[maven pom.xml]<dependency>    <groupId>com.github.danielwegener</groupId>    <artifactId>logback-kafka-appender</artifactId>    <version>0.1.0</version>    <scope>runtime</scope></dependency><dependency>    <groupId>ch.qos.logback</groupId>    <artifactId>logback-classic</artifactId>    <version>1.1.2</version>    <scope>runtime</scope></dependency>

// [build.sbt]libraryDependencies += "com.github.danielwegener" % "logback-kafka-appender" % "0.1.0"libraryDependencies += "ch.qos.logback" % "logback-classic" % "1.1.7"

[src/main/resources/logback.xml]<configuration>    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">        <encoder>            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>        </encoder>    </appender>    <!-- This is the kafkaAppender -->    <appender name="kafkaAppender" class="com.github.danielwegener.logback.kafka.KafkaAppender">            <!-- This is the default encoder that encodes every log message to an utf8-encoded string  -->            <encoder class="com.github.danielwegener.logback.kafka.encoding.LayoutKafkaMessageEncoder">                <layout class="ch.qos.logback.classic.PatternLayout">                    <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>                </layout>            </encoder>            <topic>logs</topic>            <keyingStrategy class="com.github.danielwegener.logback.kafka.keying.RoundRobinKeyingStrategy" />            <deliveryStrategy class="com.github.danielwegener.logback.kafka.delivery.AsynchronousDeliveryStrategy" />            <!-- each <producerConfig> translates to regular kafka-client config (format: key=value) -->            <!-- producer configs are documented here: https://kafka.apache.org/documentation.html#newproducerconfigs -->            <!-- bootstrap.servers is the only mandatory producerConfig -->            <producerConfig>bootstrap.servers=localhost:9092</producerConfig>            <!-- this is the fallback appender if kafka is not available. -->            <appender-ref ref="STDOUT" />        </appender>    <root level="info">        <appender-ref ref="kafkaAppender" />    </root></configuration>