An alternative converter of logback NamedConverter with Log4j like abbreviation

Log4jLikeNamedConverter.groovy

package jp.co.weseek.logback.pattern

import ch.qos.logback.classic.pattern.ClassicConverter
import ch.qos.logback.classic.spi.ILoggingEvent
import groovy.transform.CompileStatic
import org.apache.logging.log4j.core.pattern.NameAbbreviator

/**
 * An alternative converter of {@link ch.qos.logback.classic.pattern.NamedConverter} with Log4j like abbreviation
 * 
 * @author Yuki Takei <[email protected]>
 * @see https://logging.apache.org/log4j/2.0/manual/layouts.html
 */
@CompileStatic
class Log4jLikeNamedConverter extends ClassicConverter {

  private static NameAbbreviator abbreviator

  @Override
  void start() {
    super.start()

    if (getOptionList() != null && getOptionList().size() > 0) {
      abbreviator = NameAbbreviator.getAbbreviator(getFirstOption())
    } else {
      abbreviator = NameAbbreviator.getDefaultAbbreviator()
    }
  }

  @Override
  String convert(ILoggingEvent event) {
    final StringBuilder destination = new StringBuilder()
    abbreviator.abbreviate(event.getLoggerName(), destination)
    return destination.toString()
  }
}

Example

import jp.co.weseek.logback.pattern.Log4jLikeNamedConverter
import org.springframework.boot.logging.logback.ColorConverter
import org.springframework.boot.logging.logback.WhitespaceThrowableProxyConverter

import java.nio.charset.Charset

conversionRule 'log4jlogger', Log4jLikeNamedConverter

// See http://logback.qos.ch/manual/groovy.html for details on configuration
appender('STDOUT', ConsoleAppender) {
  encoder(PatternLayoutEncoder) {
    charset = Charset.forName('UTF-8')

    pattern =
      '%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} ' + // Date
        '%clr(%5p) ' + // Log level
        '%clr(---){faint} %clr([%15.15t]){faint} ' + // Thread
        '%clr(%-40log4jlogger{3~.5~.1}){cyan}\t%clr(:){faint} ' + // Logger
        '%m%n%wex' // Message
  }
}

Output

2017-09-14 20:45:46.370  INFO --- [           main] jp.co.w.b.Application                   	: Starting Application on MyPC (C:\Users\Yuki\...\main started by Yuki in C:\Users\Yuki\...)
2017-09-14 20:45:46.385 DEBUG --- [           main] jp.co.w.b.Application                   	: Running with Spring Boot v1.4.2.RELEASE, Spring v4.3.4.RELEASE
2017-09-14 20:45:46.385  INFO --- [           main] jp.co.w.b.Application                   	: The following profiles are active: eslocal,development
2017-09-14 20:46:15.758 DEBUG --- [           main] org.elast~.m.j.JvmService               	: using refresh_interval [1s]
2017-09-14 20:46:15.758 DEBUG --- [           main] org.elast~.m.f.FsService                	: using refresh_interval [1s]
2017-09-14 20:46:15.773 DEBUG --- [           main] org.elast~.c.r.a.d.ClusterRebalanceAllocationDecider	: using [cluster.routing.allocation.allow_rebalance] with [indices_all_active]
2017-09-14 20:46:15.773 DEBUG --- [           main] org.elast~.c.r.a.d.ConcurrentRebalanceAllocationDecider	: using [cluster_concurrent_rebalance] with [2]
2017-09-14 20:46:16.165 DEBUG --- [           main] org.elast~.c.r.a.d.ThrottlingAllocationDecider	: using node_concurrent_outgoing_recoveries [2], node_concurrent_incoming_recoveries [2], node_initial_primaries_recoveries [4]