adding BAEL-6471 custom log level code

Author: programenth

logging-modules/customloglevel/pom.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>3.5.3</version>
+		<relativePath/>
+	</parent>
+	<artifactId>customloglevel</artifactId>
+	<name>customloglevel</name>
+	<description>Demo project for Different Log level</description>
+	<properties>
+		<java.version>17</java.version>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+</project>

logging-modules/customloglevel/src/main/java/com/baeldung/customloglevel/CustomloglevelApplication.java

@@ -0,0 +1,11 @@
+package com.baeldung.customloglevel;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class CustomloglevelApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(CustomloglevelApplication.class, args);
+    }
+}

logging-modules/customloglevel/src/main/java/com/baeldung/customloglevel/LogController.java

@@ -0,0 +1,22 @@
+package com.baeldung.customloglevel;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class LogController {
+
+    private static final Logger logger = LoggerFactory.getLogger(LogController.class);
+
+    @GetMapping("/log")
+    public String generateLogs() {
+        logger.trace("This is a TRACE message from controller.");
+        logger.debug("This is a DEBUG message from controller.");
+        logger.info("This is an INFO message from controller.");
+        logger.warn("This is a WARN message from controller.");
+        logger.error("This is an ERROR message from controller.");
+        return "Logs generated!";
+    }
+}

logging-modules/customloglevel/src/main/resources/application.properties

@@ -0,0 +1 @@
+spring.application.name=customloglevel

logging-modules/customloglevel/src/main/resources/logback-spring.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <property name="LOGS_HOME" value="./logs"/>
+    <property name="CONSOLE_LOG_PATTERN" value="%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n"/>
+    <property name="FILE_LOG_PATTERN" value="%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n"/>
+    <property name="FILE_NAME" value="my-spring-app"/>
+    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
+            <Pattern>${CONSOLE_LOG_PATTERN}</Pattern>
+        </encoder>
+        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
+            <level>INFO</level>
+        </filter>
+    </appender>
+    <appender name="FILE" class="ch.qos.logback.core.FileAppender">
+        <file>${LOGS_HOME}/${FILE_NAME}.log</file>
+        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
+            <Pattern>${FILE_LOG_PATTERN}</Pattern>
+        </encoder>
+        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
+            <level>DEBUG</level>
+        </filter>
+    </appender>
+    <root level="DEBUG">
+        <appender-ref ref="CONSOLE"/>
+        <appender-ref ref="FILE"/>
+    </root>
+</configuration>

logging-modules/pom.xml

@@ -25,6 +25,7 @@
         <module>splunk-with-log4j2</module>
         <module>jul-to-slf4j</module>
         <module>log-all-requests</module>
+        <module>customloglevel</module>
     </modules>
 
 </project>