Akka SLF4J logback configuration and usage

akka, logback, scala, slf4j

Solution

With this arrangement I can use an akka.event.Logging, no need to specify SLF4J instance.

(tested 13 Dec 2013)

I get console logging and logging to a file. To prove this is not built-in logger I changed to include %X{akkaTimestamp} as explained here:

http://doc.akka.io/docs/akka/snapshot/scala/logging.html

build.sbt

library dependencies: (Akka version 2.2.3)

...
"com.typesafe.akka" %% "akka-slf4j" % "2.2.3"
"ch.qos.logback" % "logback-classic" % "1.0.9"
...

src/main/resources/application.conf

akka {
  loggers = ["akka.event.slf4j.Slf4jLogger"]
  loglevel = "INFO"
}

src/main/resources/logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <target>System.out</target>
        <encoder>
            <pattern>%X{akkaTimestamp} %-5level[%thread] %logger{0} - %msg%n</pattern>
        </encoder>
    </appender>

    <appender name="FILE" class="ch.qos.logback.core.FileAppender">
        <file>log/akka.log</file>
        <append>false</append>
        <encoder>
            <pattern>%date{yyyy-MM-dd} %X{akkaTimestamp} %-5level[%thread] %logger{1} - %msg%n</pattern>
        </encoder>
    </appender>

    <logger name="akka" level="INFO" />

    <root level="DEBUG">
        <appender-ref ref="CONSOLE"/>
        <appender-ref ref="FILE"/>
    </root>

</configuration>

This arrangement works when I use an ActorLogging mixin and also create a Logging directly:

import akka.event.Logging

val log = Logging(context.system, classOf[NameOfYourActor])

log.info("good luck!")

Problem

I have done the following steps to try and configure logging for my akka application: created an application.conf file and placed it in src/main/resources. It looks like: ``` akka { event-handlers = ["akka.event.slf4j.Slf4jEventHandler"] loglevel = "INFO" } ``` ` created a logback.xml file and placed it in src/main/resources. It looks like: ``` <configuration> <appender name="FILE" class="ch.qos.logback.core.fileappender"> <File>./logs/akka.log</File> <encoder> <pattern>%d{HH:mm:ss.SSS} [%-5level] %msg%n</pattern> </encoder> </appender> <root level="info"> <appender-ref ref="FILE" /> </root> </configuration> ``` added the following to my .scala sbt build file: ``` libraryDependencies += "com.typesafe.akka" % "akka-slf4j" % "2.0.3", libraryDependencies += "ch.qos.logback" % "logback-classic" % "1.0.9" lazy val logback = "ch.qos.logback" % "logback-classic" % "1.0.9" ``` ` attempted this code to log: ``` import akka.event.Logging val log = Logging(context.system, this) log.info("...") ``` ` All I am getting is standard output logging, no log file creation with the logs. Have I missed a step ? Or misconfigured something?

Original source

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