[logback-user] Sequence number

[ceki]

This should work:

import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.classic.pattern.ClassicConverter;

public class SequenceNumberConverter extends ClassicConverter {

   volatile int sequenceNumber = 0;

   @Override
   public String convert(ILoggingEvent event) {
     return Integer.toString(sequenceNumber++);
   }
}

On 02.07.2013 23:50, ceki wrote:
>
> In your custom converter, declare a sequenceNumber as follows:
>
>   *volatile* int sequenceNumber = 0;
>
> increment sequenceNumber for each new event:
>
>   sequenceNumber++;
>
> That's it.
>
> On 02.07.2013 23:21, Felipe wrote:
>> Hi everyone:
>>
>> I'm writing to all of you because I want to display a sequence number
>> for each event. I've done some research regarding this and I know for
>> sure that LogBack is not able to natively handle this as Log4j2 does
>> with %sn, or as JUL partially does with getSequenceNumber() (I won't be
>> changing LogBack because of this, anyway).
>>
>> I know for sure LogBack is lacking this functionality because of this
>> issue on JIRA:
>>
>> http://jira.qos.ch/browse/LOGBACK-546
>>
>> That issue is a four years old boy now.
>>
>> I found a link on Stack Overflow
>> (http://stackoverflow.com/questions/11162951/line-numbers-with-logback)
>> which lead me to the following link:
>>
>> http://logback.qos.ch/manual/layouts.html#customConversionSpecifier
>>
>> I tried a static number but it was shared across threads so it didn't
>> work that well. I also thought of ThreadLocal but I read a story which
>> freaked me out:
>>
>> http://niklasschlimm.blogspot.com/2012/04/threading-stories-threadlocal-in-web.html
>>
>>
>> Does anyone know of a good way to achieve sequentials?
>>
>> Best regards and thanks in advance.
>>
>> --
>> Felipe
>>
>>
>
>


-- 
Ceki
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