Add a proper logger to examples

Author: Katrix

build.sbt

@@ -65,7 +65,9 @@ lazy val example = project
     commonSettings,
     name := "ackcord-example",
     version := "1.0",
-    libraryDependencies += "com.sedmelluq" % "lavaplayer" % "1.2.42"
+    libraryDependencies += "com.sedmelluq"     % "lavaplayer"      % "1.2.42",
+    libraryDependencies += "com.typesafe.akka" %% "akka-slf4j"     % "2.5.6",
+    libraryDependencies += "ch.qos.logback"    % "logback-classic" % "1.2.3"
   )
   .dependsOn(ackCord, ackCordCommands)
 

example/src/main/resources/application.conf

@@ -1,14 +1,16 @@
 akka {
+  loggers = ["akka.event.slf4j.Slf4jLogger"]
+  logging-filter = "akka.event.slf4j.Slf4jLoggingFilter"
 
   # Log level used by the configured loggers (see "loggers") as soon
   # as they have been started; before that, see "stdout-loglevel"
   # Options: OFF, ERROR, WARNING, INFO, DEBUG
-  loglevel = "DEBUG"
+  loglevel = DEBUG
 
   # Log level for the very basic logger activated during ActorSystem startup.
   # This logger prints the log messages to stdout (System.out).
   # Options: OFF, ERROR, WARNING, INFO, DEBUG
-  stdout-loglevel = "DEBUG"
+  stdout-loglevel = DEBUG
 
   # Log at info level when messages are sent to dead letters.
   # Possible values:

example/src/main/resources/logback.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%-5level] [%date{ISO8601}] [%logger{36}] [%X{sourceThread}] [%X{akkaSource}] %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="DEBUG">
+        <appender-ref ref="STDOUT" />
+    </root>
+
+</configuration>