[WIP] Logging Layout and Marker context integration with Scribe

[REDNBLACK]

Tofu Logging integration for Scribe

Basically just a copypasta from tofu logback layout and scribe-slf4j with minor changes, bringing Marker context and Args Array support. Made for fun.

Example of logback.xml rewrite into Scribe dsl:

<configuration>
  <appender name="rolling" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>logs/data.log</file>

    <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
      <fileNamePattern>logs/data.%i.log</fileNamePattern>
      <minIndex>0</minIndex>
      <maxIndex>8</maxIndex>
    </rollingPolicy>

    <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
      <maxFileSize>50MB</maxFileSize>
    </triggeringPolicy>

    <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
      <charset>UTF-8</charset>
      <layout class="tofu.logging.ELKLayout"/>
    </encoder>
  </appender>

  <appender name="async" class="ch.qos.logback.classic.AsyncAppender">
    <queueSize>500</queueSize>
    <discardingThreshold>0</discardingThreshold>
    <appender-ref ref="rolling" />
  </appender>

  <logger name="io.netty" level="WARN"/>
  <logger name="com.twitter.finagle" level="WARN"/>

  <statusListener class="ch.qos.logback.core.status.NopStatusListener"/>

  <root level="debug">
    <appender-ref ref="async"/>
  </root>
</configuration>

import java.nio.file.Paths

import scribe.{Level, Logger}
import scribe.writer.FileWriter
import scribe.writer.file.{LogPath, FlushMode}
import scribe.handler.{AsynchronousLogHandler, Overflow}
import scribe.filter
import scribe.filter.{className, level}

import tofu.logging.ELKFormatter

Logger
    .root
    .clearHandlers()
    .clearModifiers()
    .withMinimumLevel(Level.Debug)
    .withHandler(AsynchronousLogHandler(
      maxBuffer = 500,
      overflow  = Overflow.Block,

      writer    = FileWriter()
        .io
        .withFlushMode(FlushMode.AsynchronousFlush(1.second))
        .path(LogPath.simple(
          directory = Paths.get("logs"),
          name = "data.log"
        ))
        .maxLogs(9)
        .maxSize(50_000_000),

      formatter = ELKFormatter.merge,

      modifiers = List(
        filter
          .select(
            className startsWith "com.twitter.finagle",
            className startsWith "io.netty"
          )
          .include(level >= Level.Warn)
      )
    ))
    .replace()