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https://issues.apache.org/jira/browse/LOG4J2-155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13583870#comment-13583870
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Scott Deboy commented on LOG4J2-155:
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MulticastDNS/Bonjour/Rendezvous/ZeroConf is useful when you don't want or need
central infrastructure - it is more for ad hoc discovery. With mDNS there is
no central server to manage, you just have to be able to see the discovery
messages on your local network in order to take advantage of the advertised
service.
You bring up an important point that I should abstract the 'advertisement' away
from one specific implementation (ZeroConf). The plumbing/data necessary in
order to actually automate things is still necessary, but the fact that it is
advertised via ZeroConf, or a custom database, or something else, is a good
point - particularly when the infrastructure that is doing the advertising
isn't accessible via multicast to the endpoint needing to use the advertisement.
I will work on adding a layer of abstraction there - if you have any
suggestions let me know. I plan on only mapping ZeroConf discovery initially,
but I definitely see value there.
Scott
> add getFormat to Layout
> -----------------------
>
> Key: LOG4J2-155
> URL: https://issues.apache.org/jira/browse/LOG4J2-155
> Project: Log4j 2
> Issue Type: Improvement
> Reporter: Scott Deboy
> Attachments: log4j2-155-feb21-rev1.patch,
> log4j2-155-jan22-rev1.patch, log4j2-155-jan23-rev1.patch
>
>
> I was looking at an old rev - getContentType is now exposed - thanks!
> Now if we could add a 'getFormat':
> It would be useful to expose information about a Layout's format.
> If the content type is text/plain, exposing the layout format as a conversion
> pattern would work fine.
> If the content type is text/html or text/xml we could expose something else
> (or null).
> My primary interest is adding the ability to 'discover' the file-based
> logging configurations in order to support them via Chainsaw and multicast
> DNS.
> If all Layouts supporting text/plain content types exposed their format as a
> conversion pattern, and the file-based appenders (optionally) provided the
> ability to advertise their configuration, the files could be remotely tailed
> without the far endpoint even knowing anything about the file configuration.
> For an example, see how multicast appenders are exposed via
> zeroconf/multicast dns in log4j 1.x in activateOptions - something very
> similar could be done with contenttype and format properties in a
> fileappender with a layout.
> if (advertiseViaMulticastDNS) {
> Map properties = new HashMap();
> properties.put("multicastAddress", remoteHost);
> zeroConf = new ZeroConfSupport(ZONE, port, getName(), properties);
> zeroConf.advertise();
> }
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