[logback-user] Filtering "unknown" mdc discriminator events

[ceki]

The creation of empty log files under "unknown" cannot be prevented, at 
least not easily. However, you can change the default value to point to 
a different place where it will will less noticeable. For example:

  <discriminator>
    <key>articlePath</key>
    <!-- no one looks at /tmp/... -->
    <defaultValue>/tmp/unknown</defaultValue>
  </discriminator>
-- 
Ceki

On 22.09.2012 18:51, Fred Toth wrote:
> Wow, that was quick! And simple! Yes, of course that fixed it.
>
> However, one good answer deserves another question:
>
> I now have empty logs being created, which is a step in the right
> direction. But can I eliminate the "unknown" logs completely? Right now
> every time my app fires up it creates an "unknown" directory and the
> empty timestamped log. Since this is a long running batch application, I
> will quickly end up with a bunch of these and it would be great if I
> could prevent them completely.
>
> Possible?
>
> Thanks very much for your quick response.
>
> Fred
>
> On 9/22/2012 12:33 PM, ceki wrote:
>>
>> The <OnMismatch> and <OnMatch> elements should be embedded in the
>> <filter> element, and not the <evaluator> element.
>>
>> On 22.09.2012 18:16, Fred Toth wrote:
>>> Hi,
>>>
>>> This has been written about before in this list, and I thought it would
>>> be easy, but I'm getting nowhere. Can anyone suggest what I'm doing
>>> wrong? I can confirm that my filter code is running (I see the print
>>> statements) but no matter what I return, I still end up with a log like
>>> "unknown/batchqc-<timestamp>" containing plenty of log data.
>>>
>>> I would like to eliminate these logs completely, and write logs using
>>> this sifter only when articlePath is set.
>>>
>>> The status listener is reporting:
>>>
>>> 12:03:35,652 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter at 25:37
>>> - no applicable action for [OnMismatch], current pattern is
>>> [[configuration][appender][filter][evaluator][OnMismatch]]
>>> 12:03:35,652 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter at 26:34
>>> - no applicable action for [OnMatch], current pattern is
>>> [[configuration][appender][filter][evaluator][OnMatch]]
>>>
>>> What am I missing?
>>>
>>> Config:
>>>
>>> <configuration>
>>>
>>>      <statusListener
>>> class="ch.qos.logback.core.status.OnConsoleStatusListener"/>
>>>
>>>      <timestamp key="bySecond" datePattern="yyyy-MM-dd-HH-mm-ss" />
>>>      <timestamp key="byDate" datePattern="yyyy-MM-dd" />
>>>
>>>      <appender name="ARTICLESIFT"
>>> class="ch.qos.logback.classic.sift.SiftingAppender">
>>>          <discriminator>
>>>              <key>articlePath</key>
>>>              <defaultValue>unknown</defaultValue>
>>>          </discriminator>
>>>          <sift>
>>>              <appender name="ARTICLESIFT-APPENDER"
>>> class="ch.qos.logback.core.FileAppender">
>>>                  <filter
>>> class="ch.qos.logback.core.filter.EvaluatorFilter">
>>>                      <evaluator
>>> class="ch.qos.logback.classic.boolex.JaninoEventEvaluator">
>>>                          <expression>
>>> System.out.println("MDC: " + mdc + " " + mdc.get("articlePath"));
>>> if (mdc == null
>>>      || mdc.get("articlePath") == null
>>>      || ((String)mdc.get("articlePath")).contains("unknown"))
>>>          return false;
>>> return true;
>>>                          </expression>
>>> <OnMismatch>NEUTRAL</OnMismatch>
>>>                          <OnMatch>DENY</OnMatch>
>>>                      </evaluator>
>>>                  </filter>
>>> <file>${articlePath}/batchqc-${bySecond}.log</file>
>>>                  <append>false</append>
>>>                  <encoder
>>> class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
>>>                      <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level
>>> %logger{0} - %msg%n
>>>                      </pattern>
>>>                  </encoder>
>>>              </appender>
>>>          </sift>
>>>      </appender>
>>>
>>>      <appender name="TSFILE" class="ch.qos.logback.core.FileAppender">
>>>          <file>logs/batchqc-${byDate}.log</file>
>>>          <append>true</append>
>>>          <encoder>
>>>              <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level %logger{0} -
>>> %msg%n</pattern>
>>>          </encoder>
>>>      </appender>
>>>
>>>      <root level="info">
>>>          <appender-ref ref="TSFILE" />
>>>          <appender-ref ref="ARTICLESIFT" />
>>>      </root>
>>> </configuration>
>>>
>>> Thanks,
>>>
>>> Fred
>>>
>>
>>
>


-- 
Ceki
http://tinyurl.com/proLogback