Added Log Group Sample (#9112)

spring-boot-modules/spring-boot-logging-log4j2/src/main/java/com/baeldung/group/LogGroupApplication.java

@@ -0,0 +1,26 @@
+package com.baeldung.group;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@SpringBootApplication
+@ActiveProfiles("log-group")
+public class LogGroupApplication {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(LogGroupApplication.class);
+
+    @RequestMapping("/log-group")
+    public void justLog() {
+        LOGGER.debug("Received a request");
+    }
+
+    public static void main(String[] args) {
+        SpringApplication.run(LogGroupApplication.class, args);
+    }
+}

spring-boot-modules/spring-boot-logging-log4j2/src/main/resources/application-log-group.properties

@@ -0,0 +1 @@
+logging.level.web=debug