Roger Kapsi created LOG4J2-1531:
-----------------------------------
Summary: Change attribute and component values from String to
Object
Key: LOG4J2-1531
URL: https://issues.apache.org/jira/browse/LOG4J2-1531
Project: Log4j 2
Issue Type: Improvement
Components: Core
Affects Versions: 2.6.2
Reporter: Roger Kapsi
I was looking into creating a ConfigurationFactory/Builder that is backed by a
Clojure DSL. It works rather beautifully until I tried to create a filter that
is backed by a Clojure function. There is literally no way to pass arbitrary
objects into a PluginFactory. All component values and attributes are assumed
to be Strings.
{code:java}
(configuration
(appender "stdout" "CONSOLE"
(layout "PatternLayout"
(attribute "pattern" "%d [%t] %-5level: %msg%n"))
(filter "ClojureFilter"
;; This LoC doesn't work: addAttribute(key, value)
;; will store the toString() of the value. Bummer.
;; I'd the so easy and beautiful if it didn't.
(attribute "fn" (fn [logger & more] (println logger)))))
(logger "TestLogger" Level/INFO
(appender-ref "rolling")
(attribute "additivity" false))
(root-logger Level/DEBUG
(appender-ref "rolling")))
{code}
{code:java}
@Plugin(name = "ClojureFilter", category = Node.CATEGORY, elementType =
Filter.ELEMENT_TYPE, printObject = true)
class ClojureFilter extends AbstractFilter {
@PluginFactory
public static ClojureFilter createFilter(
@PluginAttribute("fn") IFn fn, ...) {
return new ClojureFilter(fn, ...);
}
}
{code}
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