Switched to a logger system instead of System.out

Signed-off-by: Louis Vallat <louis@louis-vallat.xyz>

build.gradle

@@ -1,13 +1,23 @@
 plugins {
     id 'java'
+    id 'application'
 }
 
 group 'xyz.vallat.louis'
 version '0.1-SNAPSHOT'
 
+apply plugin : 'java'
+ext {
+    javaMainClass = 'xyz.vallat.louis.MovieQuoteBot'
+}
+
+application {
+    mainClassName = javaMainClass
+}
+
 jar {
     manifest {
-        attributes 'Main-Class': 'xyz.vallat.louis.MovieQuoteBot'
+        attributes 'Main-Class': javaMainClass
     }
     duplicatesStrategy = DuplicatesStrategy.EXCLUDE
 
@@ -21,4 +31,5 @@ repositories {
 }
 
 dependencies {
+    implementation 'ch.qos.logback:logback-classic:1.2.3'
 }

src/main/java/xyz/vallat/louis/MovieQuoteBot.java

@@ -1,9 +1,13 @@
 package xyz.vallat.louis;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 public class MovieQuoteBot {
 
     public static void main(String[] args) {
-        System.out.println("Hello World!");
+        Logger logger = LoggerFactory.getLogger(MovieQuoteBot.class.getCanonicalName());
+        logger.debug("Hello World!");
     }
 
 }

src/main/resources/logback.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true">
+    <!-- You can configure per-logger level at this point -->
+    <!-- This set of preconfigured loggers is good if you want to have a DEBUG level as baseline -->
+    <logger name="io.netty" level="INFO"/>
+    <logger name="reactor" level="INFO"/>
+
+    <!-- Display the logs in your console with the following format -->
+    <!-- You can learn more about this here: https://logback.qos.ch/manual/layouts.html#ClassicPatternLayout -->
+    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <!-- Log to a file as well, including size and time based rolling -->
+    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
+        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
+            <fileNamePattern>logs/d4j.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
+            <maxFileSize>100MB</maxFileSize>
+            <maxHistory>90</maxHistory>
+        </rollingPolicy>
+        <encoder>
+            <charset>UTF-8</charset>
+            <Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %-40.40logger{39} : %msg%n</Pattern>
+        </encoder>
+        <prudent>true</prudent>
+    </appender>
+
+    <!-- Avoid blocking while logging to file by wrapping our file appender with async capabilities -->
+    <appender name="ASYNC" class="ch.qos.logback.classic.AsyncAppender">
+        <queueSize>512</queueSize>
+        <appender-ref ref="FILE"/>
+    </appender>
+
+    <!-- Here you can set the base logger level. If DEBUG is too chatty for you, you can use INFO -->
+    <!-- Possible options are: ALL, TRACE, DEBUG, INFO, WARN, ERROR, OFF -->
+    <root level="ALL">
+        <appender-ref ref="CONSOLE"/>
+        <appender-ref ref="FILE"/>
+    </root>
+</configuration>