spring-boot-log4j-2-demo's Introduction

Spring Boot and Log4j 2 Example

Learn how to use Log4j 2 with Spring Boot -

https://www.callicoder.com/spring-boot-log4j-2-example/

Requirements

Java - 1.8.x
Maven - 3.x.x

Steps to setup

1. Clone the application

git clone https://github.com/callicoder/spring-boot-log4j-2-demo.git

2. Build and run the app using maven

cd spring-boot-log4j-2-demo
mvn package
java -jar target/log4j2-demo-0.0.1-SNAPSHOT.jar

You can also run the app without packaging it using -

mvn spring-boot:run

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spring-boot-log4j-2-demo's Issues

How to use log4j2 with smtp appender

pom.xml

<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-log4j -->
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-log4j</artifactId>
	<version>1.3.8.RELEASE</version>
</dependency>

<!-- Needed for SMTP appender -->
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-mail</artifactId>
</dependency>

log4j2.xml

<Root level="ERROR">
      	<AppenderRef ref="MailAppender" />
</Root>

Logger use

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

private static final Logger logger = LogManager.getLogger(Welcome.class);
logger.error("Oops! We have an Error. OK");
logger.fatal("Damn! Fatal error. Please fix me.");

when run following error

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/C:/Users/vijay/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/Users/vijay/.m2/repository/org/slf4j/slf4j-log4j12/1.7.30/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]

It will help full to me if you use logger for mail with an example

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