log4j2 first version

.github/workflows/build.yaml

@@ -5,7 +5,7 @@ name: build
 on:
   # Triggers the workflow on push and pull request events but only for the "main" branch
   push:
-    branches: [ "main" ]
+    branches: [ "main", "solution", "tutorial" ]
 
 env:
   JAVA_ENV_VERSION: '21'

src/main/java/ca/mcscert/se2aa4/demos/tennis/Main.java

@@ -6,29 +6,38 @@
 import org.apache.commons.cli.Options;
 import org.apache.commons.cli.ParseException;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
 public class Main {
 
     public static int PLAYER1_STRENGTH;
     public static int PLAYER2_STRENGTH;
 
+    protected static final Logger logger = LogManager.getLogger();
+
     public static void main(String[] args) {
-        System.out.println("** Starting Tennis Counter Assistant");
-        System.out.println("**** Reading Command-Line Arguments");
+        logger.info("** Starting Tennis Counter Assistant");
+        logger.info("**** Reading Command-Line Arguments");
         Options options = new Options();
         options.addOption("p1", true, "Strength of Player 1 in [0,100]");
         options.addOption("p2", true, "Strength of Player 2 in [0,100]");
         CommandLineParser parser = new DefaultParser();
         try {
             CommandLine cmd = parser.parse(options, args);
             PLAYER1_STRENGTH = Integer.parseInt(cmd.getOptionValue("p1","50"));
-            System.out.println("****** P1's Strength is " + PLAYER1_STRENGTH+"/100");
+            logger.info("****** P1's Strength is " + PLAYER1_STRENGTH+"/100");
             PLAYER2_STRENGTH = Integer.parseInt(cmd.getOptionValue("p2","50"));
-            System.out.println("****** P2's Strength is " + PLAYER2_STRENGTH+"/100");
+            logger.info("****** P2's Strength is " + PLAYER2_STRENGTH+"/100");
         } catch (ParseException pe) {
-            System.err.println("An error has occurred");
+            logger.info("An error has occurred");
         }
-        System.out.println("**** Starting game");
-        System.out.println("** TODO...");
-        System.out.println("** Closing Tennis Counter Assistant");
+        logger.info("**** Starting game");
+        logger.info("** TODO...");
+        logger.info("** Closing Tennis Counter Assistant");
     }
+
+
+
+
 }

src/main/resources/log4j2.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="INFO">
+    <Appenders>
+        <Console name="console" target="SYSTEM_OUT">
+            <PatternLayout pattern="[%level] %logger{0} %msg%n" />
+        </Console>
+    </Appenders>
+
+    <Loggers>
+        <Root level="trace">
+            <AppenderRef ref="console" />
+        </Root>
+    </Loggers>
+</Configuration>