[logback-user] Appender Ref Default Value

[David Harrigan]

Hiya,

I love the fact that in logback I can do this for a level:

<logger name="foo" level="${foo.bar.log.level:-debug}"/>

I would love to be able to do the following as well:

<appender-ref ref="${foo.bar.log.appender:-console}"/>

So that I can switch between different appenders during build time. At the
moment, If I try that, I get this warning from logback (0.9.21)

11:17:32,676 |-ERROR in ch.qos.logback.core.joran.action.AppenderRefAction -
Could not find an appender named [${foo.bar.log.appender:-console}]. Did you
define it below in the config file?
11:17:32,676 |-ERROR in ch.qos.logback.core.joran.action.AppenderRefAction -
See http://logback.qos.ch/codes.html#appender_order for more details.

Is this achievable?

-=david=-

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