Пружинный Загрузочный Log4j 2 пример

В этом уроке мы покажем вам, как использовать Apache Log4j 2 в Spring Boot framework.

Используемые технологии:

Пружинный ботинок 2.1.2. ВЫПУСК
Пружина 5.1.4.ОСВОБОЖДЕНИЕ
Log4j 2.11.1
Мавен 3
Java 8

1. Каталог проектов

2. Знаток

Ключ – исключить значение по умолчанию logback и включить log4j с пружинный загрузчик-стартер-log4j2



    4.0.0

    logging-log4j2
    jar
    Spring Boot log4j2 Example
    https://www.mkyong.com
    1.0

    
        org.springframework.boot
        spring-boot-starter-parent
        2.1.2.RELEASE
    

    
        1.8
    

    

        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.springframework.boot
            spring-boot-starter-thymeleaf
        

        
        
            org.springframework.boot
            spring-boot-starter
            
                
                    org.springframework.boot
                    spring-boot-starter-logging
                
            
        

        
            org.springframework.boot
            spring-boot-starter-log4j2
        

        
        
            com.lmax
            disruptor
            3.4.2
        

        
        
        

        
            com.fasterxml.jackson.dataformat
            jackson-dataformat-yaml
        

    

    
        
            
            
                org.springframework.boot
                spring-boot-maven-plugin
            

            
                org.apache.maven.plugins
                maven-surefire-plugin
                2.22.0

Отображение зависимостей проекта.

$ mvn dependency:tree

[INFO] \- org.springframework.boot:spring-boot-starter-log4j2:jar:2.1.2.RELEASE:compile
[INFO]    +- org.apache.logging.log4j:log4j-slf4j-impl:jar:2.11.1:compile <--- slf4j to log4j bridge
[INFO]    |  \- org.apache.logging.log4j:log4j-api:jar:2.11.1:compile
[INFO]    +- org.apache.logging.log4j:log4j-core:jar:2.11.1:compile
[INFO]    +- org.apache.logging.log4j:log4j-jul:jar:2.11.1:compile
[INFO]    \- org.slf4j:jul-to-slf4j:jar:1.7.25:compile

$ mvn dependency:tree

[INFO] org.springframework.boot:logging-log4j2:jar:1.0
[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter-json:jar:2.1.2.RELEASE:compile
[INFO] |  |  +- com.fasterxml.jackson.core:jackson-databind:jar:2.9.8:compile
[INFO] |  |  |  \- com.fasterxml.jackson.core:jackson-annotations:jar:2.9.0:compile
[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jdk8:jar:2.9.8:compile
[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jsr310:jar:2.9.8:compile
[INFO] |  |  \- com.fasterxml.jackson.module:jackson-module-parameter-names:jar:2.9.8:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter-tomcat:jar:2.1.2.RELEASE:compile
[INFO] |  |  +- org.apache.tomcat.embed:tomcat-embed-core:jar:9.0.14:compile
[INFO] |  |  +- org.apache.tomcat.embed:tomcat-embed-el:jar:9.0.14:compile
[INFO] |  |  \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:9.0.14:compile
[INFO] |  +- org.hibernate.validator:hibernate-validator:jar:6.0.14.Final:compile
[INFO] |  |  +- javax.validation:validation-api:jar:2.0.1.Final:compile
[INFO] |  |  +- org.jboss.logging:jboss-logging:jar:3.3.2.Final:compile
[INFO] |  |  \- com.fasterxml:classmate:jar:1.4.0:compile
[INFO] |  +- org.springframework:spring-web:jar:5.1.4.RELEASE:compile
[INFO] |  |  \- org.springframework:spring-beans:jar:5.1.4.RELEASE:compile
[INFO] |  \- org.springframework:spring-webmvc:jar:5.1.4.RELEASE:compile
[INFO] |     +- org.springframework:spring-aop:jar:5.1.4.RELEASE:compile
[INFO] |     +- org.springframework:spring-context:jar:5.1.4.RELEASE:compile
[INFO] |     \- org.springframework:spring-expression:jar:5.1.4.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-thymeleaf:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.thymeleaf:thymeleaf-spring5:jar:3.0.11.RELEASE:compile
[INFO] |  |  +- org.thymeleaf:thymeleaf:jar:3.0.11.RELEASE:compile
[INFO] |  |  |  +- org.attoparser:attoparser:jar:2.0.5.RELEASE:compile
[INFO] |  |  |  \- org.unbescape:unbescape:jar:1.1.6.RELEASE:compile
[INFO] |  |  \- org.slf4j:slf4j-api:jar:1.7.25:compile
[INFO] |  \- org.thymeleaf.extras:thymeleaf-extras-java8time:jar:3.0.2.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-autoconfigure:jar:2.1.2.RELEASE:compile
[INFO] |  +- javax.annotation:javax.annotation-api:jar:1.3.2:compile
[INFO] |  +- org.springframework:spring-core:jar:5.1.4.RELEASE:compile
[INFO] |  |  \- org.springframework:spring-jcl:jar:5.1.4.RELEASE:compile
[INFO] |  \- org.yaml:snakeyaml:jar:1.23:compile
[INFO] +- org.springframework.boot:spring-boot-starter-log4j2:jar:2.1.2.RELEASE:compile
[INFO] |  +- org.apache.logging.log4j:log4j-slf4j-impl:jar:2.11.1:compile
[INFO] |  |  \- org.apache.logging.log4j:log4j-api:jar:2.11.1:compile
[INFO] |  +- org.apache.logging.log4j:log4j-core:jar:2.11.1:compile
[INFO] |  +- org.apache.logging.log4j:log4j-jul:jar:2.11.1:compile
[INFO] |  \- org.slf4j:jul-to-slf4j:jar:1.7.25:compile
[INFO] +- com.lmax:disruptor:jar:3.4.2:compile
[INFO] \- com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:jar:2.9.8:compile
[INFO]    \- com.fasterxml.jackson.core:jackson-core:jar:2.9.8:compile

3. log4j2.xml

3.1 Создайте log4j2.xml в пути к классу проекта/|src/ресурсы/



    
        
            
        
        
            
                %d %p %c{1.} [%t] %m%n

3.2 Для log4j2.yml , нам нужно включить jackson-databind и jackson-dataformat-yaml , так как jackson-databind уже включен в Spring Boot Starter, поэтому нам просто нужно включить jackson-dataformat-yaml

	
	
	
	
		com.fasterxml.jackson.dataformat
		jackson-dataformat-yaml

Configuration:
  status: debug

  appenders:
    Console:
      name: LogToConsole
      PatternLayout:
        Pattern: "[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n"

    RollingFile:
      - name: LogToRollingFile
        fileName: logs/app.log
        filePattern: "logs/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz"
        PatternLayout:
          pattern: "[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n"
        Policies:
          SizeBasedTriggeringPolicy:
            size: 10MB
        DefaultRollOverStrategy:
          max: 10

  Loggers:
    logger:
      - name: com.mkyong
        level: debug
        additivity: false
        AppenderRef:
          - ref: LogToConsole
          - ref: LogToRollingFile

    Root:
      level: error
      AppenderRef:
        ref: LogToConsole

4. Привет log4j2 лог4j2

log4j2 4.1 Простое веб-приложение Spring MVC, входящее в систему с помощью log4j2.

package com.mkyong;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;

import java.util.Arrays;
import java.util.List;

@Controller
public class HelloController {

    private static final Logger logger = LogManager.getLogger(HelloController.class);

    private List num = Arrays.asList(1, 2, 3, 4, 5);

    @GetMapping("/")
    public String main(Model model) {

        // pre-java 8
        if (logger.isDebugEnabled()) {
            logger.debug("Hello from Log4j 2 - num : {}", num);
        }

        // java 8 lambda, no need to check log level
        logger.debug("Hello from Log4j 2 - num : {}", () -> num);

        model.addAttribute("tasks", num);
        return "welcome"; //view
    }

    private int getNum() {
        return 100;
    }

}

log4j2 4.1 Простое веб-приложение Spring MVC, ведение журнала с помощью шаблона log4j2.4.2







Spring Boot + log4j2 example

5. log4j2 4.1 Простое веб-приложение Spring MVC, ведение журнала с демонстрацией шаблона log4j2.4.2

log4j2 4.1 Простое веб-приложение Spring MVC, ведение журнала с помощью log4j2. 4.2 Демонстрационный шаблон 5.1 Запуск загрузки Spring

package com.mkyong;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class StartApplication {

    public static void main(String[] args) {
        SpringApplication.run(StartApplication.class, args);
    }

}

log4j2 4.1 Простое веб-приложение Spring MVC, ведение журнала с помощью log4j2. 4.2 Демонстрационный шаблон 5.1 Запуск загрузки Spring http://localhost:8080

Просмотрите ведение журнала:

19:10:08.723 [http-nio-8080-exec-1] DEBUG com.mkyong.HelloController - Hello from Log4j 2 - num : [1, 2, 3, 4, 5]
19:10:08.724 [http-nio-8080-exec-1] DEBUG com.mkyong.HelloController - Hello from Log4j 2 - num : [1, 2, 3, 4, 5]

6. Log4j 2 – Асинхронные регистраторы

6.1 Чтобы включить асинхронное ведение журнала, нам нужно включить разрушитель

	
		com.lmax
		disruptor
		3.4.2

6.2 Установите системное свойство log4j2.contextselector=org.apache.ведение журнала.log4j.core.асинхронный. Асинклоггерконтекстселектор

$ mvn package 

$ java -Dlog4j2.contextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector -jar target/logging-log4j2-1.0.jar

019-03-27 19:28:57,185 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3
2019-03-27 19:28:57,189 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=AsyncLoggerRingBuffer
2019-03-27 19:28:57,194 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=StatusLogger
2019-03-27 19:28:57,195 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=ContextSelector
2019-03-27 19:28:57,195 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=Loggers,name=org.springframework.boot
2019-03-27 19:28:57,196 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=Loggers,name=
2019-03-27 19:28:57,196 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=Loggers,name=com.mkyong
2019-03-27 19:28:57,197 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=Appenders,name=LogToConsole
2019-03-27 19:28:57,200 main DEBUG Registering MBean org.apache.logging.log4j2:type=AsyncContext@578486a3,component=Appenders,name=LogToFile

Скачать Исходный Код

пакет $mvn $java.apache.ведение журнала.log4j.core.асинхронный. Асинклоггерконтекстселектор-банка target/logging-log4j2-1.0.jar Доступ локальный хост: 8080