused. Probably should
have just checked the code. Did not think of that until you replied....
https://poi.apache.org/components/logging.html
Thanks,
Tim
On Thu, Mar 24, 2022 at 5:00 PM PJ Fanning <fa...@yahoo.com.invalid>
wrote:
> We do use a facade - log4j-api - you can then choose which compatible impl
> to use.
> * log4j-core is one impl
> * log4j-slf4j-impl is an impl that bridges to slf4j -
> https://github.com/pjfanning/poi-gradle-example/blob/main/build.gradle
> uses that bridge and use slf4j-simple as the log framework.
>
> https://poi.apache.org/components/logging.html has extra details.
>
>
>
>
>
>
> On Thursday 24 March 2022, 21:50:13 GMT+1, Timothy Spear <n6...@gmail.com>
> wrote:
>
>
>
>
>
> Curious,
>
> I could not find in any ticket, wiki or documentation. Why the switch from
> a facade like SL4J to direct log4j as the logging engine? Going direct to a
> logging engine has caused me module conflicts and classpath problems as
> multiple competing logging engines are required by separate libraries.
>
> A facade such as SLF4J eliminates most of these types of issues.
>
> Tim
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: dev-unsubscribe@poi.apache.org
> For additional commands, e-mail: dev-help@poi.apache.org
>
>
Re: Log4j
Posted by PJ Fanning <fa...@yahoo.com.INVALID>.
We do use a facade - log4j-api - you can then choose which compatible impl to use.
* log4j-core is one impl
* log4j-slf4j-impl is an impl that bridges to slf4j - https://github.com/pjfanning/poi-gradle-example/blob/main/build.gradle uses that bridge and use slf4j-simple as the log framework.
https://poi.apache.org/components/logging.html has extra details.
On Thursday 24 March 2022, 21:50:13 GMT+1, Timothy Spear <n6...@gmail.com> wrote:
Curious,
I could not find in any ticket, wiki or documentation. Why the switch from
a facade like SL4J to direct log4j as the logging engine? Going direct to a
logging engine has caused me module conflicts and classpath problems as
multiple competing logging engines are required by separate libraries.
A facade such as SLF4J eliminates most of these types of issues.
Tim
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