Writing log in file and display it on console at the same time - spring-boot

Question

here is my logback-spring.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="DEBUG_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.ThresholdFilter">
<level>DEBUG</level>
</filter>
<file>./target/log/app-debug.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>./log/target/app-debug.log-%d.gz</fileNamePattern>
<maxHistory>7</maxHistory>
</rollingPolicy>
<encoder>
<pattern>%-30(%d{HH:mm:ss.SSS} [%thread]) %-5level %logger{32} - %msg%n</pattern>
</encoder>
</appender>
<appender name="ERROR_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.ThresholdFilter">
<level>ERROR</level>
</filter>
<file>./target/log/app-error.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>./target/log/app-error.log-%d.gz</fileNamePattern>
<maxHistory>7</maxHistory>
</rollingPolicy>
<encoder>
<pattern>%-30(%d{HH:mm:ss.SSS} [%thread]) %-5level %logger{32} - %msg%n</pattern>
</encoder>
</appender>
<root level="DEBUG">
<appender-ref ref="DEBUG_FILE"/>
</root>
<root level="ERROR">
<appender-ref ref="ERROR_FILE"/>
</root>
</configuration>
Now everything log correctly but I am unable to see INFO level on my console while running the app. I still have
logging:
level:
root: INFO
file:
name: ./log/app.log
in my .yml file but there is no whatsoever logging on console.
Can I write the log in file and display it on the console at the same time?

Answer 1

You can use ConsoleAppender in your existing logback config. Below is a small snippet for your reference,
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>
%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n
</Pattern>
</layout>
</appender>
And you can control the root log level and also include the reference of your appender "DEBUG_FILE" as well to print in the console in addition to the implementation which you have done to write in a file. Below snippet is set to info to match your use case,
<root level="info">
<appender-ref ref="STDOUT" />
<appender-ref ref="DEBUG_FILE" />
</root>