CODEWITHSUNDEEP
spring-bootlogbackapplication.properties
Archimedes824
Archimedes824

Reputation: 21

console pattern not recognized in logback-spring.xml

I already looked up on stackoverflow but I did not find something comparable.

I use spring boot with following dependencies:

spring-boot 2.2.1 with
spring-boot-starter-logging 2.2.1
logback-core 1.2.3
logback-classic 1.2.3

I want to use a custom pattern for my log output to print my mdc.variables on console. Which works via application.properties

logging.level.com.mypackage=TRACE
logging.pattern.level=%d{yyyy-MM-dd HH:mm:ss} [%t] [myMdc:%X{myMdcVariable}] %-5level %logger{36} - %m%n

But I get double entries but I can not set the additivity property via application.properties. I have to use logback-spring.xml. Which looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
    <include resource="org/springframework/boot/logging/logback/console-appender.xml"/>

    <root level="INFO">
        <appender-ref ref="CONSOLE"/>
    </root>

    <logger name="com.mypackage" level="TRACE" additivity="false">
        <appender-ref ref="CONSOLE"/>
    </logger>

    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <Pattern>
                %d{yyyy-MM-dd HH:mm:ss} [%t] [myMdc:%X{myMdcVariable}] %-5level %logger{36} - %m%n
            </Pattern>
        </encoder>
    </appender>
</configuration>

This solves the double entries. But the pattern is not use for the logoutput. I can have either double entries or no pattern because it is not possible to combine configuration via application.properties and logback-spring.xml. What am I doing wrong?

Upvotes: 0

Views: 1445

Answers (1)

Archimedes824
Archimedes824

Reputation: 21

I finally found out what is wrong. I checked the defaults.xml and the ConsoleAppender.xml on github e.g.

https://github.com/spring-projects/spring-boot/blob/master/spring-boot-project/spring-boot/src/main/resources/org/springframework/boot/logging/logback/defaults.xml

https://github.com/spring-projects/spring-boot/blob/master/spring-boot-project/spring-boot/src/main/resources/org/springframework/boot/logging/logback/console-appender.xml

The solution was to define the constant CONSOLE_LOG_PATTERN. And to define it before importing the defaults.xml and console-appender.xml

My working config file looks now like this:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <property name="CONSOLE_LOG_PATTERN" value="%d{yyyy-MM-dd HH:mm:ss} [%t] [myMdc:%X{myMdcVariable] %-5level %logger{36} - %m%n"/>

    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
    <include resource="org/springframework/boot/logging/logback/console-appender.xml"/>

    <root level="INFO">
        <appender-ref ref="CONSOLE"/>
    </root>

    <logger name="com.mypackage" level="TRACE" additivity="false">
        <appender-ref ref="CONSOLE"/>
    </logger>

    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>
                ${CONSOLE_LOG_PATTERN}
            </pattern>
        </encoder>
    </appender>

</configuration>

Upvotes: 2

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