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https://issues.apache.org/jira/browse/LOG4J2-155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13591865#comment-13591865
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Ralph Goers commented on LOG4J2-155:
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First, you will notice that the attributes on the configuration element have to
be specially handled in XMLConfiguration, JSONConfiguration and any other
specific Configuration implementations. Second, attributes on XML elements must
always be Strings as processAttributes returns Map<String, String>. So if you
want to specify advertiser="XXX" then "XXX" will be a String. However, you
could then do
final PluginType type = getPluginManager().getPluginType(name);
where "name" has the value "XXX". From the PluginType you can get the class to
created.
OTOH, if you want to support their being multiple advertisers (does that even
make sense?) then you would want to add an <advertisers> element to the
configuration and then handle that in BaseConfiguration just as properties,
appenders and loggers are now. When support for receivers is added I would
expect that would be added in the same manner.
In any case, I suspect the elementType you want to use is "advertiser".
> 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-feb24-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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