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sumitMultanisumitMultani
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change log level at run time without restarting server
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9 files changed

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Diff for: ‎application.log

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Diff for: ‎pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.4.0</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<groupId>com.example</groupId>
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<artifactId>spring-boot-logging-example</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>spring-boot-logging-example</name>
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<description>Demo project for Spring Boot</description>
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<properties>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>ch.qos.logback</groupId>
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<artifactId>logback-classic</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

Diff for: ‎src/main/java/com/example/springbootloggingexample/SpringBootLoggingExampleApplication.java

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package com.example.springbootloggingexample;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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public class SpringBootLoggingExampleApplication {
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public static void main(String[] args) {
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SpringApplication.run(SpringBootLoggingExampleApplication.class, args);
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}
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}

Diff for: ‎src/main/java/com/example/springbootloggingexample/controller/LogController.java

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package com.example.springbootloggingexample.controller;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RequestParam;
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import org.springframework.web.bind.annotation.RestController;
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import com.example.springbootloggingexample.service.LogService;
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@RestController
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public class LogController {
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@Autowired
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private LogService logService;
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@GetMapping("/changeloglevel")
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public String changeLogLevel(@RequestParam(required = false) String loggerName,
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@RequestParam(required = false) String level) {
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return logService.setLoglevel(loggerName, level);
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}
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}

Diff for: ‎src/main/java/com/example/springbootloggingexample/controller/MessageController.java

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package com.example.springbootloggingexample.controller;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RestController;
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@RestController
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public class MessageController {
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Logger logger = LoggerFactory.getLogger(MessageController.class);
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@GetMapping("/message")
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public String getMessage() {
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logger.info("[getMessage] info message");
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logger.warn("[getMessage] warn message");
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logger.error("[getMessage] error message");
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logger.debug("[getMessage] debug message");
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logger.trace("[getMessage] trace message");
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return "open console to check log messages.";
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}
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}

Diff for: ‎src/main/java/com/example/springbootloggingexample/service/LogService.java

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package com.example.springbootloggingexample.service;
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public interface LogService {
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String setLoglevel(String loggerName, String level);
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}

Diff for: ‎src/main/java/com/example/springbootloggingexample/service/impl/LogServiceImpl.java

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package com.example.springbootloggingexample.service.impl;
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import org.slf4j.LoggerFactory;
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import org.springframework.stereotype.Service;
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import com.example.springbootloggingexample.service.LogService;
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@Service
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public class LogServiceImpl implements LogService{
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@Override
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public String setLoglevel(String loggerName, String level) {
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ch.qos.logback.classic.Logger root = getLogger(loggerName);
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return setLogLevel(level, root);
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}
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private ch.qos.logback.classic.Logger getLogger(String loggerName) {
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ch.qos.logback.classic.Logger root;
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if (loggerName != null && !loggerName.isEmpty())
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root = (ch.qos.logback.classic.Logger) LoggerFactory.getLogger(loggerName);
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else
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root = (ch.qos.logback.classic.Logger) LoggerFactory.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME);
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return root;
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}
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private String setLogLevel(String level, ch.qos.logback.classic.Logger root) {
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if ("info".equalsIgnoreCase(level)) {
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root.setLevel(ch.qos.logback.classic.Level.INFO);
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} else if ("debug".equalsIgnoreCase(level)) {
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root.setLevel(ch.qos.logback.classic.Level.DEBUG);
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} else if ("warn".equalsIgnoreCase(level)) {
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root.setLevel(ch.qos.logback.classic.Level.WARN);
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} else if ("trace".equalsIgnoreCase(level)) {
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root.setLevel(ch.qos.logback.classic.Level.TRACE);
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} else if ("error".equalsIgnoreCase(level)) {
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root.setLevel(ch.qos.logback.classic.Level.ERROR);
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} else if ("off".equalsIgnoreCase(level)) {
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root.setLevel(ch.qos.logback.classic.Level.OFF);
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} else {
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root.setLevel(ch.qos.logback.classic.Level.ALL);
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level = "all";
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}
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return "logger level set as " + level;
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}
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}

Diff for: ‎src/main/resources/application.properties

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#logging.level.com.example.springbootloggingexample.controller=DEBUG
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# Logging pattern for the console
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logging.pattern.console= %date{ISO8601} %-5level %class{0}:%L - [%X] %msg%n
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#logging pattern for file
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logging.pattern.file=%date{ISO8601} %-5level %class{0}:%L - [%X] %msg%n
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# output file
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logging.file.name=application.log

Diff for: ‎src/test/java/com/example/springbootloggingexample/SpringBootLoggingExampleApplicationTests.java

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package com.example.springbootloggingexample;
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import org.junit.jupiter.api.Test;
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import org.springframework.boot.test.context.SpringBootTest;
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@SpringBootTest
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class SpringBootLoggingExampleApplicationTests {
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@Test
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void contextLoads() {
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}
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}

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