Java: How to log raw JSON as JSON and avoid escaping during logging with logback / slf4j

Question

I\'m using SLF4J with Logback in a JAX-RS application... I want to log to JSON in such a way that my message is not encoded again but printed raw into the logfile:

At t

Answer 1

here is an updated (2016) groovy logback config that dumps out your logs in json format to a file, and debug lines in the console. Took me all day to figure out so i thought i'd update the thread.

    import ch.qos.logback.classic.encoder.PatternLayoutEncoder
import ch.qos.logback.core.ConsoleAppender
import ch.qos.logback.core.rolling.FixedWindowRollingPolicy
import ch.qos.logback.core.rolling.RollingFileAppender
import ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy
import net.logstash.logback.encoder.LogstashEncoder

import static ch.qos.logback.classic.Level.INFO
import static ch.qos.logback.classic.Level.WARN

def PROJECT_ID = "com.foo"

    appender("file", RollingFileAppender) {
        file = "/tmp/logs/${PROJECT_ID}.json"
        encoder(LogstashEncoder)
        rollingPolicy(FixedWindowRollingPolicy) {
            maxIndex = 1
            fileNamePattern = "logs/${PROJECT_ID}.json.%i"
        }
        triggeringPolicy(SizeBasedTriggeringPolicy) {
            maxFileSize = "1MB"
        }
    }


    appender("STDOUT", ConsoleAppender) {
        encoder(PatternLayoutEncoder) {
            pattern = "%d{HH:mm:ss.SSS} %-5level %logger{36} - %msg%n"
        }
    }

    logger("com.foo", INFO, ["STDOUT", "file"], false)

    root(WARN, ["STDOUT", "file"])