Hi Andy,
When you write "%a(%x %y)" then %x and %y are child converters for %a.
So, in the case of "%debug(%level %d %t)", the converters %level,%d and
%t are children of %debug. %debug is said to be a composite converter
and the parenthesis () is sort of a composition operator.
For your particular case, you need to sub-class CompositeConverter. See
the implementation for HighlightingCompositeConverter (and
ForegroundCompositeConverterBase). Look at the code for
CompositeConverter ND notice how the convert() method of
CompositeConverter delegates to child converters and only at the end
transforms the results.
I hope this helps,
--
Ceki
On 4/15/2015 3:12, Andrew E. Davidson wrote:
Hi Ceki
Alternatively, you could write a custom conversion specifier. If you
had a specifier called %debug which output contents only for level
DEBUG, and a %warn specifier which output contents only for level WARN
and another specifier %ERROR which output contents for ERROR, your
pattern could be written as
%debug(%level %d %t) %error(%level) %info(%level) %m%n
See http://logback.qos.ch/manual/layouts.html#customConversionSpecifier
for documentation on this topic.
I tried your “custom conversion specifier” approach. I think I am
missing something. In your logback.xml it looks like you are able to
pass arguments. I used a debugger how ever it did not appear like the
the ILoggingEvent had anything particularly useful other then the level
and thread Name values. List<String> optionList= getOptionList(); gives
me [%level %d %t] how ever the values have not been expanded
Your solution is very close to what I want to do.
Thanks in advance
Andy
public class DebugConverter extends ClassicConverter {
public DebugConverter() {
// TODO Auto-generated constructor stub
}
@Override
public String convert(ILoggingEvent event) {
List<String> optionList = getOptionList();
Levellevel=event.getLevel();
System.err.println("convert() level:" + level);
return"DebugConverter.convert()";
}
}
<configuration>
<conversionRuleconversionWord="AST_DEBUG"
converterClass="com.apple.ast.logging.converter.DebugConverter"/>
<appendername="STDOUT"class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<!--
<pattern>%-5level %date{HH:mm:ss,SSS} [%thread]
[%class{16}] [line:%L] %msg%n</pattern>
-->
<pattern>%AST_DEBUG{%level %d %t} %m%n</pattern>
</encoder>
</appender>
<rootlevel="DEBUG">
<appender-refref="STDOUT"/>
</root>
</configuration>
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