[logback-user] Manifest Question

Mon Mar 13 16:35:35 CET 2017

To get the Maven information we use the Manifest and if the
/META-INF/MANIFEST.MF doesn't exist we then create a fake one from the
pom.xml file in the ${user.dir}. The reason you don't always have the
Manifest (or it is empty) is if you run the project with out building it
(ie using Eclipse or Intellij).

It is fairly easy to make Maven add info to the Manifest (google it). I'm
not sure why it isn't the default.

The code that parses and normalizes between either a MANIFEST.MF or pom.xml
is here:
https://gist.github.com/agentgt/997d7662f4942b4127525a8478ce6a95 (see
fromPom and fromManifest).

I suppose I could make it read pom.properties as well (I believe though
there is information missing from pom.properties).

Once you create PomManifest you can store it as a static singleton
somewhere in your app (you can use servlet context attributes as well or
whatever your comfortable with).

On Mon, Mar 13, 2017 at 8:25 AM, Andrew Feller <afeller at bandwidth.com>
wrote:

> Thanks for the feedback David, Adam!  I actually am outfitting a variety
> of Java apps with the logstash-logback-encoder for storing logs in ELK /
> Elasticstack and was aiming to store implementation info in MDC so it would
> be available.
>
> Aside from the suggestions both of you offered, I had only 2 other ideas:
>
>    1. Have logback read maven-generated pom.properties under META-INF for
>    version, artifactId, groupId
>    2. Create a custom context listener as described in StackOverflow
>    question
>    <http://stackoverflow.com/questions/1975939/read-environment-variables-from-logback-configuration-file/23969706#23969706> that
>    would figure out the main class and lookup it's implementation info
>
> Customizing the appender seems weird since it's concern is persisting log
> events to an external system (ELK, file, syslog, etc).
>
> On Sun, Mar 12, 2017 at 11:05 AM, <logback-user-request at qos.ch> wrote:
>
>>
>> Date: Sun, 12 Mar 2017 11:04:39 -0400
>> From: Adam Gent <adam.gent at snaphop.com>
>> To: logback users list <logback-user at qos.ch>
>> Subject: Re: [logback-user] Manifest Question
>> Message-ID:
>>         <CAG4f71u9ye=Uog0n5wUY-J3tDjdg6Tw67LoOVN8A6ODMxMy7eA at mail.
>> gmail.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>> The appender way is the easiest way but there are bunch of caveats to that
>> method. We used to do it this way but needed more flexibility.
>>
>> If you are going to do it the custom Appender way I recommend not using
>> the
>> MDC. You also can really only have pretty static attributes.
>>
>> For example for Spring MVC we actually add the routing path to the MDC and
>> thus the Appender would not be helpful.
>>
>> Yeah you could make a unified thread local context that your custom
>> appender uses but that is basically what the MDC is.
>>
>> There is also the tricky biz of handing of dynamic MDC information to
>> child
>> threads. Again for example for every request we generate a uuid so that we
>> can track that request and everything it executes.
>>
>> But if your attributes are mainly static I agree that the custom appender
>> is the route to go.... I feel stupid for not mentioning it first.
>>
>> On Sun, Mar 12, 2017 at 8:51 AM, David Tkaczyk <davidtkaczyk69 at gmail.com>
>> wrote:
>>
>> > Extend your preferred appender.
>> >
>> > On Mar 12, 2017 6:59 AM, <logback-user-request at qos.ch> wrote:
>> >
>> >> Send logback-user mailing list submissions to
>> >>         logback-user at qos.ch
>> >>
>> >> To subscribe or unsubscribe via the World Wide Web, visit
>> >>         http://mailman.qos.ch/mailman/listinfo/logback-user
>> >> or, via email, send a message with subject or body 'help' to
>> >>         logback-user-request at qos.ch
>> >>
>> >> You can reach the person managing the list at
>> >>         logback-user-owner at qos.ch
>> >>
>> >> When replying, please edit your Subject line so it is more specific
>> >> than "Re: Contents of logback-user digest..."
>> >>
>> >> Today's Topics:
>> >>
>> >>    1. Recommendations on including manifest implementation
>> >>       information into logging events (Andrew Feller)
>> >>
>> >>
>> >> ---------- Forwarded message ----------
>> >> From: Andrew Feller <afeller at bandwidth.com>
>> >> To: logback-user at qos.ch
>> >> Cc:
>> >> Bcc:
>> >> Date: Sat, 11 Mar 2017 14:59:35 -0500
>> >> Subject: [logback-user] Recommendations on including manifest
>> >> implementation information into logging events
>> >> Does anyone have recommendations on how to best to add manifest
>> >> implementation information (Implementation-Title,
>> Implementation-Version,
>> >> etc) to logback MDC trivially?
>> >>
>> >> I know this information can retrieved programmatically from a package (
>> >> Package.getImplementationTitle()
>> >> <https://docs.oracle.com/javase/8/docs/api/java/lang/Package
>> .html#getImplementationTitle-->,
>> >> Package.getImplementationVersion()
>> >> <https://docs.oracle.com/javase/8/docs/api/java/lang/Package
>> .html#getImplementationVersion-->,
>> >> etc), but I'd rather avoid having every application hardcode logic on
>> >> startup to determine this and stash it in MDC for later use.  I would
>> also
>> >> like to avoid hard coding this information within logback.xml /
>> >> logback-spring.xml as the manifest is the source of truth.
>> >>
>> >> Any recommendations would be greatly appreciated!
>> >> --
>> >>
>> >> [image: email-signature-logo.jpg]
>> >>
>> >> *Andy Feller*
>> >>
>> >> Sr. DevOps Engineer
>> >> 900 Main Campus Drive, Suite 500
>> >>
>> >> Raleigh, NC 27606
>> >>
>> >> Bandwidth <http://www.bandwidth.com/>
>> >> <http://www.bandwidth.com/>e afeller at bandwidth.com
>> >>
>> >> _______________________________________________
>> >> logback-user mailing list
>> >> logback-user at qos.ch
>> >> http://mailman.qos.ch/mailman/listinfo/logback-user
>> >>
>> >
>> > _______________________________________________
>> > logback-user mailing list
>> > logback-user at qos.ch
>> > http://mailman.qos.ch/mailman/listinfo/logback-user
>> >
>>
>>
>>
>> --
>> CTO
>> SnapHop (snaphop.com)
>> (twitter) @agentgt (linkedin) http://www.linkedin.com/in/agentgt (cell)
>> 781-883-5182
>> -------------- next part --------------
>> An HTML attachment was scrubbed...
>> URL: <http://mailman.qos.ch/pipermail/logback-user/attachments/
>> 20170312/7204c9d0/attachment.html>
>>
>> ------------------------------
>>
>> Subject: Digest Footer
>>
>> _______________________________________________
>> logback-user mailing list
>> logback-user at qos.ch
>> http://mailman.qos.ch/mailman/listinfo/logback-user
>>
>> ------------------------------
>>
>> End of logback-user Digest, Vol 66, Issue 2
>> *******************************************
>>
>
>
>
> --
>
> [image: email-signature-logo.jpg]
>
> *Andy Feller*
>
> Sr. DevOps Engineer
> 900 Main Campus Drive, Suite 500
>
> Raleigh, NC 27606
>
> Bandwidth <http://www.bandwidth.com/>
> <http://www.bandwidth.com/>e afeller at bandwidth.com
>
> _______________________________________________
> logback-user mailing list
> logback-user at qos.ch
> http://mailman.qos.ch/mailman/listinfo/logback-user
>

-- 
CTO
SnapHop (snaphop.com)
(twitter) @agentgt (linkedin) http://www.linkedin.com/in/agentgt (cell)
781-883-5182
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qos.ch/pipermail/logback-user/attachments/20170313/2f4c084a/attachment-0001.html>