Example using Logback in Java

build.gradle

/// Add this to your build.gradle file under dependencies:

  // Logging dependencies
  compile 'ch.qos.logback:logback-classic:1.2.3'
  compile 'ch.qos.logback.contrib:logback-json-classic:0.1.5'
  compile 'ch.qos.logback.contrib:logback-jackson:0.1.5'
  compile 'com.fasterxml.jackson.core:jackson-databind:2.9.5'
  compile 'org.codehaus.janino:janino:3.0.8'
  testCompile 'ch.qos.logback:logback-classic:1.2.3'
  testCompile 'ch.qos.logback.contrib:logback-json-classic:0.1.5'
  testCompile 'ch.qos.logback.contrib:logback-jackson:0.1.5'
  testCompile 'com.fasterxml.jackson.core:jackson-databind:2.9.5'
  testCompile 'org.codehaus.janino:janino:3.0.8'
  // end logging dependencies

Example.java

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Example {
  public static Logger logger = LoggerFactory.getLogger(BabysitterMain.class);

  public static void main(String[] args) {
    logger.info("Hello, world");
  }
}

logback.xml

<!-- this file goes in src/main/resources/logback.xml -->
<configuration>
  <!-- if the system property LOCAL is defined, we'll use a human-friendly log format -->
  <if condition='isDefined("LOCAL")'>
    <then>
      <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
          <pattern>%d [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
      </appender>
    </then>
    <else>
      <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
          <layout class="ch.qos.logback.contrib.json.classic.JsonLayout">
            <appendLineSeparator>true</appendLineSeparator>
            <jsonFormatter class="ch.qos.logback.contrib.jackson.JacksonJsonFormatter" />
          </layout>
        </encoder>
      </appender>
    </else>
  </if>

  <!-- overriding the default log level per class / package -->
  <!-- <logger name="com.example" level="INFO" /> -->

  <root level="INFO">
    <appender-ref ref="STDOUT" />
  </root>
</configuration>